Synthesis and spectroscopic studies of some new organometallic chelates derived from bidentate ligands

摘要

A series of organosilicon(IV) and organotin(IV) complexes having the formulae R2MCl(L~1), R,2MCl(L~2), R2MCl(L~3), R2MCl(L~4), R2M(L~1)2, R2M(L~2)2, R2M(L~3)2, and R2M(L~4)2 , where M = Si and Sn, and R = GH3, were synthesized with Schiff bases 5-mercapto-4-(pyridine-2-carboxalideneamino)-s-triazole (HL~1), 4-(furfuralideneamino)-5mercapto-s-triazole (HL~2), 4-(2-chlorobenzylideneamino)-5-mercapto-s-tria-zole (HL~3), and 4-(4-nourobenzylideneamino)-5-mercapto-s-triazole (HL~4). These complexes were characterized by elemental analysis, molar conductance, and spectroscopic studies, including UV, IR, ~1H, ~(13)C, ~(29)Si, and ~(119)Sn NMR spectroscopy. On the basis of these studies, the resulting complexes are proposed to have trigonal bipyramidal and octahedral geometries.