VIBRATIONAL FREQUENCIES AND ASSIGNMENTS FOR SOME METALLIC BOROHYDRIDES

Abstract

“Raman spectra of the borohydride ion have been obtained from solutions of lithium, sodium, and potassium borohydrides dissolved in liquid ammonia at temperatures of about $-50^\circ C$. The investigation included the various isotopic species, $B^{11}H_{4}$, $B^{11}D^{-}_{4}$, $B^{10}H^{-}_{4}$, $B^{10}D^{-}_{4}$, and both $ND_{a}$ and $ND_{a}$ were used as solvents. All fundamentals were observed and a satisfactory assignment has been made which agrees with the polarization data and the product rule. The vibrational assignments of $Al(BH_{4})_{3}$ will be discussed briefly in terms of the Raman spectra of the four isotopic species in the liquid state at $0^\circ C$.”