A. Haaland et al., MOLECULAR-STRUCTURE OF MONOMERIC (PENTAMETHYLCYCLOPENTADIENYL)ALUMINUM(I) BY GAS-PHASE ELECTRON-DIFFRACTION, Organometallics, 14(6), 1995, pp. 3116-3119
Gas-phase electron diffraction data of CpAl = (C(5)Me(5))AL, Me = CH3
, recorded with reservoir and nozzle temperatures of 139 +/- 4 degrees
C, show that the gas consists of monomeric (eta(5)-Cp)Al units. Leas
t-squares refinements of a molecular model of C-5v symmetry yield the
bond distances AI-C = 238.8(7), C-C(endocyclic) = 141.4(5), and C-C(ex
ocyclic) = 152.9(5) pm and a perpendicular metal-to-ring distance of 2
06.3(9) pm.