Aluminum-Phosphorus Chemistry: Preparation and Structural Characterization of (Et2AlP(SiMe3)2)2, Et(Cl)2Al P(SiMe3)3, and i-Bu2(Cl)Al P(SiMe3)3
Abstract
Reactions of R2AlCl (R = Et, i-Bu) and EtAlCl2 with P(SiMe3)3 and LiP(SiMe3)2 were studied to investigate the potential use of dehalosilylation and lithium chloride elimination reactions for the preparation of compounds containing either Al-P-Al-P or Al-P-Al-Cl core rings. The dimeric compound Et2AlP(SiMe3)22 (1) was isolated from the 1: 1 reaction of Et2AlCl and LiP(S iMe3)2 at -78 deg C, as a result of LiCl elimination. The 1:1 reaction of EtAlCl2 and P(SiMe3)3 yields Et(Cl)2Al.P(SiMe3)3 (2). Interestingly a similar reaction between Et2AlCl and P(SiMe3)3 in a 2:1 mole ratio also affords (2), in moderate yield, suggesting a rearrangement of the original aluminum alkylhalide. However, when Et2AlCl was reacted with P(SiMe3)3 in a 1: 1 mole ratio, the expected adduct Et2(Cl)Al(dot)P (SiMe3)3 (3) results. Unlike the Et2AlCl reaction, the analogous 2:1 mole reaction of i-Bu2AlCl and P(SiMe3)3 forms the mono-chloro adduct, i-Bu2AlCl.P(SiMe3)3 (4), rather than a rearrangement product.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1993
- Accession Number
- ADA265268
Entities
People
- Andrew T. McPhail
- Mark F. Self
- Richard L. Wells
Organizations
- Duke University