Research Article: Triethyl­ammonium 1,3-dimethyl-5-(2,4,6-trinitro­phenyl)barbiturate

Date Published: August 01, 2012

Publisher: International Union of Crystallography

Author(s): Kulandaiya Rajamani, Doraisamyraja Kalaivani.

http://doi.org/10.1107/S1600536812030450

Abstract

In the title mol­ecular salt [systematic name: triethyl­ammonium 1,3-dimethyl-2,6-dioxo-5-(2,4,6-trinitro­phen­yl)-1,2,3,6-tetra­hydro­pyrimidin-4-olate], C6H16N+·C12H8N5O9−, the dihedral angle between the aromatic rings in the anion is 46.88 (8)°. The nitro group para to the ring junction is almost coplanar with its attached ring [dihedral angle = 0.76 (3)°], but the two ortho-nitro groups are substanti­ally twisted from the ring plane, by 47.91 (2) and 42.90 (1)°. In the crystal, the cation and anion are linked by an N—H⋯O=C hydrogen bond; these dimeric associations are further connected by weak C—H⋯O bonds to form linear supra­molecular chains extending in the [001] direction.

Partial Text

For background to barbiturates, see: Tripathi (2009 ▶). For our recent work in this area, see: Kalaivani & Buvaneswari, 2010 ▶); Kalaivani & Malarvizhi (2009 ▶); Buvaneswari & Kalaivani (2011 ▶); Babykala & Kalaivani (2012 ▶).

Source:

http://doi.org/10.1107/S1600536812030450