The structure of dichlorodimethylbis(pyrazole-N2)tin(IV)

The structure of the complex Sn(CH3)2Cl2·2C3H4N2 has been determined by single crystal X-ray diffraction methods. The compound crystallizes in the monoclinic system, space Group C2/c (no. 15), with unit cell dimensions a 14.010(4), b 7.906(3), c 13.617(4) A, β 114.7(3)°, and Z = 4. The configuration about the tin atom is all-trans-octahedral. The pyrazole ligands, coordinated through the imino nitrogen atom, are intramolecularly and intermolecularly hydrogen bonded to the chloride ligands, the N(1)H … Cl distances being 3.480 and 3.297 A, respectively. Structural features of the complex are compared with those of other complexes of N-bonded heterocyclic ligands of the type Sn(CH3)2Cl2·2L.