Low-temperature X-ray single-crystal analysis of a conductive mixed-valence MMX-chain system, Pt2(dta)4I (dta = CH3CS2−)

The one-dimensional (1-D) chain structure of the title compound (Pt2(dta)4I) (dta=CH3CS2−) has been investigated by X-ray single-crystal analysis at low temperatures. An anomalous behavior was observed for the temperature dependence of the lattice constant a (⊥ chain). Below 90 K, a slight increase of the β value was observed, which might relate to the expected spin-Peierls distortion associated with dta-ligand twisting. A little difference in Pt–I distances was observed at 16 K. No obvious superstructure reflections were observed at low temperatures.