Die Kristallpackung in drei Modifikationen von PPh4[ReO(S4)2] und PPh4[ReS(S4)2

Abstract

The Crystal Packing in three Modifications of PPh4[ReO(S4)2] and PPh4[ReS(S4)2] Mixed crystals PPh4[ReS(S4)2]0,63[ReO(S4)2]0,37 were obtained from PPh4Cl, ReCl5 and Na2S4 in acetonitrile. Their crystal structure corresponds to the known structure of this kind of compound (space group P21/n). In a similar reaction with ReBr5 instead of ReCl5, PPh4[ReO(S4)2] was obtained in small yield. Its triclinic crystal structure was determined by X-ray crystallography (space group P1). It contains cation pairs (PPh4+)2 such as they have been found in many other instances. In contrast, the crystal structures of the mixed crystals and of one known modification of PPh4[ReS(S4)2] have PPh4+ columns similar to compounds crystallizing in the space group P4/n, albeit in a severely distorted manner; their space group P21/n is a subgroup of P4/n with a doubled unit cell. In another modification of PPh4[ReS(S4)2] (space group P21/c) the columns are less distorted, but arranged in a different way.