Abstract

THE determined crystal structures of a number of primary alkyl ammonium halides indicate that in such compounds the carbon atoms are arranged collinearly1 in a particular group. Thus in the case of primary amyl ammonium chloride2 the X-ray diffraction data from powders and single crystals can be completely explained by a tetragonal unit of structure containing 2NH3C5H11Cl with a = b = 5.01 A., c = 16.69 A. The space group is D42, Vd3, S41, C4v1 C41 D4h7, and the CI, N and C atoms are at o½u, ½oū, with ucl = c. 0.095. The absence of reflections in odd orders from planes (hkO) with (h + k) odd and the intensities of reflections from other planes such as (200) require the carbon atoms of the C5H11 groups to scatter X-radiation as if they are arranged collinearly in each group.

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