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Journal articles on the topic 'Planar Complexes of Platinum(Il)'

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Published: 5 June 2025

Last updated: 1 August 2025

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1

Poirier, Stéphanie, Christian Reber, and Pierre Libioulle. "Temperature / pressure-dependent luminescence spectra of square-planar complexes." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C1714. http://dx.doi.org/10.1107/s2053273314082850.

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Luminescence properties of square-planar complexes of platinum(II) and palladium(II) with a d8 electron configuration were investigated. Blue shift of the maxima of the luminescence spectra occur for pressure-dependent spectra of several complexes of both metals. This is due to a structural compression of the crystalline lattice, which causes a destabilization of the LUMO orbital for theses complexes. Other structural changes can also occur, providing a more important slope of the blue shift. Also, intermolecular interactions cause a red shift in pressure-dependent spectra. In temperature-depe

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2

Soliman, Ahmed A., Fawzy A. Attaby, Othman I. Alajrawy, Azza A. A. Abou-hussein, and Wolfgang Linert. "New Platinum (II) Ternary Complexes of Formamidine and Pyrophosphate: Synthesis, Characterization and DFT Calculations and In vitro Cytotoxicity." Combinatorial Chemistry & High Throughput Screening 23, no. 7 (2020): 611–23. http://dx.doi.org/10.2174/1386207323666200218115700.

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Aim and Objective: Platinum (II) and platinum (IV) of pyrophosphate complexes have been prepared and characterized to discover their potential as antitumor drugs. This study was conducted to prepare and characterize new ternary platinum (II) complexes with formamidine and pyrophosphate as an antitumor candidate. Materials and Methods: The complexes have been characterized by mass, infrared, UV-Vis. spectroscopy, elemental analysis, magnetic susceptibility, thermal analyses, and theoretical calculations. They have been tested for their cytotoxicity, which was carried out using the fastcolorimet

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3

Bridgeman, Adam J., and Malcolm Gerloch. "Ligand fields in planar platinum(II) complexes." Journal of the Chemical Society, Dalton Transactions, no. 2 (1995): 197. http://dx.doi.org/10.1039/dt9950000197.

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4

Poirier, Stéphanie, Feriel Rahmani, and Christian Reber. "Large d–d luminescence energy variations in square-planar bis(dithiocarbamate) platinum(ii) and palladium(ii) complexes with near-identical MS4 motifs: a variable-pressure study." Dalton Transactions 46, no. 16 (2017): 5279–87. http://dx.doi.org/10.1039/c7dt00545h.

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A surprising variation of luminescence maxima occurs for crystalline dithiocarbamate platinum(ii) complexes with very similar square-planar coordination geometries but different peripheral substituents R, R′.

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5

Geng, Hao, Kaijun Luo, Guo Zou, et al. "New phosphorescent platinum(ii) complexes: lamellar mesophase and mechanochromism." New Journal of Chemistry 40, no. 12 (2016): 10371–77. http://dx.doi.org/10.1039/c6nj02585d.

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Several new square planar platinum(ii) complexes based on modified 2-phenylpyridine derivatives as the main ligand and picolinic acid as the auxiliary ligand were synthesized and their photophysical properties, and mechanochromic and liquid crystalline behavior were investigated.

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6

Yang, Jing, Lili Sun, Liang Hao, et al. "A halogen ion-selective phosphorescence turn-on probe based on induction of Pt–Pt interactions." Chemical Communications 55, no. 75 (2019): 11191–94. http://dx.doi.org/10.1039/c9cc05093k.

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7

Fukuda, Keito, Tomoaki Sugaya та Koji Ishihara. "Crystal structure of [5-bromo-2-(pyridin-2-yl-κN)phenyl-κC1](pentane-2,4-dionato-κ2O,O′)platinum(II)". Acta Crystallographica Section E Crystallographic Communications 71, № 10 (2015): 1259–61. http://dx.doi.org/10.1107/s2056989015017478.

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The title cyclometalated platinum(II) complex with 2-(4-bromophenyl)pyridinato and acetylacetonato ligands, [Pt(C11H7BrN)(C5H7O2)], consists of two crystallographically non-equivalent dimers, each stacked by π–π interactions with distances of ≃ 3.4 Å. In both dimers, the platinum(II) complexes are arranged antiparallel to each other. Each complex exhibits a slightly distorted square-planar coordination environment around the central Pt(II) atom. The dihedral angles between two chelate rings including the PtIIatom in these complexes are 0.08 (12) and 1.54 (9)°.

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8

B., Keshavan, and Gowda Kempe. "Synthesis of square-planar palladium(II) and platinum(II) complexes with N-alkylphenothiazines." Journal of Indian Chemical Society Vol. 78, Jan 2001 (2001): 37–38. https://doi.org/10.5281/zenodo.5849937.

