Synthesis and Characterization of Four-Membered Gallium-Arsenic Ring Compounds Containing a Bridging As(SiMe3)2 Group: Crystal Structures of Ph2GaAs(SiMe3)2Ga(Ph)2Cl and Ph2GaAs(SiMe3)2Ga(Ph)2Br
Abstract
The first organogallium four membered ring compounds with arsenic, halogen mixed bridging to be characterized completely, Ph2GaAs (SiMe3)2Ga(Ph) 2(X) (X=Br (2)) were prepared by the reaction of (Me3Si)3 as (3) with Ph2GaCL and Ph2GaBr, respectively. X-ray crystallographic analyses show the compounds to be isostructural with each containing a nonplanar Ga-As-Ga-X four membered ring. Isomorphous crystals of 1 and 2 belong to the monoclinic system, space group P21/c (C52h), with four molecules in unit cells. The non-planarity of the rings is manifested in the halogen atom displacements of 0.256 A in 1 and 0.293A in 2 from the respective Ga-As-Ga planes. Deviations from overall C2v symmetry serve to relieve unfavorable intramolecular bulky ring substituent interactions present in such a symmetric form. The dimer (Ph2GaAs(SiMe3)2)2 (4), obtained from the reaction of Ph2GaCL and LiAs(SiMe3)2, has been characterized by partial elemental analysis, NMR spectroscopy and cryoscopic molecular weight determination.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 26, 1989
- Accession Number
- ADA213292
Entities
People
- A. T. Mcphail
- C. G. Pitt
- R. L. Wells
- S. Shafieezad
- W. K. Holley
Organizations
- Duke University