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Journal articles on the topic 'Cobal(III) complexes'

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Published: 5 June 2025

Last updated: 1 August 2025

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1

N., Balasubramanian, and Violet Dhayabaran V. "Synthesis and characterization of complexes of cobalt(III) with pentadentate 1 ,2-propanediaminetetraacetic acid, 1 ,3-propanediaminetetraacetic acid and trans-1 ,2-cyclohexanediaminetetraacetic acid." Journal of Indian Chemical Society Vol. 83, Mar 2006 (2006): 272–75. https://doi.org/10.5281/zenodo.5835502.

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PG & Research Department of Chemistry, Bishop Heber College, Tiruchirappalli-620 017, Tamilnadu, India <em>E-mail</em> : violetstaff@yahoo.co.in <em>Manuscript received 7 February 2005, revised 21 November 2005, accepted 2 December 2005</em> The pentadentate complexes of cobalt(lll) with stereospecific ligands 1,2-propanediamine tetraacetic acid (1,2- PDTA), 1,3-propanediaminetetraacetic acid (1,3-PDTA) and trans-1,2-cyclohexanediaminetetraacetic acid (trans-1,2-CyDTA) have been synthesized. Elemental analysis and spectral analysis including IR and <sup>1</sup>H NMR have been carried out.

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2

R.N., Sharma, Poonam Giri (Ms.), Kumar Amritesh, Alpana Kumari (Ms.), and N. Pandey R. "Synthesis, spectral and antifungal studies of some iron(II,III) and cobalt(II) complexes of 4-amino-3-ethyl-5-mercapto-S-triazole." Journal of Indian Chemical Society Vol. 83, Nov 2006 (2006): 1139–41. https://doi.org/10.5281/zenodo.5832464.

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Department of Chemistry, K. N. Govt. P.G. College, Gyanpur, Sant Ravidas Nagar, Bhadohi-221 304, Uttar Pradesh, India RMCH, Ranchi, Jharkhand, India Department of Chemistry, College of Commerce, Patna-800 020, Bihar, India <em>Manuscript received 14 February 2005, revised 7 August 2006, accepted 11 August 2006</em> 4-Amino-3-ethyl-5-mercapto-<em>S</em>-trizole forms some air stable complexes with Fe<sup>II,</sup><sup>III</sup> and Co<sup>II</sup> ions. All complexes are characterized through elemental analysis, molar conductance, magnetic susceptibility, electronic and infra red spectral

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3

RAJIB, LAL DE, and KUMAR BHAR SANJIB. "Mixed-ligand Complexes of Cobalt(III) with Dimethylglyoxime." Journal of Indian Chemical Society Vol. 71, May 1994 (1994): 245–48. https://doi.org/10.5281/zenodo.5894738.

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Department ot Chemistry, lnorganic Chemistry Section, Jadavpur University, Calcutta-700 032 <em>Manuscript received 9 February 1993, revised 17 June 1993, accepted 23 June 1993</em> Mixed-ligand complexes of cobalt(III) of the types [Co(SBx)(DMGH)] and [Co(SBy)(DMGH)], where SBx = dianion of tetradentate Schiff base; SBy = monoanion of bidentate Schiff base; DMGH = monoanion of dimethylglyoxime, were isolated from the reaction of alcoholic suspension of cobalt(III) dimethylglyoximate dihydrate with Schiff bases in 1 : 1 and 1 : 2 molar ratios for SBx and SHy respectively. Further mixed-ligand

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4

KAILASH, C. DASH. "Cobalt(III) Complexes of Oximes and related Schiff Bases as Models for Vitamin B12." Journal of Indian Chemical Society Vol. 71, May 1994 (1994): 227–38. https://doi.org/10.5281/zenodo.5894727.

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5

RAJMUHON, NONGMAITHEM, NONGMAITHEM RAJEN, AKHAM JIBANLATA, LANGPOKLAKPAM SANAHAL, and AKOIJAM MANIHAR. "Studies on Outer-sphere Association of some Diamminebis( 1-amidino-0-alkylurea)cobalt(III) Complexes." Journal of Indian Chemical Society Vol. 72, Oct 1995 (1995): 665–69. https://doi.org/10.5281/zenodo.5909094.

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Department of Chemistry, Manipur University, Canchipur, Imphal-795 003 <em>Manuscript received 26 August 1993, revised 3 March 1994, accepted 22 March 1994</em> Conductometric studies of the equilibria : [Co(NH<sub>3</sub>)<sub>2</sub>(AMUH)<sub>2</sub>]<sup>3+</sup> X \(\rightleftharpoons\) {[Co(NH<sub>3</sub>)<sub>2</sub>(AMUH)<sub>2</sub>]X}<sup>2+</sup> and [Co(NH<sub>3</sub>)<sub>2</sub>- (AEUH)<sub>2</sub>] <sup>3+ <sub>+</sub></sup>X<sup>-</sup> \(\rightleftharpoons\) {[Co(NH<sub>3</sub>)<sub>2</sub>(AEUH)<sub>2</sub>]X}<sup>2+</sup> (AMUH = 1-amidino-<em>0

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6

BISWANATH, CHAKRAVARTY, and KUMAR SINGH ASHOKE. "Mechanistic Studies on the Bridge Cleavage Reaction of the Dinuclear Ethylenedibiguanide Complexes of Ruthenium-, Cobalt-, Chromium- and Rhodium(III) in Acidic Medium." Journal of Indian Chemical Society Vol. 74, May 1997 (1997): 373–77. https://doi.org/10.5281/zenodo.5881712.

