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Journal articles on the topic 'Cobalt(II) alkoxides'

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Published: 5 June 2025

Last updated: 1 August 2025

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1

Neetu, Agrawal, and Singh Anirudh. "Reactions of later 3d divalent transition metal chlorides with metal alkoxides and characterization of novel heterobimetallic alkoxide coordination compounds." Journal of Indian Chemical Society Vol. 84, Sep 2007 (2007): 856–60. https://doi.org/10.5281/zenodo.5826920.

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Department of Chemistry, University of Rajasthan, Jaipur-302 004, Rajasthan, India <em>E-mail </em>: anirudhsinghunivjpr@yahoo.co.in <em>Manuscript received 26 June 2007, accepted 27 June 2007</em> The interesting and somewhat unexpected solubilization of insoluble anhydrous divalent transition metal chlorides, MCI<sub>2</sub> (M = Co, Ni and Cu) in benzene in the presence of Ti(OEt)<sub>4</sub> or Zr(OPr<sup>i</sup>)<sub>4</sub> or AI(OPr<sup>i</sup>)<sub>3</sub> in 1 : 2 and 1 : 4 molar ratios, followed by usual workup yields quantitatively, novel complexes of the general formulae MM' <s

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2

Raj, Kumar Dubey. "Synthesis, reactions and characterization of some mixed ligand (phenoxo-alkoxoand acetylacetonato-) complexes of cobalt(II) derived from Schiff bases." Journal of Indian Chemical Society Vol. 83, Nov 2006 (2006): 1087–92. https://doi.org/10.5281/zenodo.5832300.

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Synthetic Inorganic & Metallo-Organic Research Laboratory, Department of Chemistry, University of Allahabad, Allahabad-211 002, Uttar Pradesh, India E-mail : rajalkoxy@yahoo.com <em>Manuscript received 28 February 2006, revised 1 August 2006, accepted 23 August 2006</em> Some novel complexes of cobalt(ll) of the type, [(μ-CI)<sub>2</sub>Co<sub>2</sub>{ƞ<sup>2</sup>-(sb)hl (1) and (2) and Co<sub>2</sub>{ƞ<sup>2</sup>-{sb)}<sub>2</sub>] (3) and (4) [where sb = Schiff base {salicylidene-2-methyl-1-aminobenzene (smabH) for (1 and 3) and salicylidene-2-aminopyridene {sapH) for {2 and 4)

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3

Neetu, Agrawal, and Singh Anirudh. "Synthesis, spectroscopic and magnetic properties of the first heterotrimetallic complexes of cobalt(II) featuring nonaalkoxodistannate or -dititanate ligands." Journal of Indian Chemical Society Vol. 84, Jun 2007 (2007): 532–37. https://doi.org/10.5281/zenodo.5820513.

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Department of Chemistry, University of Rajasthan, Jaipur-302 004, Rajasthan, India <em>E-mail</em> : anirudhsinghunivjpr@yahoo.co.in <em>Manuscript received 19 February 2006, revised 4 April 2007, accepted 9 April 2007</em> Novel heterotrimetallic alkoxides of the type [Co{M<sub>2</sub>(OR)<sub>9</sub>}{M'(OR')<sub>n</sub> }] [M=Sn, M'=AI (n = 4), R=R'=Pr<sup>j</sup> (1); M=Sn, M'=Nb (n=6), R=R'= Pr<sup>j</sup> (2); M=Ti, M'=AI (n=4), R=R' = Pr<sup>i</sup> (3); M=Ti, M'=Nb (n=6), R=R'=Pr<sup>i</sup> (4); M=Sn, M'=AI (n=4), R=R'=Et (5); M=Ti, M&#3

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4

Dubey, R. K., A. Singh, and R. C. Mehrotra. "Synthesis, reactions, spectral and magnetic studies of bimetallic alkoxides of cobalt(II) with zirconium(IV)." Inorganica Chimica Acta 118, no. 2 (1986): 151–56. http://dx.doi.org/10.1016/s0020-1693(00)81378-x.

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5

Garg, G., R. K. Dubey, A. Singh, and R. C. Mehrotra. "Synthetic, spectroscopic and magnetic studies of heterometal alkoxides of cobalt(II, nickel(II) and copper(II) containing the sterically crowded tetraalkoxoaluminate ligand." Polyhedron 10, no. 15 (1991): 1733–39. http://dx.doi.org/10.1016/s0277-5387(00)83793-6.

