Multinuclear NMR study of some diorgano(chloro)tin(IV) oxinates and thiooxinates

The ¹¹⁹Sn, ¹⁵N, ¹³C and ¹H NMR aswell as the solid state ¹¹⁹Sn CP-MAS NMR spectra have been used to study the structures of four diorgano(chloro)tin(IV) oxinates and thiooxinates, (C₆H₅)₂Sn(Cl)(oxin) and R₂Sn(Cl)(Txin), where R = benzyl, phenyl, or vinyl groups, oxin = 8-quinolinolate, txin = 8-quinolinethiolate, in deuteriochloroform solution and in the solid state. Both in a non-coordinating solvent (CDCl₃) and in the solid state the compounds studied are formed by monomeric molecular chelate complexes with a distorted cis-trigonal bipyramidal arrangement of coordination polyhedra centred on a five-coordinated tin atom. The fine structure of the centre-bands in the ¹¹⁹Sn CP-MAS spectra can qualitatively be explained as result of the combined effect of residual dipolar coupling and scalar interaction of the ¹¹⁹Sn nucleus with two different quadrupolar nuclei (¹⁴N, I = 1; ^35,37Cl, I = 3 2).