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Department of Chemistry, University of Kalyani, Kalyani-741 235 <em>Manuscript received 22 February 1995, revised 20 September 1995, accepted 14 February 1996</em> Acid-catalysed bridge cleavage reactions of four metal-ethylenedibiguanide (EDG) (metal = Ru<sup>III</sup>, Co<sup>III</sup>, CO<sup>III</sup>, Rh<sup>III</sup> complexes have been investigated in perchloric acid and for Ru<sup>III</sup>. complex in nitric and paratoluenesulphonic acids also. The Comm complex reacts both via acid-dependent and acid-free paths, while other complexes by acid-dependent path only. Rate law for the

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7

S., SAHA, MUKHERJI D., and K. SARKAR S. "Photochemical Study of Cobalt(III) Complexes in Mixed Aqueous Glycol System." Journal of Indian Chemical Society Vol. 71, Oct 1994 (1994): 597–601. https://doi.org/10.5281/zenodo.5896381.

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A. B. N. Seal College, Coach Behar Bethune College, Calcutta Department of Chemical Technology, University College of Science and Technology, Calcutta-700 00<em>9 Manuscript received 11 February 1993, accepted 29 July 1993</em> Homolytic metal-ligand bond fission in the excited state of (LMCT) character leads to redox decomposition. Some differences in opinions are there in the mechanism of redox decomposition regarding whether or not the radical pair generated by the excited state bond fission can undergo geminate recombination or diffusive separation during the life-time of the excited state

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8

R., K. Nanda. "Some aspects of the coordination chemistry of cobalt(III)." Journal of Indian Chemical Society Vol. 77, Nov-Dec 2000 (2000): 657–64. https://doi.org/10.5281/zenodo.5869907.

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Department of Chemistry, Utkal University, Bhubaneswar-751 004, India <em>Manuscript received 8 November 2000</em> Octahedral cobalt(III) complexes have played a central role in the elucidation of mechanisms of inorganic reactions. Some aspects of ligand substitution and redox reactions of low-spin octahedral cobalt(III) complexes in solution are discussed. The reactions include : (i) acid and base hydrolysis of halogenoaminecobalt(m) complexes, (ii) anation of aqua-aminecobalt(iiI) ions, (iii) acid, base and metal ion catalysed hydrolysis of carboxylatoaminecobalt(iii) complexes, and (iv) oxi

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9

Arderne, Charmaine, Kyle Fraser Batchelor, Bhawna Uprety, Rahul Chandran, and Heidi Abrahamse. "Reactivity trends of cobalt(III) complexes towards various amino acids based on the properties of the amino acid alkyl chains." Acta Crystallographica Section C Structural Chemistry 76, no. 7 (2020): 663–72. http://dx.doi.org/10.1107/s2053229620007123.

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The reactivity of the cobalt(III) complexes dichlorido[tris(2-aminoethyl)amine]cobalt(III) chloride, [CoCl2(tren)]Cl, and dichlorido(triethylenetetramine)cobalt(III) chloride, [CoCl2(trien)]Cl, towards different amino acids (L-proline, L-asparagine, L-histidine and L-aspartic acid) was explored in detail. This study presents the crystal structures of three amino acidate cobalt(III) complexes, namely, (L-prolinato-κ2 N,O)[tris(2-aminoethyl)amine-κ4 N,N′,N′′,N′′′]cobalt(III) diiodide monohydrate, [Co(C5H8NO2)(C6H18N4)]I2·H2O, I, (L-asparaginato-κ2 N,O)[tris(2-aminoethyl)amine-κ4 N,N′,N′′,N′′′]co

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10

ASIM, KUMAR MAJHI, та CHAKRAVARTY BISWANATH. "Acid Aquation of Mixed Chelate Complexes. Aquation of Glycinato- and α- and β-Alaninatoethylenebisbiguanidecobalt(III) Complexes". Journal of Indian Chemical Society Vol. 75, Mar 1998 (1998): 140–42. https://doi.org/10.5281/zenodo.5915578.

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Department of Chemistry, University of Kalyani, Kalyani-741 235 <em>Manuscript received 21 February 1997, revised 23 May 1997, accepted 29 May 1997</em> Acid-catalysed aquation of three amino acid chelates of cobalt(III) has been investigated in order to study the influence of chelate size and ring pattern on the rates of reactions. The complex ion chosen is Co(EBB)(am)<sup>2+</sup>, where EBB = ethylenebisbiguanide and am = glycinate (Giy), α-alaninate (α-Alan) and β-Alaninate (β-Alan). The observed pseudo-first order rate constant varies linearly with acid concentration

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11

Biswanath, Chakravarty. "Substitution reactions of ligand bridged dinuclear complexes of cobalt(III) and chromium(III)." Journal of India Chemical Society Vol. 84, Jan 2007 (2007): 9–19. https://doi.org/10.5281/zenodo.5810176.

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Department of Chemistry, University of Kalyani, Kalyani-741 235, West Bengal, India <em>E-mail</em> : biswanath chakravarty@yahoo. co. in <em>Manuscript received 12 October 2006, accepted 2 November 2006</em> This review encompasses the substitution reactions of various single and multiple bridged cobalt(III) and chromium(III) complexes. The reactions have been categorized with various bridging ligands, like oxo, peroxo, superoxo, hydroxo, cyano, carbonato, sulphato, amido etc. ligands. Reactions have usually been made in aqueous and basic media. In multiple bridged complexes, bridge cleavage

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12

Laan, Ramon G. W., Tona Verburg, H. Th Wolterbeek, and Jeroen J. M. de Goeij. "Photodegradation of Iron(III)-EDTA: Iron Speciation and Domino Effects on Cobalt Availability." Environmental Chemistry 1, no. 2 (2004): 107. http://dx.doi.org/10.1071/en04025.

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Environmental Context. Aquatic life requires access to sufficient nutrients and trace metals in the surrounding waters. Measuring the speciation (in solution or precipitated, free ionic or complexed) of trace metals is a traditional procedure to assess the potential of waters for life. Iron, an important nutrient, is relatively insoluble, and metal–ligand complexes are required to keep the iron in solution and bioavailable. Sunlight often degrades these metal–ligand complexes, and the subsequently released iron can outcompete other (trace) metals for their ligands. A ‘domino’ effect on weaker

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13

S., C. Nayak, C. Sahoo K., and K. Das P. "Synthesis and structure of some cobalt(III) complexes with azide, dimethylglyoxime and heterocyclic nitrogen donor ligands." Journal of Indian Chemical Society Vol. 81, May 2004 (2004): 420–23. https://doi.org/10.5281/zenodo.5833126.

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Department of Chemistry, B.N.M.A. College, Paliabindha, Bhadrak-756 167, India <em>E-mail</em> : nayaksarat@yahoo.com P.G. Department of Chemistry, Bhadrak College, Bhadrak-756 100, India Department of Chemistry, F. M. College, Balasore-756 00 1, India <em>Manuscript received 25 October 2002, revised 10 July 2003, accepted 2 December 2003</em> A series of new hydrogen bonded <em>trαns</em>-azidocobaloxirne of the type [Co(DH)<sub>2</sub>N<sub>3</sub>L] where DH = dimethylglyoximato anion, L =[pyridine, piperidine, piperazine, quinoline, iso-quinoline, triazole, indole, benzimidazole, ben

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14

NONGMAITHEM, RAJMUHON SINGH, RAJEN SINGH NONGMAITHEM, and MANIHAR SINGH AKOIJAM. "Studies on Outer-sphere Association of Tris( 1-amidino-O- alkylurea)- and Glycinato-bis( 1-amidino-O-methylurea)- cobalt(III) Complexes." Journal of Indian Chemical Society Vol. 73, Aug 1996 (1996): 419–21. https://doi.org/10.5281/zenodo.5897906.

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Department of Chemistry, Manipur University, Imphal-795 003 <em>Manuscript received 4 November 1993, revised 29 November 1994, accepted 29 December 1994</em> Studies on Outer-sphere Association of Tris( 1-amidino-<em>O</em>- alkylurea)- and Glycinato-bis( 1-amidino-<em>O</em>-methylurea)- cobalt(III) Complexes.

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15

N., H. EL-HAMMAMY, A. EL-SHAZLY S., H. SOROUR M., and M. ABD EL-HALIM F. "Electrical Conductance of Cobalt(III) Complexes of Acetylpyridinethiosemicarbazone Halides in Methanol at 25°." Journal of Indian Chemical Society Vol. 68, Dec 1991 (1991): 668–69. https://doi.org/10.5281/zenodo.6135146.

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Chemistry Department, Faculty of Science, Alexandria University, Alexandria, Egypt <em>Manuscript received 25 April 1991,revised 28 October 1991, accepted 31 December 1991</em> The Fuoss-Onsager equation for 1 : 1 electrolytes<sup>1</sup> has been applied to study the electrolytic conductance of the Co<sup>III</sup> complexes of acetylpyridinethiosemicarbazone halides in methanol at 25°. The effect of the solvated anion size on the conductance of these complexes has been discussed in the light of the variation of both the association constant <em>K<sub>A</sub></em> and the closest distance

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16

K., Sivaraj, та P. Elango K. "Cobalt(III) complexes of the type cis-β-[Co(trien)(4-R-Py)CI]CI2 : Synthesis, spectral characterization and redox behaviour". Journal of Indian Chemical Society Vol. 86, Aug 2009 (2009): 869–73. https://doi.org/10.5281/zenodo.5819420.

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Department of Chemistry, Gandhigram Rural University, Gandhigram-624 302, Tamilnadu, India <em>E-mail </em>: drkpelango@rediffmail.com <em>Manuscript received 15 July 2008, revised 26 March 2009, accepted 27 April 2009</em> Sb. new cobalt(III) complexes of the type<em> cis</em>-β-(Co(trien)(4-R-Py)CI]C2, where R = H, Me, Et, <em>t-</em>Bu, COMe and CN have been prepared and characterized by elemental analysis, UV-Vis, FT-IR and <sup>1</sup>H NMR spectral techniques. The results of the spectral studies revealed that these complexes posses a <em>cis</em>-β arrangement of ligands around

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17

Veeralakshmi, Selvakumar, Selvan Nehru, Gopal Sabapathi, et al. "Single and double chain surfactant–cobalt(iii) complexes: the impact of hydrophobicity on the interaction with calf thymus DNA, and their biological activities." RSC Advances 5, no. 40 (2015): 31746–58. http://dx.doi.org/10.1039/c5ra02763b.

