Reactivity Of A Carbonyl Moiety In Organotin(Iv) Compounds: Novel Pd(Ii) And Cu(Ii) Complexes Supported By Organotin(Iv) Ligands

Hydrolysis of [2-{(CH2O)(2)CH}C6H4]SnPh3 (1) results in the isolation of [2-(O = CH)C6H4]SnPh3 (2) in a very good yield. Reduction of 2 with NaBH4 gives an almost quantitative yield of [2-(HOCH2)C6H4]SnPh3 (3), when 2 is treated with appropriate amines in the absence of any solvent, [2-(4 '-PyCH2N = CH)C6H4]SnPh3 (4) and [2-{3 ',5 '-(MeOOC)(2)-C6H3N = CH}C6H4]SnPh3 (5) are isolated in high yields. Adding NaBH4 to a THF solution of 4 leads to [2-(4 '-PyCH2NH-CH2)C6H4]SnPh3 center dot BH3 (6), the first aryltin(iv) compound with a ligand containing a secondary amine functional group coordinated to the metal centre. The reaction of 4 with [PdCl2(NCMe)(2)] and [Cu(hfac)(2)center dot(H2O)] (hfac = hexafluoroacetylacetonate) in a 2 : 1 molar ratio gave the corresponding heterometallic complexes [{2-(4 '-PyCH2N = CH2)C6H4SnPh3}(2)PdCl2] (7) and [{2-(4 '-PyCH2N = CH2)C6H4SnPh3}(2)Cu(hfac)(2)] (8), respectively. The purity of the compounds was confirmed by elemental analysis and high-resolution mass spectrometry. Multinuclear NMR spectroscopy was used to investigate the solution behaviour of these compounds and the molecular structures for 1, 2, and 4-8 were established by single-crystal X-ray diffraction.