Crystal structure of anhydrous nitrates and their complexes. Part VI. Dimethyldinitratotin(IV)

Abstract

The title compound crystallises in the monoclinic space group P2₁/c with Z= 4 in a unit cell of dimensions: a= 6·36, b= 12·07, c= 12·18 Å, β= 121° 10′. The structure was solved by the heavy-atom Patterson method and refined by a least-squares method in two independent investigations. The first of these gave R 0·143 for 1074 reflections, and the second. R 0·089 for 1258 reflections. The molecules occur in layers parallel to (10). Within each molecule the two nitrate groups are almost coplanar and are bonded to the tin atom in an unsymmetrical bidentate manner. The two C–Sn bonds (2·11 and 2·12 Å) make an angle of 144° and their plane is very nearly perpendicular to that of the nitrate groups.