Methyl-(phenyl)-bis-(quinoline-2-carbox-ylato-κN,O)tin(IV) monohydrate.

The Sn(IV) atom in each of the two independent mol-ecules in the asymmetric unit of the title compound, [Sn(CH(3))(C(6)H(5))(C(10)H(6)NO(2))(2)]·H(2)O, is N,O-chelated by two quinoline-2-carboxyl-ate ions; the dative Sn-N bonds are significantly longer than the covalent Sn-O bonds. The two O and two N atoms comprise a trapezoid, and the diorganotin skeleton is bent over the longer N-N edge [C-Sn-C = 144.2 (1) and 144.5 (1)° in the two independent mol-ecules]. The uncoordinated water mol-ecules serve to connect the skew-trapezoidal bipyramidal tin-bearing mol-ecules, generating a linear chain motif running along the ac diagonal. The crystal studied was a non-merohedral twin having a minor component of 33.2 (1)%.