SYNTHESIS, CHARACTERIZATION, AND CHEMICAL VAPOR-DEPOSITION PROPERTIES OF PRIMARY AND SECONDARY NEOPENTYLSTIBINE - NEW ANTIMONY PRECURSORS FOR MOCVD

The primary and secondary neopentylstibines (neopentyl = Me3CCH2-) have been synthesized by the reduction of the corresponding dihalo- and monohaloantimony compounds, respectively. Neopentylstibine was prepared by the reduction of (Me3CCH2)SbBr2 with lithium aluminum hydride (LAH). The primary stibine is highly air-sensitive and exhibits a vapor pressure of 5.5 Torr at 0-degrees-C. Dineopentylstibine was synthesized by LAH reduction of (Me3CCH2)2SbI. The secondary stibine is less sensitive to air than its primary congener but nonetheless decomposes when exposed to air. Dineopentylstibine is substantially less volatile than (Me3CCH2)SbH2, exhibiting a vapor pressure of 0.5 Torr at 24 C. The detailed synthesis, spectroscopic characterizations, physical properties, and preliminary chemical vapor deposition experiments of these hydridic antimony compounds is described.