Crystal structure of tris(tetraethylammonium) tris-(1,2-dicyanoethylene-1,2-dithiolate)indate(III)

Abstract

The three-dimensional crystal structure of tris(tetraethylammonium) tris-(1,2-dicyanoethylene-1,2-dithiolato)-indate(III) has been determined by use of X-ray diffraction methods and counter data. The crystals are monoclinic, space group P2₁/c, with Z= 4 in a unit cell of dimensions a= 9·889(4), b= 25·924(8), c= 21·225(8)Å, and β= 117·9(1)°. The structure was solved by Patterson and Fourier methods and refined by the full-matrix least-squares technique to R 0·074 for 1379 observed reflections. The indium atom is surrounded by a slightly distorted octahedron of sulphur atoms; In–S bond lengths vary from 2·585(8)–2·626(8)Å. An explanation is offered for the variation.