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18

Sushil, Kumar, and Gupta Rajeev. "Heterogeneous ring-opening reactions and Knoevenagel condensation reactions with cobalt complexes: Effect of CoII versus CoIII states on catalysis." Journal of Indian Chemical Society Vol. 95, Jul 2018 (2018): 843–52. https://doi.org/10.5281/zenodo.5642038.

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Department of Chemistry, University of Delhi, Delhi-110 007, India <em>E</em>-<em>mail:</em> rgupta@chemistry.du.ac.in <em>Manuscript received 05 July 2018, accepted 20 July 2018</em> This work illustrates comparative catalytic performance of two sets of cobalt complexes within a common macrocyclic ligand environment: Co<sup>II</sup> complexes <strong>1 </strong>and <strong>2 </strong>versus Co<sup>III</sup> complexes <strong>3 </strong>and <strong>4</strong>. All four cobalt complexes functioned as the heterogeneous catalysts for the ring-opening reactions of assorted epoxides as well as

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19

G., BOOPATHY, KAMALAKANNAN P., and VENKAPPAYYA D. "Metal Complexes of 4-Dimethylaminomethylantipyrine with lron(III), Cobalt(II), Copper(II) and Zinc(II)." Journal of Indian Chemical Society Vol. 69, Jun 1992 (1992): 326–27. https://doi.org/10.5281/zenodo.6088675.

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Department of Chemistry, Regional Engineering College, Tiruchirapalli-620 015 <em>Manuscript received 5 October 1991, accepted 20 April 1992</em> Metal Complexes of 4-Dimethylaminomethylantipyrine with lron(III), Cobalt(II), Copper(II) and Zinc(II).

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20

Alam, M. M., S. M. S. Islam, S. M. M. Rahman, and M. M. Rahman. "Simultaneous Preparation of Facial and Meridional Isomer of Cobalt-Amino Acid Complexes and their Characterization." Journal of Scientific Research 2, no. 1 (2009): 91–98. http://dx.doi.org/10.3329/jsr.v2i1.2032.

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Preparation and characterization of various complexes of cobalt (III)-amino acid system, especially cobalt (III) glycinato and cobalt (III) alaninato complexes are reported. The identification of the various isomers of these complexes is also reported. The various isomers are separated from their mixture by fractional crystallization. Each of these complexes has been characterized by observing physical characteristics, chemical analysis, UV-visible spectroscopy and IR-spectroscopy. The direct impact of geometry of the complexes to IR stretching frequencies and UV-visible spectral data of amino

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21

Kamal, Kishor Verma, and Kumar Verma Suresh. "Microwave Assisted Synthesis, Spectroscopic Characterization and Antimicrobial Activities of Co(II) Complexes Containing Biologically Active Thiosemicarbazone Derivatives." Chemistry Research Journal 6, no. 5 (2021): 80–86. https://doi.org/10.5281/zenodo.11805215.

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<strong>Abstract </strong>In present study two thiosemicarbazone ligands i.e. 4HAT and 3NBT and their  novel Cobal(II) aryl thiosemicarbazones complexes having the general composition [Co(L<sub>1</sub>)<sub>2</sub>Cl<sub>2</sub>], [Co(L<sub>2</sub>)<sub>2</sub>Cl<sub>2</sub>],{where L<sub>1</sub>= 4-Hydroxyacetophenone thiosemicarbazones (4HAT), L<sub>2 </sub>= 3-Nitrobenzaldehyde thiosemicarbazones (3NBT), have been synthesized by the reaction of thiosemicarbazide with substituted aromatic aldehydes and ketones by conventional heating as well as microwave irradiations method followed by

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22

RAJIB, LAL DE, KUMAR BHAR SANJIB, and KANUNGO SANCHEETA. "Mixed-ligand Cobalt (III) Complexes involving Non-basic Schiff Bases." Journal of Indian Chemical Society Vol. 69, Dec 1992 (1992): 855–56. https://doi.org/10.5281/zenodo.6118065.

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Department of Chemistry, Inorganic Chemistry Section, Jadavpur University, Calcutta-700 032 <em>Manuscript received 28 February 1992, revised 6 July 1992, accepted 18 August 1992</em> Mixed-ligand Cobalt (III) Complexes involving Non-basic Schiff Bases.<em> </em>  

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23

Bernhardt, Paul V., Trevor W. Hambley, Geoffrey A. Lawrance, Marcel Maeder, and Eric N. Wilkes. "Isomers of 1,4,8,11-Tetraazacyclotetradecane-6,13-dicarboxylate Characterized as Cobalt(III) Complexes." Australian Journal of Chemistry 56, no. 7 (2003): 679. http://dx.doi.org/10.1071/ch02246.

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The major trans (1) and minor cis (2) isomers of 1,4,8,11-tetraazacyclotetradecane-6,13-dicarboxylate have been characterized as the complexes [Co(1)](ClO4) and [Co(H2)(OH2)]Cl(ClO4)·H2O. The former crystallized in the C2/c space group and the latter in the P21/c space group, with cell parameters a 16.258(7), b 9.050(3), c 15.413(6) Å, β133.29(3)°, and a 9.694(4), b 16.135(1), c 12.973(5) Å, β 93.00(2)°, respectively. Their characterization completes identification of the respective trans and cis isomers for the series of c-pendant macrocycles also including 1,4,8,11-tetraazacyclotetradecane-6

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Uprety, Bhawna, Rahul Chandran, Charmaine Arderne, and Heidi Abrahamse. "Anticancer Activity of Urease Mimetic Cobalt (III) Complexes on A549-Lung Cancer Cells: Targeting the Acidic Microenvironment." Pharmaceutics 14, no. 1 (2022): 211. http://dx.doi.org/10.3390/pharmaceutics14010211.

