N,N′-Bis[2-(dimethylammonio)ethyl]oxamide dinitrate

Abstract

In the crystal structure of the title compound, C10H24N4O2 2+·2NO3 − or [H4dmaeoxd](NO3)2 {H2dmaeoxd is N,N′-bis[2-(dimethylamino)ethyl]oxamide}, the diprotonated H4dmaeoxd dication occupies a special position on an inversion centre and exhibits a transoid conformation. The six non-H atoms of the oxamide group are almost exactly coplanar. Two symmetry-independent NH groups of the dication form hydrogen bonds with two O atoms belonging to one NO3 − anion. Four independent C—H...O interactions link dications and anions into an infinite three-dimensional system.

2-{N′-[3-(Dimethylammonio)propyl]oxamido}benzoate

“…There is an intramolecular hydrogen bond between amido nitrogen atom (N1) and carboxyl oxygen atom (O2). The zwitterion has a transoid conformation, and six atoms of oxamido group are almost coplanar, which is similar to other oxamido compounds (Perić et al, 2001;Su et al, 1999;Sun et al, 2006). The dihedral angle between the oxamide and the benzene ring is 27.05 (12)°, and that between the benzene ring and carboxyl group is 23.9 (4)°.…”

“…For general background, see: Ojima & Nonoyama (1988); Matović et al (2005); Pei et al (1991); Zang et al (2003). For related structures, see: Perić et al (2001); Su et al (1999); Sun et al (2006). For synthesis, see: Matović et al (2005).…”

{μ-N,N′-Bis[2-(dimethylamino)ethyl]oxamidato(2–)-κ6N,N′,O′:N′′,N′′′,O}bis[(2,2′-bipyridine-κ2N,N′)copper(II)] bis(perchlorate)

“…in [H 4 dmaeoxd](NO 3 ) 2 (Sun et al, 2006) and that of 1.520 A Ê in compound (II). Due to the rigidity of the ligands, the pentacoordinated Cu II atom has a distorted square-pyramidal geometry.…”