[(N,N-Dimethylthiocarbamoylthio)acetato]trimethyltin

Abstract

Carboxy bridges link the independent molecules of the title compound, catena-poly [trimethyltin-#-(N, N-dimethylthiocarbamoylthio ) acetato-O:O' ], [Sn-(CsH8NO2S2)(CH3)3], in a linear chain along the x axis; both five-coordinate Sn atoms (two independent molecules in the asymmetric unit) show trans-trigonal bipyramidal coordination. [ (N,N-Dimethylthiocarbamoylthio)acetato] trimethyltin and [(N,N-dimethylthiocarbamoylthio)acetato]triphenyltin are predicted to adopt helical chain structures on the basis of variable-temperature l l9mSn Mfssbauer measurements (Ng & Kumar Das, 1991), and the assignment for the triphenyltin ester, which propagates by twofold screw axes, has been been confirmed recently (Ng & Kumar Das, 1995). Comment[(N, N-Dimethylthiocarbamoylthio)acetato ]trimethyltin, (I), crystallizes as two symmetry-independent molecules linked by carboxylate bridges into a chain, which propagates by translations along x. Both Sn atoms show trans-C3Sn02 trigonal bipyramidal coordination and bond dimensions involving the Sn atoms compare well with those found in other carboxylate-bridged trimethyl- (Molloy, Quill & Nowell, 1987).Other bond dimensions of the carboxylate anion are similar to those found in the tris(hydroxymethyl)-methylammonium (Ng, 1995) and hydrated dicyclohexylammonium (Ng, 1992) salts. Symmetry codes: (i) 1 + x, y, z; (ii) x -1, y, z. (Received 15 August 1995; accepted 8 February 1996) AbstractIn the title compound, [Sn(C7H14OsP)(C6H5)3] , the planar triphenyltin cations are axially bridged through the carboxy and phosphoryl O atoms of the 3-(diethyl-