SPECTROSCOPIC INVESTIGATIONS OF DIMETHYLBERYLLIUM VAPORS

Variable-temperature infrared spectra of saturated and unsaturated vapors of dimethylberyllium have been recorded. Band assignments have been made in comparison with published spectra for M(CH3)2 compounds (M = zinc, cadmium, or mercury). The spectrum of the unsaturated vapor is consistent with a monomer with a linear C-Be-C skeleton. Band assignments are confirmed from analysis of the infrared spectrum of the deuterated analog. Mass spectral measurements confirm the presence of monomers only. Hyperconjugation effects are employed to explain the large beryllium-carbon bond strength and the unexpected stability of the monomer. © 1969, American Chemical Society. All rights reserved.