Mesomorphic Transition Metal Complexes. 4. Dithiene Complexes of Ni, Pd, and Pt.

Abstract
A rational synthesis of transition metal dithiene complexes with mesophorphic properties is reported. In addition to the nickel complexes described earlier, we have now obtained the Pd and Pt congerers. While the Ni and Pt complexes show, depending on the length of the para-n-alkyl chains, smectic or nematic mesophases, the Pd complexes have no mesomorphic properties at all. We suggest that the reason for the absence of a mesophase in the Pd complexes is caused by the formation of dimers.

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