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Tumour cells maintain a local hypoxic and acidic microenvironment which plays a crucial role in cancer progression and drug resistance. Urease is a metallohydrolases that catalyses the hydrolysis of urea into ammonia and carbon dioxide, causing an abrupt increase of pH. This enzymatic activity can be employed to target the acidic tumour microenvironment. In this study, we present the anticancer activities of urease mimetic cobalt (III) complexes on A549 cells. The cells were treated with different doses of cobalt (III) complexes to observe the cytotoxicity. The change in cellular morphology wa

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NICHOLAS, J. BLUNDELL, BURGESS JOHN, P. DASGUPTA TARA, ABDUR RASHID KAMALUDDIN, and GUARDAD0 PILAR. "Solvation of Cobalt(III) Complexes: Partial Molar Volumes and Transfer Chemical Potentials." Journal of Indian Chemical Society Vol. 69, Aug 1992 (1992): 426–32. https://doi.org/10.5281/zenodo.6006720.

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Chemistry Department, University of Leicester, Leicester LEl 7RH, U.K. Chemistry Department, University of the West Indies, Mona, Kingston 7,Jamaica Departamento de Quimica Fisica, Universidad de Sevilla, 41012 Sevilla, Espana <em>Manuscript </em><em>received 13 February 1991</em> Partial molar volumes for cobalt(III) complexes in aqueous solution are reviewed, and transfer chemical potentials for this family of complexes to aqueous methanol collated. The relevance of such information to the understanding of hydration of these complexes is outlined. Preliminary results on binucl

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Nikovskii, I. A., D. A. Babakina, G. L. Denisov, Yu V. Nelyubina, and E. A. Khakina. "Study of the Reduction of Cobalt(III) Complexes by In Situ NMR Spectroscopy." Координационная химия 49, no. 1 (2023): 27–35. http://dx.doi.org/10.31857/s0132344x22700037.

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An approach for monitoring the redox activation of drug delivery in cobalt(III) complexes by in situ NMR spectroscopy is proposed. The reduction of the heteroleptic cobalt(III) complexes containing the 6,7-dihydroxycoumarin molecule applied as a model drug is studied using the proposed approach. The replacement of the bipyridine ligand in the cobalt(III) complex by phenanthroline considerably increases the redox-activated release rate of the drug.

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Ali Mohamed, Ahmed Y. "STUDIES ON THE BACTERIAL ACTIVITY OF COBALT(III) COMPLEXES. PART III. COBALT(III) CARBOXYLATE COMPLEXES." Journal of Coordination Chemistry 29, no. 4 (1993): 233–46. http://dx.doi.org/10.1080/00958979308037429.

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Mohamed, Ahmed Y. Ali. "STUDIES ON THE BACTERIAL ACTIVITY OF COBALT(III) COMPLEXES. PART III. COBALT(III) CARBOXYLATE COMPLEXES." Journal of Coordination Chemistry 29, no. 3 (1993): 233–46. http://dx.doi.org/10.1080/00958979308045670.

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Izmesteva, V. A., and A. M. Elokhov. "EXTRACTION OF CHLORIDE AND THIOCYATE ACIDOCOMPLEXES OF METALS IN SALTING-OUT AGENT – MONOALKYLPOLYETHYLENE GLYCOL – WATER SYSTEMS." Вестник Пермского университета. Серия «Химия» = Bulletin of Perm University. CHEMISTRY 11, no. 4 (2021): 244–53. http://dx.doi.org/10.17072/2223-1838-2021-4-244-253.

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Distribution of iron (III), thallium (III, gallium, titanium (IV) chloride complexes in sodium chloride – synthanol DS-10 – water and ammonium sulfate – synthanol DS-10 – water systems, as well as iron (III), cobalt , nickel, cadmium and copper (II) thiocyanate complexes in the ammonium sulfate – synthanol DS-10 – water system investigated. It was found that the main influence on extraction is exerted by solution acidity and nature of the salting-out agent. The conditions for quantitative extraction of thallium (III) and gallium in the form of chloride complexes, as well as the conditions for

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30

Fang, Jiaxin, Philipp Gerschel, Kuldip Singh, Ulf-Peter Apfel, and Kogularamanan Suntharalingam. "Cobalt(III)–Macrocyclic Scaffolds with Anti-Cancer Stem Cell Activity." Molecules 29, no. 12 (2024): 2743. http://dx.doi.org/10.3390/molecules29122743.

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Cobalt(III) compounds with tetradentate ligands have been widely employed to deliver cytotoxic and imaging agents into cells. A large body of work has focused on using cobalt(III)–cyclam scaffolds for this purpose. Here, we investigate the cytotoxic properties of cobalt(III) complexes containing 14-membered macrocycles related to cyclam. A breast cancer stem cell (CSC) in vitro model was used to gauge efficacy. Specifically, [Co(1,4,7,11-tetraazacyclotetradecane)Cl2]+ (1) and [Co(1-oxa-4,8,12-triazacyclotetradecane)Cl2]+ (2) were synthesised and characterised, and their breast CSC activity was

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RAJIB, LAL DE, and KUMAR BHAR SANJIB. "Reactions of Sodium Cobaltinitrite with Bidentate—Ligands-Synthesis of Mixed-ligand Complexes of Cobalt(III)." Journal of Indian Chemical Society Vol. 69, Dec 1992 (2022): 856–58. https://doi.org/10.5281/zenodo.6118477.

