Polarography of some coordination compounds of platinum. IV. Compounds of platinum(II) containing 1,10-Phenanthroline

Hall, J. R.; Plowman, RA

doi:10.1071/ch9560143

Cited by 9 publications

(4 citation statements)

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“…The metal-centered reduction of Pt(bpy) 2 2+ appears to contrast with the ligand-centered reduction of Pt(bpy)L n ( n = 1, bidentate ligand (excluding 2,2‘-bipyridine); n = 2, monodentate ligand) in DMF . In aqueous solution, the reduction of an analogous complex, [Pt II (phen) 2 ] 2+ , is reported , to give rise to the formation of an olive-green filamentous material on the surface of a mercury electrode or an iron wire. Isolation and identification of the material were, however, not possible.…”

Section: Resultsmentioning

confidence: 96%

Synthesis and Characterization of Bis(2,2‘-bipyridyl)platinum(I): A Novel Microtubular Linear-Chain Complex

et al. 1996

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One-electron reduction of [Pt(bpy)2]2+ (bpy = 2,2‘-bipyridyl) in aqueous solution results in the formation of black-green lustrous needles on solid electrodes. The crystalline needles grow perpendicularly from the substrate surface and reach lengths of 1−2 cm. Elemental analysis, X-ray photoelectron spectroscopy, and electrochemical measurements indicate that the new compound is a genuine PtI complex with a d9 electronic configuration and with the composition [Pt(bpy)2]NO3·2H2O. X-ray crystallographic analysis shows that the crystalline needles consist of linear chains of discrete [PtI(bpy)2] units with a Pt−Pt distance of 3.563(1) Å and with each bipyridyl ligand overlapping face-to-face (eclipsed) with its nearest neighbor. At the monomeric level, the structure of [PtI(bpy)2] units exhibits a distorted square-planar configuration with structural parameters very similar to those of the parent PtII complex, [Pt(bpy)2](NO3)2·H2O. The new linear-chain compound was prepared by chemical and electrochemical methods. The resulting crystals are relatively stable in air but oxidize slowly over a period of weeks. Scanning electron microscopy reveals that the crystals are tubular with a hollow near-hexagonal morphology. Cooperative effects influence the optical and electrical properties of the crystals. Because of extensive solid-state interactions between stacked monomeric [PtI(bpy)2] units, the crystals absorb strongly over the whole visible region and far into the near infrared. Their room temperature electrical conductivity is relatively high, 10 Ω-1 cm-1.

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Section: Resultsmentioning

confidence: 96%

Synthesis and Characterization of Bis(2,2‘-bipyridyl)platinum(I): A Novel Microtubular Linear-Chain Complex

et al. 1996

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“…The ability for a [Pt I (bipy) 2 ] + complex to form an interacting platinum chain suggests that other well‐known platinum complexes may also possess weak but significant Pt–Pt interactions. For example, in aqueous solutions of [Pt(phen) 2 ] 2+ (phen = 1,10‐phenanthroline) filamentous material was observed to form upon the surface of electrodes, but was not able to be isolated or identified 156. The greater rigidity of the 1,10‐phenanthroline ligand likely prevents the twisting observed in the [Pt I (bipy) 2 ] + system.…”

Section: Complexes With Pt–n Bondsmentioning

confidence: 99%

Platinum Stacking Interactions in Homoleptic Platinum Polymers

Anderson

Hurst

2009

Eur J Inorg Chem

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Recent breakthroughs in low‐dimensional nanostructures have led to a renewal of interest in polymers composed of platinum complexes. The surge of research into one‐dimensional platinum complexes in the 1970s and 1980s has given way to a steady progression of investigations that have explored new ligands, characterization techniques and applications. The ongoing synthesis and characterization of new tetra(cyano)platinate, bis(oxalato)platinate and other homoleptic platinum complexes has allowed examination of the influence of organic and inorganic cations on the Pt–Pt distance and the importance of small molecules in stabilizing the stacking interactions. In particular, complexes of [Pt(C≡NR)4]2+ and [PtI(bipy)2]+ show potential to display short stacking interactions. This microreview focuses on the progress in the synthesis and characterization of homoleptic complexes with short Pt–Pt distances and avenues for the development of new classes of complexes.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)

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“…(Ethylenediamine)-(3,4,7,8-tetramethyl-1,10phenanthroline)platinum(II) dichloride and bis-(1,10-phenanthroline)platinum(II) dichloride The former complex was prepared as described by McFadyen et al (1985) and the latter as described by Hall & Plowman (1956).…”

Section: C1qh22n403ptsmentioning

confidence: 99%

Binuclear platinum (II)-terpyridine complexes. A new class of bifunctional DNA-intercalating agent

McFadyen¹,

Wakelin²,

Roos³

et al. 1986

Biochemical Journal

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A series of binuclear DNA-binding ligands was prepared by linking two (2,2':6',2"-terpyridine)platinum(II) moieties via alpha omega-dithiols of the type HS-[CH2]n-SH where n = 4-10. A monomeric analogue was also synthesized. Compounds were characterized by elemental analysis and electronic and n.m.r. spectroscopy. Viscometric measurements with sonicated rod-like DNA fragments and covalently closed circular DNA were performed to investigate the mode of binding of these agents. The ligands with n = 5 and 6 function as bis intercalators and form a single 'base-pair sandwich' in violation of neighbour-exclusion binding. Bifunctional reaction occurs for the ligand with n = 7, whereas the ligands with n = 8 and 10 show a preference for mixed monofunctional/bifunctional binding. The data do not permit definitive assignment of the binding mode of the ligands with n = 4 and 9. All compounds are growth-inhibitory against mouse leukaemia L1210 cells in culture with IC50 values in the range 2-14 microM.

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Polarography of some coordination compounds of platinum. IV. Compounds of platinum(II) containing 1,10-Phenanthroline

Cited by 9 publications

References 0 publications

Synthesis and Characterization of Bis(2,2‘-bipyridyl)platinum(I): A Novel Microtubular Linear-Chain Complex

Synthesis and Characterization of Bis(2,2‘-bipyridyl)platinum(I): A Novel Microtubular Linear-Chain Complex

Platinum Stacking Interactions in Homoleptic Platinum Polymers

Binuclear platinum (II)-terpyridine complexes. A new class of bifunctional DNA-intercalating agent

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