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Department of Studies in Chemistry, University of Mysore, Mysore-570 006, India <em>Manuscript received 14 February 2000. revised 6 July 2000, accepted 8 September 2000</em> Six square-planar complexes with general formula MLCl<sub>2</sub> [M = Pd<sup>II</sup> or Pt<sup>II</sup> and L = methoxypromazine (MP), prochloroperzine- (PCP) or butaperazine (BP) have been synthesised in ethanol medium.<em>N-</em>Aikylphcnothiazines act as bidentate ligands, the heterocyclic sulfur and tertiary nitrogen of the chain being the sites of coordination.

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9

Ali A. K. Al-Jibori, Subhi A. M. Al-Jibori, and Ahmed S. M. Al-Janabi. "Palladium(II) and platinum(II) mixed ligand complexes of metronidazole and saccharinate or benzisothiazolinonate ligands, synthesis and spectroscopic investigation." Tikrit Journal of Pure Science 24, no. 6 (2019): 26–32. http://dx.doi.org/10.25130/tjps.v24i6.432.

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Six palladium (II) and platinum (II) mixed ligand complexes of metronidazole (mnz) and saccharinate (sac) or benzothiazolinolate (bit) complexes of the type [ML2(mnz)2], M = Pd or Pt, L = sac or bit, have been prepared in moderate to high yield. The newly prepared complexes have been characterized by elemental (C,H,N,S) analysis, conductivity measurements, infrared and 1H-NMR spectra. Characterization data showed that the mnz ligand in all of the prepared complexes is coordinated to metal center through the imidazole nitrogen atom. The (sac) anion ligand is coordinated through the endocyclic n

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10

Samha, Hussein, and M. Keith De Armond. "Langmuir-blodgett (LB) of transition metal complexes square planar platinum(II) complexes." Coordination Chemistry Reviews 111 (December 1991): 73–81. http://dx.doi.org/10.1016/0010-8545(91)84011-s.

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11

Goodwin, HA, D. Onggo, BW Skelton, and AH White. "Coordination of 3,3'-Bipyridazine With Bivalent Copper, Palladium and Platinum." Australian Journal of Chemistry 43, no. 11 (1990): 1919. http://dx.doi.org/10.1071/ch9901919.

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Bis ( ligand ) complexes of the diimine 3,3′-bipyridazine (L) with bivalent copper, palladium and platinum are described. Green and violet forms of [CuL2] [BF4]2 were obtained, and the electronic and vibrational spectra suggest coordinated fluoroborate groups in the violet species. In the green complex a tetragonal structure is indicated. Coordination of perchlorate in [PdL2] [ClO4]2 is also indicated but not in [PtL2] [ClO4]2. Structure determination of the latter complex reveals a strictly planar PtN4 moiety, and in fact the whole complex cation is approximately planar. Reduced interligand r

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12

Annunziata, Alfonso, Davide Liberti, Emiliano Bedini, et al. "Square-Planar vs. Trigonal Bipyramidal Geometry in Pt(II) Complexes Containing Triazole-Based Glucose Ligands as Potential Anticancer Agents." International Journal of Molecular Sciences 22, no. 16 (2021): 8704. http://dx.doi.org/10.3390/ijms22168704.

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This article describes the synthesis, characterization, and biological activity of novel square-planar cationic platinum(II) complexes containing glucoconjugated triazole ligands and a comparison with the results obtained from the corresponding five-coordinate complexes bearing the same triazole ligands. Stability in solution, reactivity with DNA and small molecules of the new compounds were evaluated by NMR, fluorescence, and UV–vis absorption spectroscopy, together with their cytotoxic action against pairs of immortalized and tumorigenic cell lines. The results show that the square-planar sp

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13

Dodoff, Nicolay I. "Palladium(II) and Platinum(II) Complexes of N-3-Pyridinylmethanesulfonamide." Zeitschrift für Naturforschung B 56, no. 11 (2001): 1217–26. http://dx.doi.org/10.1515/znb-2001-1118.

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The complexes cis-[Pd(PMSA)2Cl2] cis-[Pt(PMSA)2X2], trans-[Pt(PMSA)2I2] and [Pt(PMSA)4]Cl2 (PMSA = N-3-pyridinylmethanesulfonamide; X = Cl, Br, I) have been synthesized and characterized by elemental analysis, molar electric conductivity, IR and 1H NMR spectra. A detailed assignment of the IR spectra (4000-150 cm-1) of the complexes, supported by an approximate normal coordinate analysis, has been performed. The complexes are of square-planar type and the PMSA ligand is coordinated via the pyridine nitrogen atom.

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14

Al-Jibori1, Ali A. K., Subhi A. M. Al-Jibori1, and Ahmed S. M. Al-Janabi2. "Palladium(II) and platinum(II) mixed ligand complexes of metronidazole and saccharinate or benzisothiazolinonate ligands, synthesis and spectroscopic investigation." Tikrit Journal of Pure Science 24, no. 6 (2019): 26. http://dx.doi.org/10.25130/j.v24i6.883.

