STUDY OF ONE-DIMENSIONAL METAL-COMPLEXES - K[NI(MNT)2].H2O AND K[PT(MNT)2].H2O

The crystal structure, electrical conductivity and electronic and IR absorption spectra of two metal complexes, K[Ni(mnt)2]·H2O and K[Pt(mnt)2]·H2O (mnt=l,2-dicyano-l,2-ethylenedithiolato, C4N2S22-) were investigated. These two metal complexes belong to orthorhombic system and the lattice constants are a=12.00 Å, b=28.85 Å, and c=3.90 Å for the Ni complex and a=12.11 Å, b=29.23 Å, and c=7.73 Å for the Pt complex. Despite the same stoichiometries and similar crystal structures, the conductivity of Pt complex is 103 times as high as that of the Ni complex. The difference in the conductivity between the Ni and Pt complexes may be explained from the density of the unpaired electron on the central metal. The effects of the central metal on the electrical conduction properties may not be negligible for this type of complexes. © 1987 The Chemical Society of Japan.