GROUP IVB ORGANOMETALLIC DERIVATIVES: SYNTHESIS AND 13C NMR SPECTRA OF NEW SILYL AND STANNYL ISOXAZOLES
Several new organometallic isoxazoles, silylated and stannylated in the heterocyclic ring or in a side chain have been made.Their 13C NMR spectra are consistent with the previous conclusions on the electronic effects of MR3 and CH2MR3 (M=Si, Sn) groups, and indicate the importance of the p?-d? and ?-? mechanisms in the various ring positions.