TRIFLUORO-BETA-DIKETONATES OF TIN(IV)

Adducts and substituted products of tin tetrachloride and monoorganoti n trichloride with unsymmetrical trifluroro-beta-diketones, CF(3)COCH( 2)COR (LH) (R = Me, Et, i-Pr and Ph) have been prepared and characteri sed. Ir spectra of adducts, SnCl4.LH are consistent with the enolic fo rm of the chelating diketone leading to an octahedral structure. X-ray crystal and molecular structure of complex, SnCl2(CF(3)COCHCOPh)(2) c onfirms cis-trans cis stereochemistry. H-1 nmr spectra suggest these t o be fluxional in solution. For organotin complexes, only tentative st ructures could be proposed from the limited spectral data.