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Six palladium (II) and platinum (II) mixed ligand complexes of metronidazole (mnz) and saccharinate (sac) or benzothiazolinolate (bit) complexes of the type [ML2(mnz)2], M = Pd or Pt, L = sac or bit, have been prepared in moderate to high yield. The newly prepared complexes have been characterized by elemental (C,H,N,S) analysis, conductivity measurements, infrared and 1H-NMR spectra. Characterization data showed that the mnz ligand in all of the prepared complexes is coordinated to metal center through the imidazole nitrogen atom. The (sac) anion ligand is coordinated through the endocyclic n

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15

Kuyuldar, Seher, Clemens Burda, and William B. Connick. "Tuning two-electron transfer in terpyridine-based platinum(ii) pincer complexes." RSC Advances 9, no. 37 (2019): 21116–24. http://dx.doi.org/10.1039/c9ra03939b.

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Square planar Pt(ii) terpyridine complexes with pincer ligands undergo two-electron oxidation and variation in the ligand substituents allows for tuning of the two-electron oxidation process over a 260 mV range.

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16

Durgadas, Mukherjee, and Nath Das Soumendra. "Design, synthesis and spectral characterization of chelates of PdII , PtII and RhIII with 6-guanidino-2,4-dimethyl-3,5-diazine and 6-phenyl guanidino-2,4-dimethyl3,5-diazine-potentialligands with biological interest." Journal of Indian Chemical Society Vol. 85, Jan 2008 (2008): 148–52. https://doi.org/10.5281/zenodo.5808696.

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Department of Chemistry, Mahadevananda Mahavidyalaya, Monirampur, Barrackpore, Kolkata-700 120, India <em>E-mail:</em> durgadas.mukherjee@gmail.com <em>Manuscript received 18 July 2007, revised 7 November 2007, accepted 19 November 2007</em> Complexes of 6-guanidino-2,4-dimethyl-3,5-diazine and 6-phenyl guanidino-2,4-dimethyl-3,5-diazine with Pd<sup>II</sup>, Pt<sup>II</sup> and Rh<sup>III</sup> have been reported. Complexes have been characterised on the basis of analytical, magnetic and spectral characterization and powder diffraction studies. Crystal field parameters have also been calculat

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17

D., Banerjea. "A note on the stoichiometric mechanism for ligand replacement reactions of square-planar complexes of platinum(II)." Journal of Indian Chemical Society Vol. 92, Aug 2015 (2015): 1319–20. https://doi.org/10.5281/zenodo.5599163.

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Former, Sir Rashbehary Ghose Professor of Chemistry, Calcutta University <em>E-mail</em> : banerjeas2005@yahoo.co.in <em>Manuscript received 15 June 2015, accepted 22 June 2015</em> Based on available evidence in literature, particularly insensitivity of the rate on the overall charge on the complex, ligand replacement reactions of square-planar complexes of platinum(II) are best regarded as interchange (<em>I</em>) process in which bond formation and bond dissociation make comparable contributions in generating the transition state. But for isoelectronic gold(III) the reactions are associativ

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18

Yamamura, M., H. Takizawa, Y. Gobo та T. Nabeshima. "Stable neutral radicals of planar N2O2-type dipyrrin platinum complexes: hybrid radicals of the delocalized organic π-orbital and platinum d-orbital". Dalton Transactions 45, № 16 (2016): 6834–38. http://dx.doi.org/10.1039/c5dt05039a.

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19

Maulana, Ilham Maulana Ilham, Peter Loennecke Peter Loennecke, and Evamarie Hey-Hawkins Evamarie Hawkins. "Platinum Metal Complexes of Carbaboranylphophines: Potential Anti Cancer Agents." Indonesian Journal of Cancer Chemoprevention 1, no. 1 (2010): 1. http://dx.doi.org/10.14499/indonesianjcanchemoprev1iss1pp1-11.

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Polyhedral heteroboranes in particular dicarba-closo-dodecaboranes(12) and their organic derivatives have been the subject of intense research for over 40 years due to their unique chemical and physical properties. The initial attraction to dicarba-closo-dodecaboranes(12) In the medicinal chemistry research, was a result of their high boron content and stability to catabolism, which are important criteria for cancer therapy, such as BNCT (boron neutron capture therapy) agents. The coordination compounds of the platinum group metals have also received large interest for their potential applicat

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20

R.N., PANDEY, KUMAR ARUN, S. P. SINGH R., N. SAHAY A., and KANT KUMAR SHASHI. "Some Low-valent Organometallic Complexes of Palladium(o), Platinum(o) and Rhodium(I)." Journal of Indian Chemical Society Vol. 69, Dec 1992 (1992): 804–6. https://doi.org/10.5281/zenodo.6017809.