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Department of Chemistry, Inorganic Chemistry Section, Jadavpur University, Calcutta-700 032 <em>Manuscript received 6 July 1992, accepted 18 August 1992</em> Reactions of Sodium Cobaltinitrite with Bidentate—Ligands-Synthesis of Mixed-ligand Complexes of Cobalt(III).  

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32

Djordjevic, Ivana, Jelena Vukasinovic, Tamara Todorovic, et al. "Synthesis, structures and electronic properties of Co(III) complexes with 2-quinolinecarboxaldehyde thio- and selenosemicarbazone: A combined experimental and theoretical study." Journal of the Serbian Chemical Society 82, no. 7-8 (2017): 825–39. http://dx.doi.org/10.2298/jsc170412062d.

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Cobalt(III) complexes derived from thio- and selenosemicarbazone ligands have been studied to elucidate the nature and consequences of S to Se substitution on their possible biological activity. Solid state structures of cobalt(III) complexes with bis-tridentate coordinated 2-quinolinecarboxaldehyde thio- and selenosemicarbazone were determined by single crystal X-ray diffraction analysis. The complexes were also characterized by spectroscopic methods and cyclic voltammetry. Electronic properties of the complexes were studied using DFT and TD?DFT methods. Finally, evident in vitro antioxidant

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33

Geisenberger, Josef, Jürgen Erbe, Jürgen Heidrich, Ulrich Nagela, and Wolfgang Beck. "Pseudohalogenometallverbindungen, LXV [1] Synthese von Tetrazolen und Triazolen über die 1,3-dipolare Cycloaddition an die Azid-Liganden von polymeren Cobalt(III)-und Palladium(II)-Komplexen. Darstellung und Struktur von 5-TrichlormethyItetrazol / Pseudohalogeno Metal Compounds, LXV [1] Synthesis of Tetrazoles and Triazoles via 1,3-Dipolar Cycloaddition to the Azido Ligands of Polymerie Cobalt(III) and Palladium(II) Complexes. Synthesis and Structure of 5-Trichloromethyltetrazole." Zeitschrift für Naturforschung B 42, no. 1 (1987): 55–64. http://dx.doi.org/10.1515/znb-1987-0112.

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Abstract The cycloaddition of nitriles and of dimethylacetylenedicarboxylate to the azide ligand of polymeric Schiff Base cobalt(III) and phosphine palladium(II) complexes gives the corresponding tetrazolate and triazolate complexes from which the heterocycles could be cleaved by hydrogen chloride. Usually the yields are low; if the heterocycle is soluble in ether or sublimable, yields up to 30% have been obtained. Using this method the hitherto unknown 5-trichlormethyltetrazole could be prepared which was characterized by an X-ray structural analysis. Similarly, the cyclo-addition of azido(te

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34

Selvi, M. Amutha, S. Preethi Sherina Mary, and R. Chandradevi. "Synthesis, Characterization and Structural Analysis of Cobaloximes Complexes." Asian Journal of Chemistry 34, no. 6 (2022): 1575–80. http://dx.doi.org/10.14233/ajchem.2022.23703.

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A series of bioactive cobalt(III) complexes were synthesized with bidentate ligand have been investigated as vitamin B12 models. The experiment was two pot snythesis, in the first part was green microcrystalline dihalo(dimethylglyoximato)cobalt(III) and second part was brown microcrystalline halo(pyridine based ligand) cobaloximes. Final part of synthesized complexes was characterized by IR, electronic and NMR spectral studies. Infrared spectra of metal complexes indicated the formation of Co-N axial bond and Co-N equatorial bond. Thermal analysis revealed that the Co(III) complexes were stabl

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35

Aiyelabola, Temitayo, Ezekiel Akinkunmi, Isaac Ojo, Efere Obuotor, Clement Adebajo, and David Isabirye. "Syntheses, Characterization, Resolution, and Biological Studies of Coordination Compounds of Aspartic Acid and Glycine." Bioinorganic Chemistry and Applications 2017 (2017): 1–15. http://dx.doi.org/10.1155/2017/2956145.

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Enantiomerically enriched coordination compounds of aspartic acid and racemic mixtures of coordination compounds of glycine metal-ligand ratio 1 : 3 were synthesized and characterized using infrared and UV-Vis spectrophotometric techniques and magnetic susceptibility measurements. Five of the complexes were resolved using (+)-cis-dichlorobis(ethylenediamine)cobalt(III) chloride, (+)-bis(glycinato)(1,10-phenanthroline)cobalt(III) chloride, and (+)-tris(1,10-phenanthroline)nickel(II) chloride as resolving agents. The antimicrobial and cytotoxic activities of these complexes were then determined.

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36

Salib, Kamal A. R., Samy M. Abu El-Wafa, Salah B. El-Maraghy, and Saied M. El-Sayed. "Sulfitoamine Complexes of Cobalt(III)." Phosphorus, Sulfur, and Silicon and the Related Elements 46, no. 3-4 (1989): 131–38. http://dx.doi.org/10.1080/10426508909412058.

