Abstract
The molecular structure of [(tBu)2Al(μ-OPh)]2 has been determined. The intramolecular steric interaction between the phenyl groups and thetert-butyl ligands results in the geometry about aluminum being significantly distorted from tetrahedral, with the AlC2 planes are pitched 62° with respect to the Al2O2 plane. The greater distortion from tetrahedral about aluminum, and the orientation of the phenoxide ring more nearly perpendicular to the M2O2 core as compared to that in [(tBu)2Ga(μ-OPh)]2 are all consistent with increasedtBu...Ph steric interaction as a consequence of the smaller M2O2 core for [(tBu)2Al(μ-OPh)]2. Crystal data: tetragonal, I41/acd,a=16.44(1),c=21.41(1) A,V=5788(7) A3,Z=8,R=0.047,R w=0.045.
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