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P. G. Centre of Chemistry (M. U.), College of Commerce, Patna-800 020 <em>Manuscript received 19 January 1992, revised 6 July 1992, accepted 25 August 1992</em> Some low-valent organometallic complexes of Pd<sup>0</sup>, Pt<sup>0</sup> and Rh<sup>I</sup> have been prepared and their tentative structure are assigned using various physicochemical data All Pd<sup>O</sup> and Pt<sup>O</sup> compounds are tetrahedral but compounds of Int have square planar configuration. Oxidation state of metals in these compounds are determined iodometrically. The ligand 3-(4 pyridyl) 4-phenyl

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21

Cuevas-Chávez, Cynthia A., Julio Zamora-Moreno, Miguel A. Muñoz-Hernández, Christian Bijani, Sylviane Sabo-Etienne, and Virginia Montiel-Palma. "Stabilization of Trans Disilyl Coordination at Square-Planar Platinum Complexes." Organometallics 37, no. 5 (2017): 720–28. http://dx.doi.org/10.1021/acs.organomet.7b00566.

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22

van Leeuwen, Piet W. N. M., Cees F. Roobeek, and Harry van der Heijden. "Migration Versus Insertion in Square-Planar Platinum and Palladium Complexes." Journal of the American Chemical Society 116, no. 26 (1994): 12117–18. http://dx.doi.org/10.1021/ja00105a088.

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23

Sacksteder, LouAnn, Eduardo Baralt, B. A. DeGraff, C. M. Lukehart, and J. N. Demas. "Site-selective spectroscopy of luminescent square-planar platinum(II) complexes." Inorganic Chemistry 30, no. 11 (1991): 2468–76. http://dx.doi.org/10.1021/ic00011a004.

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24

Coyer, M. J., M. Croft, J. Chen, and R. H. Herber. "Ligand isomerism and stacking in square planar platinum(II) complexes." Inorganic Chemistry 31, no. 10 (1992): 1752–57. http://dx.doi.org/10.1021/ic00036a006.

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25

Komine, Nobuyuki, Tomoko Ishiwata, Jun-ya Kasahara, Erino Matsumoto, Masafumi Hirano, and Sanshiro Komiya. "Synthesis and organic group transfer of organodiplatinum complex with a 1,2-bis(diphenylphosphino)ethane ligand." Canadian Journal of Chemistry 87, no. 1 (2009): 176–82. http://dx.doi.org/10.1139/v08-111.

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A series of homometallic alkyl- and phenyldinuclear complexes containing one platinum–platinum bond, (dppe)RPt–Pt(η5-Cp)(CO) (R = Me, Et, CH2CMe3, Ph), have been prepared by oxidative addition of the Pt–C bond of PtR(η5-Cp) to Pt(styrene)(dppe), and were characterized by spectroscopic methods and (or) X-ray structure analysis. The geometry at Pt with a dppe ligand is square planar, and the carbonyl and Cp ligand of the Pt(η5-Cp)(CO) moiety lie orthogonal to the coordination plane of former platinum. Competitive organic group transfer reactions along the Pt–Pt bond in these complexes took place

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26

Fazary, Ahmed E., Yi-Hsu Ju, Ayed S. Al-Shihri, et al. "Platinum and vanadate Bioactive Complexes of Glycoside Naringin and Phenolates." Open Chemistry 15, no. 1 (2017): 189–99. http://dx.doi.org/10.1515/chem-2017-0022.

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AbstractPlatinum(II) and vanadium(V) solid binary and ternary complexes involving naringin, a flavanone glycoside in found in grapefruit, and some phenolic acids were synthesized and fully characterized using detailed structural and spectroscopic analysis techniques such as IR, NMR, and SEM techniques. The magnetic susceptibility results as well line drawings of the platinum and vanadium complexes showed four-coordinate square-planar and remarkable low-spin diamagnetic species; which is in agreement with the structures proposed. The cytotoxic activities of the binary and ternary vanadium and p

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27

Fischer, Axel, Ion Neda, Peter G. Jones, and Reinhard Schmutzler. "Darstellung und Kristallstrukturen einiger Übergangsmetall-Komplexverbindungen mit Liganden mit dem 4,5-Benzo-3-methyl-1,3,2-oxazaphosphorinan-6-on-Gerüst / Synthesis and X-Ray Crystal Structures of Some Transition-Metal Complexes Involving Ligands with the 4,5-Benzo-3-methyl-1,3,2-oxazaphosphorinan-6-one Framework." Zeitschrift für Naturforschung B 49, no. 11 (1994): 1481–93. http://dx.doi.org/10.1515/znb-1994-1106.

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4,5-Benzo-2-diethylamino-3-methyl-1,3,2-oxazaphosphorinan-6-one 1 and 4,5-benzo-2-[bis- (2-chlorethyl)amino]-3-methyl-1,3,2-oxazaphosphorinan-6-one 3 reacted with dichloro- (cycloocta-1,5-diene)platinum(II) [(COD)PtCl2] to give the ds-dichloro-platinum(II) complexes 2 and 4, respectively. The reaction of 1 with tricarbonyl(cycloheptatriene)molybdenum(0) led to a mixture of isomers including fac-tris-(4,5-benzo-2-diethylamino-3-methyl- 1,3,2-oxazaphosphorinan-6-one)tricarbonylmolybdenum(0) 5. The reaction of 4,5-benzo- 2-acetylamino-3-methyl-1,3,2-oxazaphosphorinan-6-one 6 with dichloro(cycloo

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28

Ortuño, Manuel A., Salvador Conejero, and Agustí Lledós. "True and masked three-coordinate T-shaped platinum(II) intermediates." Beilstein Journal of Organic Chemistry 9 (July 9, 2013): 1352–82. http://dx.doi.org/10.3762/bjoc.9.153.

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Although four-coordinate square-planar geometries, with a formally 16-electron counting, are absolutely dominant in isolated Pt(II) complexes, three-coordinate, 14-electron Pt(II) complexes are believed to be key intermediates in a number of platinum-mediated organometallic transformations. Although very few authenticated three-coordinate Pt(II) complexes have been characterized, a much larger number of complexes can be described as operationally three-coordinate in a kinetic sense. In these compounds, which we have called masked T-shaped complexes, the fourth position is occupied by a very we

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29

Carmona-Negrón, José A., Mayra E. Cádiz, Curtis E. Moore, Arnold L. Rheingold, and Enrique Meléndez. "New platinum(II) complexes with benzothiazole ligands." Acta Crystallographica Section E Crystallographic Communications 72, no. 3 (2016): 412–16. http://dx.doi.org/10.1107/s2056989016002826.

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Four new platinum(II) complexes, namely tetraethylammonium tribromido(2-methyl-1,3-benzothiazole-κN)platinate(II), [NEt4][PtBr3(C8H7NS)] (1), tetraethylammonium tribromido(6-methoxy-2-methyl-1,3-benzothiazole-κN)platinate(II), [NEt4][PtBr3(C9H9NOS)] (2), tetraethylammonium tribromido(2,5,6-trimethyl-1,3-benzothiazole-κN)platinate(II), [NEt4][PtBr3(C10H11NS)] (3), and tetraethylammonium tribromido(2-methyl-5-nitro-1,3-benzothiazole-κN)platinate(II), [NEt4][PtBr3(C8H6N2O2S)] (4), have been synthesized and structurally characterized by single-crystal X-ray diffraction techniques. These species ar

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30

Melník, Milan, Peter Mikuš, and Clive Edward Holloway. "Platinum organometallic complexes: classification and analysis of crystallographic and structural data for dimeric complexes." Reviews in Inorganic Chemistry 34, no. 1 (2014): 25–90. http://dx.doi.org/10.1515/revic-2013-0010.

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AbstractThis review covers over 260 examples of dimeric organoplatinum complexes. Platinum is predominantly found in the oxidation states +2 and +4, but with some examples of 0, +1, +2.5, +3, and of mixed-valence as well. A number of coordination state geometries are observed, of which the most common is essentially square-planar at Pt(II), a distorted octahedral at Pt(IV), and some examples of trigonal planar and trigonal bipyramidal as well. The most common ligands are methyl (Me), carbonyl and PX3. The shortest Pt-Pt bond distance is 245.1(1) pm. The mean Pt-Pt bond distance increases in th

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31

Öğütçü, Hatice, Nurdan K. Yetim, Elvan H. Özkan, et al. "Nanospheres caped Pt(II) and Pt (IV): synthesis and evaluation as antimicrobial and Antifungal Agent." Polish Journal of Chemical Technology 19, no. 1 (2017): 74–80. http://dx.doi.org/10.1515/pjct-2017-0011.

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Abstract Antimicrobial and antifungal polymers are gaining the attention of pharmaceutical makers and industrial design. Nanospheres-Polymers attached Platinum(II) / (IV) complexes have been synthesized to investigate antimicrobial activities. Firstly, nanospheres involving Schiff bases were synthesized from (aminomethyl) polystyrene and four substitute salicylaldehyde (2-hydroxy benzaldehyde, 5-fluoro-2-hydroxy benzaldehyde, 5-kloro-2-hydroxy benzaldehyde, 5-bromo-2-hydroxy benzaldehyde). Secondly, polymers attached Platinum(II) / (IV) complexes have been prepared by means of template method.

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32

Irshad, Ali, and D. Singh P. "Synthesis and characterisation of palladium(II) and platinum(II) complexes with triphenylphosphine sulphide and triphenylstibine." Journal of Indian Chemical Society Vol. 85, Apr 2008 (2008): 440–42. https://doi.org/10.5281/zenodo.5815006.

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Department of Chemistry, B. N. College, Patna University, Patna-800 004, Bihar, India <em>Manuscript received 8 August 2007, revised 7 January 2008, accepted 8 January 2008</em> The complexes of palladium(II) and platinum(ll) with triphenylphosphine sulphide (Ph<sub>3</sub>PS) and triphenylstibine (Ph<sub>3</sub>Sb) of composition [ML<sub>2</sub>X<sub>2</sub>] (M = Pd<sup>II</sup>, Pt<sup>II</sup> ; L = Ph<sub>3</sub>PS or Ph<sub>3</sub>Sb and X = CI, Br, I or SCN) have been prepared and characterized. The triphenylstibine sulphide complexes like former ligand could not be isolated as the liga

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33

Jean, Stéphanie, Kevin Cormier, Alyssa E. Patterson, et al. "Synthesis, characterization, and anticancer properties of organometallic Schiff base platinum complexes." Canadian Journal of Chemistry 93, no. 10 (2015): 1140–46. http://dx.doi.org/10.1139/cjc-2015-0157.

