Two novel polymeric bismuth(III) complexes with dmit: syntheses and structures of {[Et_4N][Bi(dmit)_2]}_n and {[Et_4N]_2[Bi_2(dmit)_4] centre dot Et_2O}_n (dmit = 1,3-dithiole-2-thione-4,5-dithiolate)

摘要

Two novel polymeric bismuth(III) complexes with dmit, {[Et_4N][Bi(dmit)_2]}_n (1) and {[Et_4N]_2[Bi_2(dmit)_4]}_n (2), have been synthesized and structurally characterized. Complex 1 is a one-dimensional polymer consisting of repeating Bi(dmit)_2 units in which each Bi atom is six-coordinated by six sulfur atoms from dmit ligands to form a distorted octahedron. Whereas the anions of complex 2 can be described as polymeric chains being composed of the repeating dimeric Bi_2(dmit)_4 units. in which the environment of the Bi atoms are similar to that in complex 1. In contrast to 1, there exists S...S contacts less than 3.7 A between two neighboring independent polymeric anions in complex 2, through which complex 2 forms a quasi two-dimensional structure.