Accession Number : ADA265268


Title :   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


Descriptive Note : Technical rept.


Corporate Author : DUKE UNIV DURHAM NC DEPT OF CHEMISTRY


Personal Author(s) : Wells, Richard L ; McPhail, Andrew T ; Self, Mark F


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a265268.pdf


Report Date : Mar 1993


Pagination or Media Count : 33


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.


Descriptors :   *ALUMINUM COMPOUNDS , *SYNTHESIS(CHEMISTRY) , *PHOSPHORUS COMPOUNDS , PREPARATION , SINGLE CRYSTALS , X RAYS , CHLORIDES , MELTING POINT , DIMERS , LITHIUM CHLORIDE , ELIMINATION REACTIONS , CRYSTALLOGRAPHY , RINGS , YIELD , CRYSTALS , SPECTROSCOPY , PARAMETERS


Subject Categories : Ceramics, Refractories and Glass
      Coatings, Colorants and Finishes


Distribution Statement : APPROVED FOR PUBLIC RELEASE