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
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-Bu2AlAs(SiMe3)2)2, (1) and (Me2AlAs(SiMe3)2)2 (2) were prepared by coupling reactions between LiAs(SiMe3)2 and R2AlCl (R = i-Bu and Me, respectively). Reactions between As(SiMe3)3 and R2AlCl (R = i-Bu, Me) in 1: 1 and 1:2 mole ratio at ambient temperature have failed to give expected dehalosilylation products, but have instead yielded the adducts R2(Cl)Al-As(SiMe3)3 (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 C21/c(C2h6), a = 19.202(2) A, b = 12.601(1) A, c = 19.278(2) A, b = 106. 86(1)deg; 2, triclinic, space group P1(Ci1)a = 9.723(1) A, b = 9.968(1) A, c = 9.246(1) A, a 99.18(1)deg, b = 115.70(1)deg, g = 77.13(1)deg; 3, monoclinic, space group P21/c(C2h5), a = 15.105(1) A, b 11.574(1) A, c = 18.655(1) A, b = 119.25(1)deg. aluminum-arsenic, synthesis, crystal structures, ring compounds, adduct.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 12, 1992
- Accession Number
- ADA248001
Entities
People
- A. T. Mcphail
- R. L. Wells
- T. M. Speer
Organizations
- Duke University