David F. Hillenbrand

9Be NMR of beryllaboranes and other beryllium compounds

Abstract 9 Be has proved to be a very observable NMR nucleus, exhibiting a range of linewidths and chemical shifts somewhat smaller than that of 11 B. A selection of 9 Be NMR data for beryllaboranes is correlated with data from other beryllium compounds to illustrate the analytical value of 9 Be NMR in the area of beryllium chemistry.

The solute orientational order in a nematic binary solution by NMR

The orientational order of a solute (monofluorobenzene) dispersed in a nematogenic solvent (p,p′‐dihexyloxyazoxybenzene) is examined by NMR as functions of temperature and composition of the binary solution over the nematic phase region. The order is found to be solely characterized by the reduced temperature whereby a correspondence rule between T and mole fraction is established, and the coexistence curve of the nematic and isotropic phases is shown to serve as the minimum equiorder profile.

Gas-phase nuclear magnetic resonance spectroscopic study of the molecular structure of beryllium borohydride, Be(BH4)2

Gas-phase and solution n.m.r. spectral studies of beryllium borohydride, Be(BH4)2, indicate that is contains magnetically equivalent BH4 groups which undergo rapid internal hydrogen exchange; previously postulated triangular boron–beryllium–boron molecular configurations are inconsistent with the n.m.r. data.