Received 11 December 2012
In the title salt, C19H25N4O+·C24H20B-, the C=N and C-N bond lengths in the CN3 unit are 1.3327 (8)/1.3364 (9) and 1.3802 (9) Å, indicating double- and single-bond character, respectively. The N-C-N angles are 118.77 (6), 120.29 (6) and 120.81 (6)°, showing only a small deviation of the CN3 plane from an ideal trigonal-planar geometry. The bonds between the N atoms and the terminal methyl C atoms all have values close to a typical single bond [1.4636 (9)-1.4772 (9) Å]. The crystal packing is caused by electrostatic interactions between cations and anions.
For the synthesis and crystal structure of 3-[bis(dimethylamino)methylene]-1,1-diphenylurea, see: Tiritiris (2012). For the crystal structures of alkali metal tetraphenylborates, see: Behrens et al. (2012).
Data collection: APEX2 (Bruker, 2008); cell refinement: SAINT (Bruker, 2008); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg & Putz, 2005); software used to prepare material for publication: SHELXL97.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: FK2067 ).
The author thanks Dr W. Frey (Institut für Organische Chemie, Universität Stuttgart) for the data collection.
Behrens, U., Hoffmann, F. & Olbrich, F. (2012). Organometallics, 31, 905-913.
Brandenburg, K. & Putz, H. (2005). DIAMOND. Crystal Impact GbR, Bonn, Germany.
Bruker (2008). APEX2 and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
Tiritiris, I. (2012). Acta Cryst. E68, o3085.