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A small family of organometallic platinum complexes containing a chloride, cis-cyclooctene, and a Schiff base ligand have been prepared and characterized fully. Three aliphatic amines and four aromatic amines were chosen as representative examples. All complexes were stable in air except for 7, derived from the pinacol-protected 4-aminophenylboronate ester 4-H2NC6H4Bpin (pin = 1,2-O2C2Me4), which decomposed via B–C bond cleavage. Both complexes 4 (derived from aniline) and 7 were further characterized by single-crystal X-ray diffraction studies and confirmed the square planar nature of the pla

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34

Ferraro, Giarita, Tiziano Marzo, Maria Cucciolito, Francesco Ruffo, Luigi Messori, and Antonello Merlino. "Reaction with Proteins of a Five-Coordinate Platinum(II) Compound." International Journal of Molecular Sciences 20, no. 3 (2019): 520. http://dx.doi.org/10.3390/ijms20030520.

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Stable five-coordinate Pt(II) complexes have been highlighted as a promising and original platform for the development of new cytotoxic drugs. Their interaction with proteins has been scarcely studied. Here, the reactivity of the five-coordinate Pt(II) compound [Pt(I)(Me) (dmphen)(olefin)] (Me = methyl, dmphen = 2,9-dimethyl-1,10-phenanthroline, olefin = dimethylfumarate) with the model proteins hen egg white lysozyme (HEWL) and bovine pancreatic ribonuclease (RNase A) has been investigated by X-ray crystallography and electrospray ionization mass spectrometry. The X-ray structures of the addu

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35

Karmakar, Parnajyoti. "Influence of σ Donation and π Acceptance Properties of Spectator Ligands on Substitution Reactions in Bifunctional Mononuclear Platinum(II) Complexes: Exploring Reactivity Pattern of Antitumor Compound". Chemistry & Chemical Technology 19, № 1 (2025): 20–33. https://doi.org/10.23939/chcht19.01.020.

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Kinetics and mechanism of ligand substitution reactions on square planar platinum (II) complexes have been explored continuously over the last few decades. This was after the fortuitous discovery of the antiproliferative activity of cisplatin by Barnett Rosenberg in 1965, which attracted much attention from various other investigators to design new Pt(II) drugs with better activity and fewer side effects. Cisplatin's clinical success as a chemotherapeutic drug has promoted the discovery of succeeding generations with efficacy and less toxicity. The focal aim of these investigations was based o

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36

Goshe, Andrew J., Ian M. Steele, and B. Bosnich. "Supramolecular Recognition. Terpyridyl Palladium and Platinum Molecular Clefts and Their Association with Planar Platinum Complexes." Journal of the American Chemical Society 125, no. 2 (2003): 444–51. http://dx.doi.org/10.1021/ja028910z.

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37

Kushev, Daniel, Emilya Naydenova, Julita Popova, Liliana Maneva, Konstantin Grancharov, and Nadejda Spassovska. "Synthesis and Cytotoxicity of Platinum(II) Complexes of 3-Aminocyclopentanespiro- 5-hydantoin and 3-Aminocycloheptanespiro-5-hydantoin." Zeitschrift für Naturforschung C 58, no. 1-2 (2003): 103–8. http://dx.doi.org/10.1515/znc-2003-1-218.

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Four new platinum(II) complexes of 3-aminocyclopentanespiro-5-hydantoin (acpsh) and 3-aminocycloheptanespiro-5-hydantoin (achpsh) were synthesized and characterized by elemental analysis, IR and 1NMR spectra. The spectral analyses indicated a cis-square planar structure of the complexes with ligands coordinated via the NH2 group. The complexes were evaluated for in vitro cytotoxicity in murine erythroleukemia (MEL) cells, clone F4N, using cell-growth and macromolecular synthesis assay. The compounds, with exception of [Pt(NH3)(achpsh)Cl2] (IV), exhibited much lower cytotoxicity than that of ci

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38

Kumpfer, Justin R., Stephen D. Taylor, William B. Connick, and Stuart J. Rowan. "Vapochromic and mechanochromic films from square-planar platinum complexes in polymethacrylates." Journal of Materials Chemistry 22, no. 28 (2012): 14196. http://dx.doi.org/10.1039/c2jm32160b.

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39

Zuleta, Juan A., Carlos A. Chesta, and Richard Eisenberg. "Square-planar complexes of platinum(II) that luminesce in fluid solution." Journal of the American Chemical Society 111, no. 24 (1989): 8916–17. http://dx.doi.org/10.1021/ja00206a023.

