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Issue 7, 1990
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Optical and magnetic properties of K[M{S2C2(CN)2}2]·H2O (M = Ni, Pt, or Au)

Abstract

The solid-state spectra of two series of [M(mnt)2]{mnt =[S2C2(CN)2]2–, M = Ni, Pt, or Au} monoanion salts of K and [NEt4]+ have been recorded. The polarized absorption spectrum of K[Ni(mnt)2]·H2O is characterized by a strong band at 6 700 cm–1 assigned to the intermolecular charge-transfer (c.t.) transition along the stacking direction, which is the first direct evidence of the one-dimensional character of its electronic structure. On the contrary, the polarized reflectance spectra of [Net4][M(mnt)2](M = Ni or Pt) are characterized by reflectance peaks at 7 200 cm–1, corresponding to the intermolecular c.t. transition within the dimer. The magnetic susceptibilities of K[M(mnt)2]·H2O (M = Ni or Pt) are also described. The behaviour of the platinum complex can be explained by the alternating antiferromagnetic S=½ Heisenberg chain model with the alternation parameter α= 0.9 and the exchange parameter 2|J|= 640 cm–1, which is consistent with its weakly dimerized stack structure.

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Article information


J. Chem. Soc., Dalton Trans., 1990, 2287-2292
Article type
Paper

Optical and magnetic properties of K[M{S2C2(CN)2}2]·H2O (M = Ni, Pt, or Au)

S. Kutsumizu, N. Kojima, N. Watanabe and T. Ban, J. Chem. Soc., Dalton Trans., 1990, 2287 DOI: 10.1039/DT9900002287

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