Monoclinic modification of aquadi-n-butyl­bis­(pyrazine-2-carboxyl­ato-κ(2) N (1),O)tin(IV)

The asymmetric unit of the title organotin(IV) compound, [Sn(C(4)H(9))(2)(C(5)H(3)N(2)O(2))(2)(H(2)O)], contains one-and-a-half mol­ecules. The half-mol­ecule is completed by crystallographic twofold symmetry, with its Sn and water O atoms lying on the rotation axis. Both mol­ecules feature seven-coordinate Sn atoms in trans-C(2)SnN(2)O(3) penta­gonal-bipyramidal coordination environments. The carboxyl­ate anions N,O-chelate to the Sn atom. In the crystal, the carboxyl­ate O atoms not involved in coordination serve as acceptors for O—H⋯O hydrogen bonds from adjacent water mol­ecules, generating a three-dimensional network.