M. Freytag, P. Jones
Nov 15, 1999
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Influential Citations
9
Citations
Journal
Acta Crystallographica Section C-crystal Structure Communications
Abstract
4-Hydroxypiperidinium iodide, C 5 H 12 NO + -I - , displays normal bond lengths and angles, but its crystal packing is unusual in involving four-centre hydrogen bonds from one NH group to two OH groups and one iodide anion as acceptors. 4-Methylpiperidinium 4-methylpiperidine-N-carboxylate hydrate, C 6 H 14 N + .C 7 H 12 NO 2 - .H 2 O, is formed when 4-methylpiperidine absorbs CO 2 from the air. The N atom of the anion is essentially planar, in contrast to that in the parent amine. Four classical hydrogen bonds, one from each donor, are involved in forming broad layers of residues parallel to the xy plane.