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6

Grass, Amanda, James A. Bellow, Gregory Morrison, Hans-Conrad zur Loye, Richard L. Lord, and Stanislav Groysman. "One electron reduction transforms high-valent low-spin cobalt alkylidene into high-spin cobalt(ii) carbene radical." Chemical Communications 56, no. 60 (2020): 8416–19. http://dx.doi.org/10.1039/d0cc03028g.

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7

Yamada, Tohru, and Tatsuyuki Tsubo. "Enantioselective Michael Addition Catalyzed by an Optically Active 1-Chlorovinyl Cobalt(III) Complex." Synlett 26, no. 08 (2015): 1111–15. http://dx.doi.org/10.1055/s-0034-1380265.

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The optically active 1-chlorovinyl cobalt(III) complex was prepared from the ketoiminatocobalt(II) complex upon treatment with sodium borohydride in the presence of 1,1,1-trichloroethane. The obtained complex was found to catalyze the enantioselective Michael addition of various malonates on cyclic or acyclic enones to afford the corresponding adduct. In this reaction, the use of sodium alkoxide as a base with 1-chlorovinyl cobalt(III) complex catalyst was crucial to improving both the reactivity and enantioselectivity.

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8

Bartyzel, Agata, Beata Cristóvão та Dariusz Osypiuk. "Bis(μ2-2,2′-((2-(hydroxy)propane-1,3-diyl)bis((nitrilo)eth-1-yl-1-ylidene))diphenolato)-dicobalt(III)". Molbank 2023, № 3 (2023): M1690. http://dx.doi.org/10.3390/m1690.

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A new cobalt(III) complex with a pentadentate Schiff base was synthesized using a reaction of 2,2′-{(2-hydroxypropane-1,3-diyl)bis(nitriloeth-1-yl-1-ylidene)}diphenol (H3L) and cobalt(II) acetate in a methanolic solution. This synthesis resulted in the isolation of dinuclear compound [CoIII2L2] (1), which was characterized using elemental analyses and XRF, FTIR, and TG/DSC techniques. The molecular structure of the complex was confirmed using single-crystal X-ray diffraction. The structure of 1 consists of a centrosymmetric dimer in which two crystallographically equivalent cobalt(III) ions ar

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9

Sigel, Gary A., Ruth A. Bartlett, David Decker, Marilyn M. Olmstead, and Philip P. Power. "Synthesis and spectroscopic and x-ray structural characterization and dynamic solution behavior of the neutral cobalt(II) alkoxides [Co{OC(C6H11)3}2]2.CH3OH.1/2C6H12.THF, [Co(OCPh3)2]2.n-C6H14, [Co(OSiPh3)2(THF)]2, and Co(OCPh3)2(THF)2." Inorganic Chemistry 26, no. 11 (1987): 1773–80. http://dx.doi.org/10.1021/ic00258a028.

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10

Wang, Peng, Glenn P. A. Yap, and Charles G. Riordan. "Iron(II)–alkoxide and –aryloxide complexes of a tris(thioether)borate ligand: synthesis, molecular structures, and implications on the origin of instability of their iron(II)–catecholate counterpart." Acta Crystallographica Section C Structural Chemistry 77, no. 9 (2021): 544–50. http://dx.doi.org/10.1107/s2053229621008500.

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The phenyltris[(tert-butylthio)methyl]borate ligand, [PhTt tBu], has been studied extensively as a platform for coordination, organometallic, and bioinorganic chemistry, especially with 3d metals. While [PhTt tBu]Co(3,5-DBCatH) (3,5-DBCatH is 3,5-di-tert-butylcatecholate), a CoII–monoanionic catecholate complex, was successfully isolated to model the active site of cobalt(II)-substituted homoprotocatechuate 2,3-dioxygenase (Co-HPCD) [Wang et al. (2019). Inorg. Chim. Acta, 488, 49–55], its iron(II) counterpart, [PhTt tBu]Fe(3,5-DBCatH), was not accessible via similar synthetic routes. Switching

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11

Pilichos, Evangelos, Evangelos Spanakis, Evangelia-Konstantina Maniaki, et al. "Diversity of Coordination Modes in a Flexible Ditopic Ligand Containing 2-Pyridyl, Carbonyl and Hydrazone Functionalities: Mononuclear and Dinuclear Cobalt(III) Complexes, and Tetranuclear Copper(II) and Nickel(II) Clusters." Magnetochemistry 5, no. 3 (2019): 39. http://dx.doi.org/10.3390/magnetochemistry5030039.

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Syntheses, crystal structures and characterization are reported for four new complexes [Cu4Br2(L)4]Br2 (1), [Ni4(NO3)2(L)4(H2O)](NO3)2 (2), [Co2(L)3](ClO4)3 (3) and [Co(L)2](ClO4) (4), where L− is the monoanion of the ditopic ligand N′-(1-(pyridin-2-yl)ethylidene)pyridine-2-carbohydrazide (LH) built on a picolinoyl hydrazone core fragment, and possessing a bidentate and a tridentate coordination pocket. The tetranuclear cation of 1·0.8H2O·MeOH is a strictly planar, rectangular [2 × 2] grid. Two 2.21011 L− ligands bridge adjacent CuII atoms on the short sides of the rectangle through their alko

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12

Latos-Grażyński, Lechosław, James Johnson, Saeed Attar, Marilyn M. Olmstead, and Alan L. Balch. "Reactivity of the Verdoheme Analogues, 5-Oxaporphyrin Complexes of Cobalt(II) and Zinc(II), with Nucleophiles: Opening of the Planar Macrocycle by Alkoxide Addition To Form Helical Complexes†." Inorganic Chemistry 37, no. 18 (1998): 4493–99. http://dx.doi.org/10.1021/ic971584h.

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13

Greener, Bryan, and Paul H. Walton. "Catalytic decomposition of dialkyl pyrocarbonates to dialkyl carbonates and carbon dioxide in dichloromethane by a discrete cobalt(II) alkoxide species generated in situ †." Journal of the Chemical Society, Dalton Transactions, no. 20 (1997): 3733–40. http://dx.doi.org/10.1039/a705144a.

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14

Dubey, R. K., A. Singh, and R. C. Mehrotra. "Preparation and physico-chemical studies of some chloride and alkoxide isopropoxymetallates of cobalt(II) containing {Al(OPri)4}−, {Zr2(OPri)9}− and {M(OPri)6}− Units (M = Nb or Ta)." Inorganica Chimica Acta 143, no. 2 (1988): 169–75. http://dx.doi.org/10.1016/s0020-1693(00)83685-3.

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15

Olmstead, Marilyn M., Philip P. Power, and Gary Sigel. "Mononuclear cobalt(II) complexes having alkoxide and amide ligands: synthesis and x-ray crystal structures of [Co(Cl)(OC-tert-Bu3)2.Li(THF)3], [Li(THF)4.5][Co{N(SiMe3)2}(OC-tert-Bu3)2], and [Li{Co(N(SiMe3)2)(OC-tert-Bu3)2}]." Inorganic Chemistry 25, no. 7 (1986): 1027–33. http://dx.doi.org/10.1021/ic00227a029.

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16

DUBEY, R. K., A. SINGH, and R. C. MEHROTRA. "ChemInform Abstract: Synthesis, Reactions, Spectral and Magnetic Studies of Bimetallic Alkoxides of Cobalt(II) with Zirconium(IV)." ChemInform 18, no. 4 (1987). http://dx.doi.org/10.1002/chin.198704260.

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17

Ali Issa, Mohamed Yousef, and Gül Yilmaz Atay. "Investigation of Morphology and Structure of Cobalt Oxide (Co<sub>3</sub>O<sub>4</sub>) and Barium Hexaferrite (BaFe<sub>12</sub>O<sub>19</sub>) Synthesized by Sol-Gel." Fine Chemical Engineering, March 14, 2025, 124–38. https://doi.org/10.37256/fce.6120256206.

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Sol-gel, which can generally be defined as a chemical process in which small molecules of metal alkoxides are used to produce solid materials, is an important nanomaterial synthesis method that has become very popular recently. Objects with different geometries can be coated homogeneously, and pure powders and thin films can be prepared at low temperatures, also attracting attention with its low cost compared to other production methods. In this study, the synthesis of cobalt oxide (Co3O4) and barium hexaferrite (BaFe12O19), which are mostly used in the defence industry for applications such a

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18

Li, Chuhan, Shuo Song, Yuling Li, et al. "Selective hydroboration of unsaturated bonds by an easily accessible heterotopic cobalt catalyst." Nature Communications 12, no. 1 (2021). http://dx.doi.org/10.1038/s41467-021-24117-5.

