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Short N+—H...Ph hydrogen bonds in ammonium tetraphenylborate characterized by neutron diffraction (2000)

Steiner, Thomas ; Mason, Sax A.

Copenhagen : International Union of Crystallography (IUCr)

Acta crystallographica 56 (2000), S. 254-260

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ISSN: 1600-5740

Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001

Topics: Chemistry and Pharmacology , Geosciences , Physics

Notes: The crystal structures of ammonium tetraphenylborate, NH4+·BPh4−, are determined by neutron diffraction at 20 and 293 K. At both temperatures, all four N—H vectors of the ammonium ion are time-average-oriented at the midpoints of the phenyl rings of neighboring anions. The N—H...Ph distances, H...M 2.067 and N...M 3.023 Å, are exceptionally short (M = aromatic midpoint). Even at 20 K the ammonium ion performs large amplitude motions which allow the N—H vectors to sample the entire face of the aromatic system.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1107/S0108768199012318

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