Aquadi-n-but-yl(5-methyl-pyrazine-2-carboxyl-ato)tin(IV) methanol solvate.

In the monomeric title compound, [Sn(C(4)H(9))(2)(C(6)H(5)N(2)O(2))(2)(H(2)O)]·CH(3)OH, the Sn atom is seven-coordinate, displaying a distorted penta-gonal bipyramidal SnC(2)N(2)O(3) geometry with the two C atoms in the axial sites. In the crystal structure, inter-molecular O-H⋯O hydrogen bonds link the complex and solvent mol-ecules into infinite chains.