Excitation wavenumber dependence of the symmetric chain-stretching mode of linear-chain mixed-valence platinum complexes
- 1 January 1983
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics
- Vol. 79 (4) , 519-527
- https://doi.org/10.1039/f29837900519
Abstract
The wavenumber, ν1, of the symmetric chain-stretching mode of linear-chain halogen(X)-bridged mixed-valence complexes of platinum increases as the wavenumber of the excitation line (ν0) increases, whereas those of equatorial modes do not. For any set of complexes the wavenumber change, ν1(λ0= short wavelength)–ν1(λ0= long wavelength), increases in the order Cl < Br < I and is largest for those complexes in which the PtII PtIV separation is least and for which the bond-length ratio r(PtIV–X)/r(PtII–X) is nearest to unity. This suggests that the wavenumber dispersion of v1 with v0 depends on the extent of valence delocalisation along the chain.Keywords
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