Crystal structure of di-µ-phenyl-bis(diphenylaluminium)(triphenylaluminium dimer)

Abstract

Crystals of the title compound are triclinic, space group P, with one centrosymmetric dimer in the reduced cell of dimensions a= 9·565, b= 10·813, c= 8·328 Å, α= 106·2, β= 111·8, γ= 102·3°. The structure was determined by Patterson methods from 1636 observed data, visually estimated from Weissenberg photographs, and refined by least-squares methods to R 9·1%. The Al ⋯ Al vector (2·702 Å) is almost normal (84·4°) to the planes of the bridging phenyl groups; Al–C distances are 2·182 (bridge) and 1·958 Å(terminal), and the Al–C–Al bridge angle is 76·5°.