On the Synthesis and Characterization of Novel Aluminum-Arsenic Compounds; Crystal Structure of Et2AlAs(SiMe3)22
Abstract
The viability of dehalosilylation and lithium chloride elimination reactions for use in the preparation of compounds containing core rings of the type was investigated. The second fully characterized aluminum-arsenic dimer, Et2AlAs(SiMe3)22, was isolated from a coupling reaction between Et2Alcl and LiAs(SiMe3)3 carried out at -78 C. Dehalosilylation reaction between Et2AlCl and As(SiMe3)3 in 1:1 and 2:1 mole ratios at ambient temperature failed to give the expected products, instead yielding the adduct Et2(Cl)Al As(SiMe3)3 (2). As evidenced by 1H NMR spectra, an NMR tube sample of 2 in benzene-d6 did undergo internal dehalosilylation when heated to 87 C in an oil bath. X-ray crystallographic analysis of 1 confirms its dimeric solid state structure and shows the Al-As-Al-As ring to be planar. Compound 1 crystallizes in the monoclinic system, space group C2/c (C2h6), with four molecules in a unit cell.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 03, 1991
- Accession Number
- ADA241333
Entities
People
- Andrew T. McPhail
- Richard L. Wells
- Timothy M. Speer
Organizations
- Duke University