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37

Massoud, Salah S., Franz A. Mautner, Morsy Abu-Youssef, and Nadia M. Shuaib. "Azido–amine–cobalt(III) complexes." Polyhedron 18, no. 17 (1999): 2287–91. http://dx.doi.org/10.1016/s0277-5387(99)00106-0.

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38

Lindner, Leonie, and Peter Klüfers. "Cobalt(III) Complexes ofD-Galactosylamine." Zeitschrift für anorganische und allgemeine Chemie 641, no. 11 (2015): 1869–73. http://dx.doi.org/10.1002/zaac.201500224.

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39

R., N. Prasad, and Upadhyay Ashish. "Chromium(III), iron(III) and cobalt(II) complexes of 14- and 16-membered tetraazamacrocycles." Journal of Indian Chemical Society Vol. 83, Sep 2006 (2006): 857–60. https://doi.org/10.5281/zenodo.5829746.

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Department of Chemistry, University of Rajasthan, Jaipur-302 004, Rajasthan, India <em>E-mail</em>: prasadraghunandan@yahoo.com <em>Manuscript received 12 December 2003, revised 3 April 2006, accepted 26 May 2006</em> 2+2 Cyclocondensation of 3,4-hexanedione with 1,3-diaminopropane or 1,4-diaminobutane in the presence of Cr<sup>III</sup>, Fe<sup>III </sup>and Co<sup>II</sup>as templates has yielded complexes of the types [ML(NO<sub>3</sub>)<sub>2</sub>]NO<sub>3</sub> and [CoL(NO<sub>3</sub>)<sub>2</sub>] [where M = Cr<sup>III</sup>, Fe<sup>III</sup> and L = 2,3,9,10- tetruethyl-1,4,8

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40

IBRAHIM, M. SIDAHMED, and M. ISMAIL AMEL. "Solvent Effect on the Aquation of Octahedral Cobalt(III) Complexes." Journal of Indian Chemical Society Vol. 65, May 1988 (1988): 324–28. https://doi.org/10.5281/zenodo.6298994.

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Chemistry Department, Faculty of Science, Alexandria University, Alexandria, Egypt <em>Manuscript received 20 March 1987, revised 12 January 1988, accepted 17 March 1988</em> The aquation of <em>trans</em>-[Co(3-Etpy)<sub>4</sub>Cl<sub>2</sub>]<sup>+</sup> and <em>trans</em>-[Co(4·Etpy)<sub>4</sub>CI<sub>2</sub>]<sup>+</sup> cations (Etpy=ethylpyridine) was studied in a wide range of water+acetonitrile and water+ dioxane mixtures at different temperatures. A non-linear relation obtained for the variation of log (rate constant) with the reciprocal of the dielectric constant, for both the

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41

Lallan, Mishra, and Pathak Brajesh. "Synthesis and spectroscopic characterization of cobalt(III) based supramolecular complexes bearing thymine and adenine." Journal of Indian Chemistry Society Vol. 78, October-December 2001 (2001): 643–48. https://doi.org/10.5281/zenodo.5893150.

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Department of Chemistry, Banaras Hindu University, Varanasi-221 005, India <em>E-mail</em> : lmishra@banaras.ernet.in  <em>Fax</em> : 91-542-368174 <em>Manuscipt received 2 April 2001</em> Multifunctional ligand S-cyano-6-(4-pyridyl)-2-thiouracil (L) possesing hydrogen bonding groups complementary to those found in nucleotide bases has been synthesized and complexed with <em>trans</em>-[Co(en)<sub>2</sub>Cl<sub>2</sub>]<sup>+</sup>Cl<sup>-</sup> (en= ethylene diamine) resulting into two types of complexes [Co(en)<sub>2</sub>LCI]<sup>2+</sup>.2CI<sup>-</sup> and [Co(en)<sub>2</sub>L<sub>2<

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42

Srivastava, Shilpi. "SYNTHESIS, SPECTROSCOPIC, THERMAL AND BIOLOGICAL STUDIES ON MANGANESE(III), IRON(III) AND COBALT(III) COMPLEXES WITH BIS(MERCAPTO AZOLES)." International Journal of Advanced Research 9, no. 11 (2021): 351–62. http://dx.doi.org/10.21474/ijar01/13750.

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Complexes of bis(mercapto azoles) i.e. bis(mercapto triazoles), bis(mercapto thiadiazoles) and bis(mercapto oxadiazoles) (LH2) with manganese(III), iron(III) and cobalt(III) have been prepared in methanol in the presence of sodium hydroxide and binuclear products of the type Na[M(L)2(H2O)2] have been isolated. Tentative structural conclusions are drawn for these complexes based upon elemental analyses, electrical conductance, magnetic moment and spectral (electronic, infrared and 1H NMR) data. The thermal stability and mode of decomposition for the complexes have been studied by TG, DTA and DS

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43

Hanack, Michael, та Carola Hedtmann-Rein. "Elektrisch leitfähiges μ-Cyano(tetrabenzoporphyrinato)cobalt(III)/ Electric Conductive Electric Conductive //-Cyano(tetrabenzoporphyrinato)cobalt(III)-Cyano(tetrabenzoporphyrinato)cobalt(III)". Zeitschrift für Naturforschung B 40, № 8 (1985): 1087–89. http://dx.doi.org/10.1515/znb-1985-0817.

