| Abstract
| - Steric control, exerted by tin- and ligand-bound organic substituents, over tin stereochemistry and supramolecular association is demonstrated in a series of diorganotin 2-picolinate and 2-quinaldate structures.
- Structural data (X-ray and solution and solid-state 119Sn NMR) show that skew-trapezoidal-bipyramidal diorganotin compounds of 2-quinaldate are invariably monomeric, owing to thesteric bulk of the carboxylate ligand. In contrast, most of the analogous compounds of2-picolinate (2-pic) can increase their coordination number by polymerization or theincorporation of solvent in their coordination sphere in the solid state. The exceptionalcompound is tBu2Sn(2-pic)2 (3), for which no increase in coordination number is apparent,a result that is correlated with the bulky tert-butyl groups. Thus, judicious choice of tin orligand substituents can be exploited to dictate coordination number and/or the degree ofsupramolecular aggregation in the investigated systems.
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