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40

Goshe, Andrew J., Ian M. Steele, and B. Bosnich. "Supramolecular recognition: association of palladium molecular clefts with planar platinum complexes." Inorganica Chimica Acta 357, no. 15 (2004): 4544–51. http://dx.doi.org/10.1016/j.ica.2004.06.037.

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41

Melník, Milan, Peter Mikuš, and Clive E. Holloway. "Platinum organometallic complexes: classification and analysis of crystallographic and structural data of tri- and oligomeric complexes." Reviews in Inorganic Chemistry 34, no. 4 (2014): 247–79. http://dx.doi.org/10.1515/revic-2013-0015.

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AbstractThis review covers almost 100 organoplatinum complexes: trimers (40 examples), tetramers (40 examples), pentamers (4 examples), hexamers (5 examples), nona- and oligomers (8 examples). Platinum is predominantly found in the oxidation states +2 and +4. A number of coordination geometries are observed, the most common being essentially square planar, especially with Pt(II), and distorted octahedral, especially with Pt(IV). The most common ligands are methyl, carbonyl, PX3 and bis(diphenylphosphine)methane. Relationships between the Pt-Pt distances, Pt-X-Pt bridge angles, Pt-L bond distan

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42

Skabitskii, I. V., Yu Ya Il’ina, and S. S. Shapovalov. "Rhenium(V) Tris(pyrazolyl)borate Complexes as Ligands in Square Planar Palladium and Platinum Complexes." Координационная химия 49, no. 1 (2023): 36–43. http://dx.doi.org/10.31857/s0132344x22700086.

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The reactions of TpReO(SnC3H7)2 (Tp = tris(pyrazolyl)borate anion) with acetonitrile complexes PdCl2(MeCN)2 and PtI2(MeCN)2 in toluene solutions resulted in the formation of new heterometallic rhenium complexes TpReO(µ-SnC3H7)2MX2 (MX2 = PdCl2 (I), MX2 = PtI2 (II)). A similar complex TpReO(µ-SnC3H7)2PdI2 (III) was formed either on treatment of I with NaI in dichloromethane or in the reaction of TpReO(SnC3H7)2 with a suspension of PdI2 in toluene. Complexes I–III were characterized by IR and NMR spectroscopy and by X-ray diffraction (CCDC nos. 2172225–2172227).

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43

Robinson, Matthew E., David J. Lunn, Ali Nazemi, George R. Whittell, Luisa De Cola, and Ian Manners. "Length control of supramolecular polymeric nanofibers based on stacked planar platinum(ii) complexes by seeded-growth." Chemical Communications 51, no. 88 (2015): 15921–24. http://dx.doi.org/10.1039/c5cc06606a.

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We report the formation of high aspect ratio supramolecular polymeric nanofibers with small widths, and relatively narrow length distributions, from square planar Pt(ii) complexes using seed initiators under kinetic control.

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44

Suzuki, Takayoshi, Hiroshi Yamaguchi, Masayuki Fujiki, Akira Hashimoto, and Hideo D. Takagi. "Crystal structures of dichloridopalladium(II), -platinum(II) and -rhodium(III) complexes containing 8-(diphenylphosphanyl)quinoline." Acta Crystallographica Section E Crystallographic Communications 71, no. 5 (2015): 447–51. http://dx.doi.org/10.1107/s2056989015006076.

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The crystal structures of dichloridopalladium(II), -platinum(II) and -rhodium(III) complexes containing 8-(diphenylphosphanyl)quinoline, (SP-4)-[PdCl2(C21H16NP)], (1) [systematic name: dichlorido(8-diphenylphosphanylquinoline)palladium(II)], (SP-4)-[PtCl2(C21H16NP)]·CH2Cl2, (2) [systematic name: dichlorido(8-diphenylphosphanylquinoline)platinum(II) dichloromethane monosolvate], and (OC-6–32)-[RhCl2(C21H16NP)2]PF6·0.5CH2Cl2·0.5CH3OH, (3) [systematic name:cis-dichloridobis(8-diphenylphosphanylquinoline)rhodium(III) hexafluoridophosphate dichloromethane/methanol hemisolvate] are reported. In thes

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45

Jing, Jing, Miao Yu, Lei Pan, et al. "Synthesis and Biological Activities of Luminescent 5,6-Membered Bis(Metallacyclic) Platinum(II) Complexes." Molecules 28, no. 17 (2023): 6369. http://dx.doi.org/10.3390/molecules28176369.

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Four couples of 5,6-membered bis(metallacyclic) Pt(II) complexes with acetylide and isocyanide auxiliary ligands have been prepared and characterized. The structures of (−)-2 and (−)-3 are confirmed by single-crystal X-ray diffraction, showing a distorted square-planar coordination environment around the Pt(II) nucleus. Both solutions and solid samples of all complexes are emissive at RT. Acetylide-coordinated Pt(II) complexes have a lower energy emission than those isocyanide-coordinated ones. The emission spectra of N^N′*C-coordinated Pt(II) derivatives show a lower energy emission maximum r

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46

Łakomska, Iwona, Dariusz Śmiłowicz, Mateusz Jakubowski, Jerzy Sitkowski, and Andrzej Wojtczak. "Platinum(II) Complexes with Bulky Disubstitute Triazolopyrimidines as Promising Materials for Anticancer Agents." Materials 13, no. 23 (2020): 5312. http://dx.doi.org/10.3390/ma13235312.