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AbstractHomogeneous earth-abundant metal catalysis based on well-defined molecular complexes has achieved great advance in synthetic methodologies. However, sophisticated ligand, hazardous activator and multistep synthesis starting from base metal salts are generally required for the generation of active molecular catalysts, which may hinder their broad application in large scale organic synthesis. Therefore, the development of metal cluster catalysts formed in situ from simple earth-abundant metal salts is of importance for the practical utilization of base metal resource, yet it is still in

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19

Mills, L. Reginald, Francesca DiMare, David Gygi, et al. "Phenoxythiazoline (FTz)‐Cobalt(II) Precatalysts Enable C(sp2)‐C(sp3) Bond Formation for Key Intermediates in the Synthesis of Toll‐like Receptor 7/8 Antagonists." Angewandte Chemie International Edition, November 2, 2023. http://dx.doi.org/10.1002/anie.202313848.

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Evaluation of the relative rates of the cobalt‐catalyzed C(sp2)–C(sp3) Suzuki–Miyaura cross‐coupling between the neopentylglycol ester of 4‐fluorophenylboronic acid and N‐Boc‐4‐bromopiperidine established that decreasing the size of the N‐alkyl substituents on the phenoxyimine (FI) supporting ligand accelerated the overall rate of the reaction. This trend inspired the design of optimal cobalt catalysts with phenoxyoxazoline (FOx) and phenoxythiazoline (FTz) ligands. An air‐stable cobalt(II) precatalyst, (FTz)CoBr(py)3 was synthesized and applied to the cross‐coupling of an indole‐5‐boronic est

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20

Mills, L. Reginald, Francesca DiMare, David Gygi, et al. "Phenoxythiazoline (FTz)‐Cobalt(II) Precatalysts Enable C(sp2)‐C(sp3) Bond Formation for Key Intermediates in the Synthesis of Toll‐like Receptor 7/8 Antagonists." Angewandte Chemie, November 2, 2023. http://dx.doi.org/10.1002/ange.202313848.

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Evaluation of the relative rates of the cobalt‐catalyzed C(sp2)–C(sp3) Suzuki–Miyaura cross‐coupling between the neopentylglycol ester of 4‐fluorophenylboronic acid and N‐Boc‐4‐bromopiperidine established that decreasing the size of the N‐alkyl substituents on the phenoxyimine (FI) supporting ligand accelerated the overall rate of the reaction. This trend inspired the design of optimal cobalt catalysts with phenoxyoxazoline (FOx) and phenoxythiazoline (FTz) ligands. An air‐stable cobalt(II) precatalyst, (FTz)CoBr(py)3 was synthesized and applied to the cross‐coupling of an indole‐5‐boronic est

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21

SIGEL, G. A., R. A. BARTLETT, D. DECKER, M. M. OLMSTEAD, and P. P. POWER. "ChemInform Abstract: Synthesis and Spectroscopic and X-Ray Structural Characterization and Dynamic Solution Behavior of the Neutral Cobalt(II) Alkoxides (Co(OC(C6H11)3)2)2·CH3OH·1/2C6H12·THF, (Co(OCPh3)2)2·n-C6H14, (Co(OSiPh3)2(THF))2, and Co(OCPh3)2(THF)." ChemInform 18, no. 41 (1987). http://dx.doi.org/10.1002/chin.198741294.

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22

DUBEY, R. K., A. SINGH, and R. C. MEHROTRA. "ChemInform Abstract: Preparation and Physico-Chemical Studies of Some Chloride and Alkoxide Isopropoxymetallates of Cobalt(II) Containing (Al(OiPr)4)-, (Zr2(OiPr)9)- and (M(OiPr)6)- Units (M: Nb or Ta)." ChemInform 19, no. 26 (1988). http://dx.doi.org/10.1002/chin.198826268.

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23

OLMSTEAD, M. M., P. P. POWER, and G. SIGEL. "ChemInform Abstract: Mononuclear Cobalt(II) Complexes Having Alkoxide and Amide Ligands: Synthesis and X-Ray Crystal Structures of [Co(Cl)(OC-tBu3)2·Li(THF)3], [Li(THF)4{Co(N(SiMe3)2)(OCBu3)2}], and [Li{Co(N(SiMe3)2)(OC-tBu3)2}]." Chemischer Informationsdienst 17, no. 31 (1986). http://dx.doi.org/10.1002/chin.198631286.

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