Structuren von 2, MeSbI2, und I. Darstellung von Me3SbI2 und Farbwechsel bei Me4Sb2*Me2SbBr

Article abstract of DOI:10.1016/0022-328X(92)83203-T

The crystal structures of the complex 2 (1) and its precursors MeSbI2 (2) and I (3) are reported.In 1 there are tetrahedral cations and square pyramidal anions with Sb-1 distances of 290-320 pm.The structure of 2 contains MeSbI2 molecules.They associate via iodine bridges to form linear chains with alternating short and long Sb-1 distances.The coordination around antimony is distorted tetragonal pyramidal.The tetrahedral coordination of the ions in 3 results in the formation of a wurtzite type structure with antimony-iodine distances of 406 and 435 pm.The novel adducts Me3Sb*MeSbI2 (4) and Me2SbSbMe2*Me2SbBr (5) are formed by reaction of the components.They decompose easily with formation of antimony(V) compounds.Crystals of 5 are yellow but become reversibly black on cooling.