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Herein, we present dicarboxylate platinum(II) complexes of the general formula [Pt(mal)(DMSO)(L)] and [Pt(CBDC)(DMSO)(L)], where L is dbtp 5,7-ditertbutyl-1,2,4-triazolo[1,5-a]pyrimidine) or ibmtp (7-isobutyl-5-methyl-1,2,4- triazolo[1,5-a]pyrimidine), as prospective prodrugs. The platinum(II) complexes were synthesized in a one-pot reaction between cis-[PtCl2(DMSO)2], silver malonate or silver cyclobutane-1,1-dicarboxylate and triazolopyrimidines. All platinum(II) compounds were characterized by FT-IR, and 1H, 13C, 15N and 195Pt NMR; and their square planar geometries with one monodentate N(3

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47

Jawad, Waleed Abbas, Asim Alaa Abd Al-Hussein Balakit, and Mahmoud Najim Abid Al-Jibouri. "Synthesis, Characterization and Antibacterial Activity Study of Cobalt(II), Nickel(II), Copper(II), Palladium(II), Cadmium(II) and Platinum(IV) Complexes with 4-Amino-5-(3,4,5-trimethoxyphenyl)-4<i>H</i>-1,2,4-triazole-3-thione." Indonesian Journal of Chemistry 21, no. 6 (2021): 1514. http://dx.doi.org/10.22146/ijc.67021.

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New transition metal complexes of cobalt(II), nickel(II), copper(II), palladium(II), cadmium(II), and platinum(IV) with bidentate ligand 4-amino-5-(3,4,5-trimethoxyphenyl)-4H-1,2,4-triazole-3-thiol were synthesized and characterized by microelemental analyses (CHNS), Fourier-transform infrared (FT-IR), UV-Visible spectra, molar conductance, magnetic susceptibility and thermal analyses (TG-DSC). The ligand was synthesized by ring closure of potassium-2-(3,4,5-trimethoxybenzoyl) hydrazine carbodithioate with an excess amount of hydrazine, and then was acidified using hydrochloric acid. The ligan

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48

Skabitskii, I. V., Yu Ya Il’ina, and S. S. Shapovalov. "Rhenium(V) Tris(pyrazolyl)borate Complexes as Ligands in Square Planar Palladium and Platinum Complexes." Russian Journal of Coordination Chemistry 49, no. 1 (2023): 33–40. http://dx.doi.org/10.1134/s1070328422700191.

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49

Koshiyama, Tamami, та Masako Kato. "[(1R,2R)-1,2-Diaminocyclohexane-κ2 N,N′](α-diimine-κ2 N,N′)platinum(II) bis(hexafluorophosphate), where α-diimine is 2,2′-bipyridine and 1,10-phenanthroline". Acta Crystallographica Section C Crystal Structure Communications 59, № 11 (2003): m446—m449. http://dx.doi.org/10.1107/s0108270103020869.

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The title PtII complexes, viz. (2,2′-bipyridine-κ2 N,N′)[(1R,2R)-1,2-diaminocyclohexane-κ2 N,N′]platinum(II) bis(hexafluorophosphate), [Pt(C6H14N2)(C10H8N2)](PF6)2, and [(1R,2R)-1,2-diaminocyclohexane-κ2 N,N′](1,10-phenanthroline-κ2 N,N′)platinum(II) bis(hexafluorophosphate), [Pt(C6H14N2)(C12H8N2)](PF6)2, containing an aromatic α-diimine and a non-planar diaminocyclohexane, both form a ladder-type structure, which is constructed via loose π–π stacking on the α-diimine ligands and hydrogen bonding between the cyclic amines and the counter-anions. In the former compound, there are two independen

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50

De Beukeleer, Sabrina, Giannis S. Papaefstathiou, Catherine P. Raptopoulou, et al. "Studies of Monothiomalonamide and its Palladium(II) and Platinum(II) Complexes." Zeitschrift für Naturforschung B 57, no. 11 (2002): 1224–36. http://dx.doi.org/10.1515/znb-2002-1106.

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A project related to the crystal engineering of hydrogen bonded coordination complexes has been initiated and our first results are presented here. The cis and trans forms of monothiomalonamide (LH2) have been fully characterized by vibrational spectroscopy, thermal techniques and single-crystal X-ray diffraction. The cis form crystallizes in the monoclinic space group P21/c and the trans form in the monoclinic space group C2/c. The respective lattice constants are a = 5.602(3), b = 9.055(2), c = 10.945(5)Å , β = 101.29(2)" (cis-LH2) and a = 20.336(7), b = 4.317(1), c = 12.432(5) Å, β = 92.16(

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