Crystal structure of di-µ-phenyl-bis(dimethylaluminium)

Abstract

Crystals of the title compound are triclinic, space group P, with three dimeric molecules in the reduced cell of dimensions a= 12·313, b= 12·755, c= 9·352 Å, α= 102·8, β= 91·6, γ= 61·3°. The structure was determined by Patterson and Fourier methods from 3126 visually estimated photographic data, and refined by least-squares to R 10·6%. One third of the molecules lie on centres of symmetry with the [graphic omitted] ring necessarily planar, and the remainder are in general positions, with the central ring ‘folded’ by 14° about the Al ⋯ Al line. Al ⋯ Al is 2·687, Al–C(bridge) 2·144, and Al–C(terminal) 1·977 Å; the Al–C–Al bridge angle is 77·6°.