Bis(11-dimethyl­guanidinium) tetra­aqua­dimethyl­tin(IV) bis­(sulfate)

摘要

Single crystals of the title salt, (C3H10N3)2[Sn(CH3)2(H2O)4](SO4)2, formed concomitantly with the already known [Sn(CH3)3]2SO4·2H2O. In the title structure, the Sn^IV atom displays a slightly distorted octa­hedral coordination geometry defined by four O water atoms in the equatorial positions and two methyl groups in the axial positions. In the crystal, various O—H⋯O and N—H⋯O hydrogen-bonding inter­actions between the organic cation and the coordinated water mol­ecules as donors and the sulfate O atoms as acceptors result in a three-dimensional structure. The Sn^IV atom is located on an inversion centre, resulting in half of the complex metal cation being in the asymmetric unit.