Accession Number:

ADA279194

Title:

Synthesis and Characterization of Aluminum-Phosphorus Adducts: X-Ray Crystal Structures of Cl3Al(dot)P(SiMe3)3(dot)C7H8 and Br3Al(dot)P(SiMe3)3(dot) C7H8

Descriptive Note:

Technical rept.

Corporate Author:

DUKE UNIV DURHAM NC DEPT OF CHEMISTRY

Personal Author(s):

• Wells, Richard L.
• McPhail, Andrew T.
• Laske, Janeen A.
• White, Peter S.

Report Date:

1994-05-05

Pagination or Media Count:

24.0

Abstract:

The attempted dehalosilylation reactions between AlX3 X Cl, Br and PSiMe33 in toluene in 11 mole ratios afforded only the adducts Cl3Aldo PSiMe33 I and Br3AldotPSiMe33 II, respectively. Compounds I and II were characterized by 1H, 13C, 27Al, and 31P solution NMR spectroscopy, as well as partial elemental analysis. In addition, the solid state structures of the toluene solvates of I and II were determined by single-crystal X-ray analysis. Characterization revealed that the solid solvated adducts I and II are isostructural and their crystals are isomorphous. In each compound, the Al and the P atoms reside in tetrahedral environments, with each X3AldotPSiMe33 X Cl, Br molecule associated with one interstitial toluene molecule in the crystals. These adducts are noteworthy in that they possess extremely short, essentially equal Al-P bond lengths For I Al-P 2.3924 A, and for III Al-P 2.3916 A, which are the shortest found to date in aluminum-phosphorus molecular species. Aluminum-phosphorus compound, Adduct synthesis, Crystal structure

Descriptors:

• *CRYSTAL STRUCTURE
• *X RAYS
• *ALUMINUM
• *PHOSPHORUS COMPOUNDS
• ELECTRONICS
• ENVIRONMENTS
• METHYL RADICALS
• MOLECULES
• CRYSTALS
• INTERSTITIAL
• SOLVATES
• TOLUENES
• HALOGENS
• BROMINE
• CHLORINE
• SOLID STATE CHEMISTRY
• PHOSPHORUS
• CHEMICAL REACTIONS
• SILICON
• CHEMICAL BONDS
• SOLIDS
• ATOMS
• SINGLE CRYSTALS
• SYNTHESIS
• SPECTROSCOPY
• RATIOS

Subject Categories:

• Inorganic Chemistry
• Physical Chemistry
• Crystallography
• Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE