Redetermination of the structure of trans-diamminedibromoplatinum(II)–trans-diamminetetrabromoplatinum(IV), trans-[{PtBr2(NH3)2}{PtBr4(NH3)2}]

Keller, H. J.; Keppler, Bernhard K.; Ledezma-Sanchez, G.; Steiger, W.

doi:10.1107/s0567740881003889

Cited by 12 publications

(3 citation statements)

References 5 publications

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“…in good agreement with those found for other Pt compounds (Keller et al, 1981;Ryan & Rundle, 1961;Bokii & Kukina, 1965;Russell, Tucker & Whittaker, 1975;Messmer & Amma, 1966;Mblanson, Rochon & Hubert, 1979;M61anson, Hubert & Rochon, 1975). The Pt-N distance [2.09 (4) A] is also normal (Keeton, Mason & Russell, 1971;Colamarino & Orioli, 1975;Caira & Nassimbeni, 1975;Thiele & Wagner, 1978;Meester, Olie, Sint & Schenk, 1975).…”

Section: Description Of the Structuresupporting

confidence: 76%

Structure of the mixed-valence compound dipotassium tribromo(pyridine)platinate(II) pentabromo(pyridine)platinate(IV) dihydrate

Beauchamp¹,

Layek²,

Théophanides³

1982

Acta Crystallogr Sect B

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Section: Description Of the Structuresupporting

confidence: 76%

Structure of the mixed-valence compound dipotassium tribromo(pyridine)platinate(II) pentabromo(pyridine)platinate(IV) dihydrate

Beauchamp¹,

Layek²,

Théophanides³

1982

Acta Crystallogr Sect B

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“…This picture is only partly verified by calculations on PtBr chains for which all sideligands have been neglected. Both according to the singlechain calculations and according to the crystal calculations, the optimized Pt-Br distance was roughly 13% too small compared with experiments [25] (i.e., 9.14 a.u. vs. 10.49 a.u.).…”

Section: An MX Chainmentioning

confidence: 87%

Some density-functionalLMTO studies of electronic properties of quasi-one-dimensional systems

Springborg

1993

Int. J. Quantum Chem.

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Results of first-principles, density-functional, LMTO calculations on quasi-one-dimensional systems are presented. Special emphasis is put on the problems related with studying the properties of real materials by means of electronic structure calculations. As examples we discuss undoped and doped trans polyacetylene, an M X chain compound, CaNiN, and a comparison between polycarbonitrile and hydrogen cyanide. It is argued that single-chain calculations on undoped polyacetylene predict a bondlength alternation, whereas this may be suppressed in multichain calculations. For an MX chain we demonstrate the importance of including the full ligand structure, whereas many properties of CaNiN can be understood as intrinsic to single chains. A comparison between the covalently bonded polycarbonitrile and the hydrogen-bonded hydrogen cyanide reveals differences between delocalized and localized electrons but also inaccuracies in the relative total energies. Finally, results for doped trans polyacetylene indicate relatively large electronic dopant-polymer hopping integrals as well as problems in describing electron transfers for weakly interacting systems when using a localdensity approximation. In total it is demonstrated that reliable and useful informations are obtained in most cases, but also that one has to be careful in choosing the idealized system that is to represent the real material and that certain aspects of the localdensity approximation should be improved.

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“…Correlations between crystal structures -in particular the relative M IV-X /M 11-X distances (r) in the chain direction -and electrical conductivities indicate that an increase in conductivity in the order X = Cl < Br < I corresponds to r(M IV-X )/r(M II-X ) -* 1.0; however, other factors must be involved since there are somewhat different conductivities for complexes with essentially similar structures (for example, for [Pt(N H 3)2Br2] [Pt(N H 3)2Br4], r(P tIV-B r)/ r(P tn -Br) = 0.81 (Keller et al 1981), conductivity cr = 3.4 x 10-9 Q -1 cm-1 (Interrante & Browall 1974), cf. 0.79 (Ryan & Rundle 1961) and i0 _1° Q _1 cm-1 (Interrante & Browall 1974) for [Pt(en)Br2] [Pt(en)Br4].…”

Section: )-mentioning

confidence: 99%

Vibrational studies of, and model for, halogen-bridged linear-chain mixed-valence complexes

Allen

Clark

Croud

et al. 1985

Phil. Trans. R. Soc. Lond. A

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A number of complexes of the type [M II (LL) 2 ] [Pt IV (LL) 2 Cl 2 ] [ClO 4 ] 4 , where M = Ni, Pd or Pt and LL = 1,2-diaminoethane (en) or 1,2-diaminopropane (pn), as well as the monomers [Pt IV (LL) 2 Cl 2 ] Cl 2 and [M II (LL) 2 ] Cl 2 have been studied using Fourier transform infrared (f.t.i.r.) and resonance Raman spectroscopy. Under conditions of low tem perature and moderate resolution ( ca . 0.5 cm -1 ) it has proved possible to observe chlorine isotopic splitting in bands due to both the symmetric and the antisymmetric stretching modes of the linear Pt IV Cl 2 units in the chains. On the basis that the one-dimensional electronic properties of these chains are likely to be related to the in-chain Pt IV -Cl stretching force constants, a simple vibrational model is presented, which is able to reproduce the observed splitting patterns to well within experimental error. A comparative study of the Pt IV -Cl stretching force constants for the series of en complexes shows the trend: trans -[Pt IV (en) 2 Cl 2 ] Cl 2 (monomer) > Pd II - Pt IV > Ni II - Pt IV > Pt II −Pt lV . This trend is in line with that of the M II …Pt IV intervalence band maxima, namely Pd II - Pt IV (25000 cm -1 ) > Ni II - Pt IV (22200 cm -1 ) > Pt II - Pt IV (20800 cm -1 ), indicating an increase in M II … Cl chain interaction (and an expected increase in conductance) along the series.

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Redetermination of the structure of trans-diamminedibromoplatinum(II)–trans-diamminetetrabromoplatinum(IV), trans-[{PtBr₂(NH₃)₂}{PtBr₄(NH₃)₂}]

Cited by 12 publications

References 5 publications

Structure of the mixed-valence compound dipotassium tribromo(pyridine)platinate(II) pentabromo(pyridine)platinate(IV) dihydrate

Structure of the mixed-valence compound dipotassium tribromo(pyridine)platinate(II) pentabromo(pyridine)platinate(IV) dihydrate

Some density-functionalLMTO studies of electronic properties of quasi-one-dimensional systems

Vibrational studies of, and model for, halogen-bridged linear-chain mixed-valence complexes

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