REACTIVITY OF ORGANOGALLIUM-AMINE ADDUCTS AND GALLIUM AMIDES TOWARD SOME NONHYDROLYTIC GEL PRECURSOR MIXTURES

The synthesis and spectroscopic and structural characterization of som e new amine-gallane adducts as well as gallium amides are described. T his work was carried out in order to test their reactivity as gallium nitride precursors toward nonhydrolytic gel precursor mixtures, These mixtures usually consist of M(OR)(n)/M'Cl-n (M or M' = B, Al, Si, or T i) species combined in various proportions. It was found that the addu ct Me(3)GaNH(i-Pr)(2) reacts with SiCl4 to form compounds with gallium -chlorine bonds and up to three chlorines may be substituted at galliu m. The gallium amide (Me(2)GaNPh(2))(2) also reacts with SiCl4 to give a chlorinated species. The only amide precursor species that proved i nert to SiCl4 was the sterically encumbered derivative Ga{N(SiMe(3))(2 )}(3) which could be isolated unchanged after several days reaction ti me. In addition, the compound {TiCl(3)OEt}(n), was isolated from a Ti( OEt)(4)/SiCl4 reaction system and structurally characterized.