SYNTHESIS, REACTIONS, AND SPECTRAL [NMR (1H, 13C, 29Si), IR] STUDIES OF TRIMETHYLSILYL-SUBSTITUTED N-ARYLSALICYLALDIMINATES

Trimethylsilyl-substituted N-arylsalicylaldiminates Me3Si (OC6H4CH═NAr) [Ar═C6H5 (1), C6H3Me2-2,6 (2), C6H2Me3-2,4,6 (3), C6H3Et2-2,6 (4), and C6H3(Pr-i)2-2,6 (5)] have been prepared by the equimolar reactions of Me3SiCl with N-arylsalicylaldimines (LH) in benzene using Et3N as a base. Reactions in the desired molar ratios (1:1 or 2:1) of Me3Si(OC6H4CH═NAr) with TiCl4 and ZrCl4 afford a convenient and clean synthetic procedure for the preparation of chloride-salicylaldiminate derivatives of early transition metals. Characterisations of all these new derivatives have been carried out by elemental analyses, molecular weight determinations and spectroscopic [IR, NMR (1H, 13C and 29Si)] studies.