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AbstractThe preparation of tetrabenzoporphyrinatocobalt(II) and tetrabenzoporphyrinatocobalt(III)- cyanide derivatives either with terminal or bridging cyanide is described. The IR and the 1H NMR spectra as well as magnetic measurements are in accordance with the proposed structures and the oxidation states of the complexes. μ-Cyano(tetrabenzoporphyrinato)cobalt(III) (4) exhibits a powder conductivity of σRT = 4 ·10-2 S/cm, without additional external doping.

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44

Nishiura, Toshiki, Takehiro Ohta, Takashi Ogura, Jun Nakazawa, Masaya Okamura, and Shiro Hikichi. "The Conversion of Superoxide to Hydroperoxide on Cobalt(III) Depends on the Structural and Electronic Properties of Azole-Based Chelating Ligands." Molecules 27, no. 19 (2022): 6416. http://dx.doi.org/10.3390/molecules27196416.

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Conversion from superoxide (O2‒) to hydroperoxide (OOH‒) on the metal center of oxygenases and oxidases is recognized to be a key step to generating an active species for substrate oxidation. In this study, reactivity of cobalt(III)-superoxido complexes supported by facially-capping tridentate tris(3,5-dimethyl-4-X-pyrazolyl)hydroborate ([HB(pzMe2,X)3]‒; TpMe2,X) and bidentate bis(1-methyl-imidazolyl)methylborate ([B(ImN-Me)2Me(Y)]‒; LY) ligands toward H-atom donating reagent (2-hydroxy-2-azaadamantane; AZADOL) has been explored. The oxygenation of the cobalt(II) precursors give the correspond

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45

Bond, AM, R. Colton, DR Mann, and JE Moir. "Characterization of Tris(Diselenocarbamato)Cobalt(III) and Pentakis(Diselenocarbamato)Dicobalt(III) Complexes by Electrochemical, Cobalt-59 N.M.R. and Mass-Spectrometric Techniques. Comparisons With Dithiocarbamate Analogs." Australian Journal of Chemistry 39, no. 9 (1986): 1385. http://dx.doi.org/10.1071/ch9861385.

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A series of Co(RR′dsc)3 and [Co2(RR′dsc)5]+ complexes (R, R′ = two alkyl groups or one heterocyclic group; dsc = NCSe2) have been synthesized and their redox behaviour, chemical reactivity and spectroscopic properties compared with the corresponding dithiocarbamate (RR′dtc) complexes. Electrochemical oxidation of Co(RR′dsc)3 in dichloromethane at platinum electrodes occurs at potentials about 0.34 V less positive than for Co(RR′dsc)3. The formally cobalt(IV) complexes [Co(RR′dsc)3]+ can be identified as a product which is then converted into [Co2(RR′dsc)5]+ via dimerization and an internal red

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46

ELHAM, MOHAMED ABDALLA, and RAFAT MAHMOUD MOHAMED. "Solution Equilibria of Cobalt(II)- and Nickel(II)- 2,2',2"-Terpyridine-Amino Acids Ternary Systems." Journal of Indian Chemical Society 72, Jan 1995 (1995): 13–17. https://doi.org/10.5281/zenodo.5900427.

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Chcmistry Department, Faculty of Science, Minia University, Minia, Egypt Chemistry Department, Faculty of Science, Assiut University, Assiut. Egypt <em>Manuscript received 30 July 1993, accepted 12 October 1993</em> Solution equilibria of the ternary systems Co<sup>II</sup>., Ni <sup>II</sup>-2,2',2"-terpyridine-mono- or dicarboxylic amino adds are investigated potentiometrically. The stability constants of the binary and ternary complexes are determined at 20° and ionic strength of 0.2 mol dm<sup>-3</sup> (NaCIO<sub>4</sub>). It is duduced that the stability of the ternary comple

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47

Ali-Mohamed, Ahmed Y. "Bacterial activity of cobalt(III) complexes. Part IV: Diethylenetriaminemonoacetatocobalt(III) complexes." Transition Metal Chemistry 16, no. 1 (1991): 14–17. http://dx.doi.org/10.1007/bf01127862.

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48

Ali-Mohamed, Ahmed Y., and M. �l-Khedri. "Studies on the bacterial activity of cobalt(III) complexes. Part I. Cobalt(III) amine complexes." Transition Metal Chemistry 13, no. 6 (1988): 434–36. http://dx.doi.org/10.1007/bf01043705.

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49

Ali-Mohamed, Ahmed Y., and Abdulla A. R. Abdulla. "Studies on the bacterial activity of cobalt(III) complexes. Part II. Cobalt(III) aminoacidato-complexes." Transition Metal Chemistry 14, no. 3 (1989): 181–84. http://dx.doi.org/10.1007/bf01043790.

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50

VIBHUTI, SRIVASTAVA, K. SRIVASTAVA S., and P. MISHRA A. "Complexes of Cobalt(II), Nickel(II) and Copper(II) Furfurylidene-Nicotinamide Schiff Base with." Journal of Indian Chemical Society Vol. 72, Jan 1995 (2022): 47–48. https://doi.org/10.5281/zenodo.5900462.

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<em>I</em>norganic Chemistry Laboratories, Chemistry Department, Dr. H. S. Gour University, Sagar-470 003 <em>Manuscript received 26 May 1993, revised 27 September 1993, accepted 14 October 1993</em> Complexes of Cobalt(II), Nickel(II) and Copper(II) Furfurylidene-Nicotinamide Schiff Base with

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