Disordered structure of propane-1,2-diaminium dichloride

Abstract

In the title compound, C3H12N2 2+·2Cl−, the cations are disordered over two well resolved positions in a 0.525 (13):0.475 (13) ratio. The disorder involves two C atoms which assume positions that make an almost mirror-sym­metrical system. Similar disorder is observed both at room temperature and at 120 (1) K. The conformation of the NCCN chain in both components is close to trans (the torsion angles ca ±170°), while that of CCCN chain is close to gauche (±50°). In the crystal, a network of relatively strong N—H⋯Cl hydrogen bonds connects the cations and anions into one-cation-deep layers parallel to (001); there are R 2 4(8) and R 2 4(11) ring motifs within the plane. The planes are only loosely connected by van der Waals contacts and electrostatic inter­actions between cations and anions.

Propane-1,2-diammonium chromate(VI)

“…The 1,2-propanediammonium cation is characterized by N-C-C-N and N-C-C-C torsion angles of 164.88 14and -74.50 19 shows that the bond distances and angles show no significant difference from those obtained in other simple salts involving the same organic groups (Pospieszna-Markiewicz, et al, 2011;Gerrard, et al, 2002;Lee, et al, 2003;Todd, et al, 2005).…”

“…For background to organic chromates, see: Chebbi & Driss (2002, 2004; Srinivasan et al (2003). For the crystal structures of simple salts of the propane-1,2-diammonium cation, see: Pospieszna-Markiewicz et al (2011); Gerrard & Weller (2002); Lee & Harrison (2003); Todd & Harrison (2005). For a discussion on hydrogen bonding, see: Brown (1976); Blessing (1986).…”