Preparation and crystal structure of S2I42+(AsF6–)2 containing the distorted right triangular prismatic disulphur tetraiodine(2+) cation and a disulphur unit of bond order greater than two
Abstract
S2I42+(AsF6–)2 has been prepared and its crystal structure determined in which the S2I42+ cation was found to have a distorted right triangular prismatic structure, with one S2 and two I2 units joined by weak sulphur–iodine bonds; the sulphur–sulphur bond distance is the shortest reported in an isolated compound, and is indicative of the presence of a 3pπ–3pπ bond and a bond order greater than two.