VIBRATION-SPECTRA AND FORCE CONSTANTS OF BORON TRIMETHYL AND RUBIDIUM TETRAMETHYLBORANATE

A more precise and extended evaluation of H/D- and 11B/10B-shifts was obtained from a new Raman and infraredspectroscopic examination of B(CH3)3 and B(CD3)3. A set of force constants is given including interaction terms which are sensitive to the observed isotopic shifts. The Raman and infrared spectra of MB(CH3)4 with M = Na, K, Rb have been examined. Force constants of the B(CH3)-4 anion are calculated from its fundamentals using a potential function comparable to that of B(CH3)3. © 1979.