Abstract
A series of organotin(IV) maltol complexes R 4-x SnL x (1-4, 6; x=1-3) and the dichloro-compound Cl 2 SnL 2 (5) have been prepared and characterized on the basis of their IR-, 1 H-, 13 C- and 119 Sn-NMR data. While an X-ray crystal structure analysis of Ph 2 SnL 2 (4) and Cl 2 SnL 2 (5) reveals distorted cis-octahedral structures, the Me 2 SnL 2 molecule (2) adopts a skew-trapezoidal bipyramidal configuration with a very significant difference in the Sn-O(keto) bond distances. The tris-maltol complex BuSnL 3 (6) exhibits a distorted pentagonal-bipyramidal geometry with the butyl carbon and a hydroxy oxygen constituting the axial orientations
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