“…The bond lengths and angles in the quinoline moiety are in good agreement with those determined recently in 2-quinolinecarboxamide (Gdaniec, Jaskolski & Kosturkiewicz, 1977), biquinolyl (Lenner & Lindgren, 1976), and 8-quinolyl cyanomethyl sulphone (Harlow & Simonsen, 1976). In all these molecules the bond angle C (14)-N(13)-C(22) is, within experimental error, 117 °, the value being 5 ° less than the corre- Comparison of selected torsion angles in the title compound (A), (cinchoninium) 2+ cation (B), (+)-l O-bromo-10,11-dihydroepiquinidine ( C), and the quinidine salt of (-)-1, l '-dimethyl-3 (10) 28 (8) Thus, in terms of the classification given by Leiserowitz & Weinstein (1975), the structure of cinchonine can be described as the chiral packing arrangement of one-dimensional chiral hydrogen-bonded arrays.…”