Knowledge Bank

High resolution proton magnetic resonance spectra are presented for $B2H6$, $B4H10$, $B5H9$, $B10H14$, $B2H3(CH3)3$, $B2H2(CH3)4$, $B2H5N(CH3)2$, $B3N3H6$, $NaBH4$, and $Al(BH4)3$. High resolution $B11$ magnetic resonance spectra are also presented for these substances. The details of both types of spectra are discussed in terms of chemical shift and spin-spin interaction multiplets, and are correlated with molecular structure assignments. Of particular interest is the problem presented by the spectra of $Al(BH4)3$. Neither to unsuspected dynamic feature of its molecular structure is strongly suggested.