Accession Number:

ADA248001

Title:

Synthesis and Characterization of Novel Aluminum-Arsenic Compounds II. Crystal Structures of (R2AlAs(SiMe3)2)2(R=i-Bu, Me) and i-Bu2(Cl)Al.As(SiMe3)3

Descriptive Note:

Technical rept.

Corporate Author:

DUKE UNIV DURHAM NC DEPT OF CHEMISTRY

Report Date:

1992-03-12

Pagination or Media Count:

21.0

Abstract:

The feasibility of utilizing dehalosilylation and lithium chloride elimination reactions for the preparation of compounds that may serve as precursors to aluminum-arsenic containing semiconducting materials has been further investigated. The novel aluminum-arsenic dimers i-Bu2AlAsSiMe322, 1 and Me2AlAsSiMe322 2 were prepared by coupling reactions between LiAsSiMe32 and R2AlCl R i-Bu and Me, respectively. Reactions between AsSiMe33 and R2AlCl R i-Bu, Me in 1 1 and 12 mole ratio at ambient temperature have failed to give expected dehalosilylation products, but have instead yielded the adducts R2ClAl-AsSiMe33 R i-Bu 3 and Me 4. All compounds were characterized by partial elemental analysis and 1H, 13C 1H and 27A1 1H NMR spectroscopy. Compounds 1, 2 and 3 were fully characterized by single-crystal X-ray analysis. Crystal data are as follows 1, monoclinic, space group C21cC2h6, a 19.2022 A, b 12.6011 A, c 19.2782 A, b 106. 861deg 2, triclinic, space group P1Ci1a 9.7231 A, b 9.9681 A, c 9.2461 A, a 99.181deg, b 115.701deg, g 77.131deg 3, monoclinic, space group P21cC2h5, a 15.1051 A, b 11.5741 A, c 18.6551 A, b 119.251deg. aluminum-arsenic, synthesis, crystal structures, ring compounds, adduct.

Subject Categories:

  • Inorganic Chemistry
  • Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE