Research Article: N-[Amino(imino)methyl]uronium tetrafluoroborate

Date Published: April 01, 2012

Publisher: International Union of Crystallography

Author(s): Michaela Fridrichová, Jan Fábry, Karla Fejfarová, Radmila Krupková, Přemysl Vaněk.


In the title compound, C2H7N4O+·BF4−, inter­molecular N—H⋯O hydrogen bonds connect the cations into chains parallel to the c axis, with graph-set motif C(4). These chains are in turn connected into a three-dimensional network by inter­molecular N—H⋯F hydrogen bonds. The B—F distances distances in the anion are not equal.

Partial Text

For the non-centrosymmetric structure, containing a 2-carbamoylguanidinium cation, that is promising for applications in non-linear optics, see: Fridrichová, Němec, Císařová & Chvostová (2010 ▶); Fridrichová, Němec, Císařová & Němec (2010 ▶); Kroupa & Fridrichová (2011 ▶). For related stuctures and a detailed description of the preparation of the title cation, see: Fábry et al. (2012a ▶,b ▶,c ▶). For structures with rather strong N—H⋯F hydrogen bonds, see: Ali et al. (2007 ▶); Bardaji et al. (2002 ▶); Blue et al. (2003 ▶); Byrne et al. (2008 ▶); Zhao & Betley (2011 ▶). For information on fluorine as acceptor in organic hydrogen bonds, see: Dunitz & Taylor (1997 ▶). For hydrogen-bond classification and graph-set motifs, see: Desiraju & Steiner (1999 ▶); Etter et al. (1990 ▶). For a description of the Cambridge Structural Database (CSD), see: Allen (2002 ▶). For the extinction correction, see: Becker & Coppens (1974 ▶).