Note on the crystalline structures of the methyl cyanide–boron trihalides

Structure of Sulphamic Acid Molecule from a Three-dimensional Fourier Analysis

“…Only it will be of some interest to notice that this zwitterion type of sulphamic acid molecule may be regarded as an addition compound of pyramidal ammonia molecule NH3 and planar sulphur trioxide SO3, as in the cases of NH3-BF3 and the like which have been extensively studied by Hoard, Geller and others. [7][8][9][10][11][12][13][14] The flat shape of the SO, vvramid may suggest a * Quite recently (at a meeting of the Physical Society of Japan held in Nagoya in April, 1955) K. Sano of the Yamanashi University, Japan, reported his nuclear magnetic resonance absorption experiment of this crystal. In this connection it is remarked that the above-mentioned location of the three hydrogen atoms as forming a regular triangle is only a tentative one and the possibility of a deviation from such a regular arrangement is not excluded.…”

Reactions Of Boron Trichloride With Organic Compounds

“…By electron diffraction and vapor pressure measurements it was shown that the complex was almost completely dissociated in the vapor state, and its stability in the solid state has been attributed to the high crystal lattice energy (139). The crystalline structure of the complex by x-ray diffraction has been described (57). A number of other nitriles [R in RCN = CH3CH2 (126), n-C3H7 (75), n-C4H9, n-C,H", C6H5, CeH6CH2, p-CH3C6H4, p-CH3OC6H4, p-ClC6H4, p-N02C6H4, CH2=CH] have likewise been shown to form 1:1 complexes with boron trichloride.…”