[N'-(5-Chloro-2-oxidobenzyl-idene-κO)-3-hydr-oxy-2-naphthohydrazidato-κN',O]dimethyl-tin(IV)

The Sn(IV) atom in the title compound, [Sn(CH(3))(2)(C(18)H(11)ClN(2)O(3))], shows a trans-C(2)NO(2)Sn trigonal-bipyramidal coordin-ation; the axial O-Sn-O angle is 155.22 (5)°. The tridentate N'-(5-chloro-2-oxidobenzyl-idene)-3-hydr-oxy-2-naphthohydrazidate dianion is stabilized by an intra-molecular O-H⋯N hydrogen bond.