The crystal structure of dimethyltin diisothiocyanate

The crystal structure of Me2Sn(NCS)2 has been determined by single crystal X-ray diffraction. The crystals are orthorhombic, Pmmn, a = 9.79(2), b = 7.88(2), c = 5.57(2) Å, Z = 2. The structure consists of rather distorted tetrahedral dimethyltin diisothiocyanate molecules, linked by SSn interactions to form infinite chains along the Z axis with a repeat unit of one molecule. The SnC(H3) bonds lie in a plane perpendicular to that of the planar Sn(NCS)2 groups; the NCS units are vitually linear. The principal bond lengths and angles are: SnN 2.139(13), NC 1.174(14), CS 1.571(13), SSn 3.202(7), SnC(H3) 2.089(14) Å; < SnNC 163.5(1.1), < NCS 177.2(1.2), < CSSn 90.4(0.5), < (H3)CSnC(H3) 148.9(0.9)°.