l-Lysinium trifluoroacetate

Abstract

Ions of the title compound, C6H15N2O2+·C2F3O2−, a new organic nonlinear optical crystal, are linked by N—H...O hydrogen-bonding interactions. Both the amino groups of the l-lysinium cation are protonated. A three-dimensional network of hydrogen bonds is observed, forming a closed ring. Intermolecular N—H...O hydrogen bonds involving l-lysinium cations and trifluoroacetate anions link the ions into extended chains which run parallel to the [010] direction. The F atoms of the trifluoroacetate anion are disordered over two sites with site occupancies of 0.423 (18) and 0.577 (18). The asymmetric unit consists of two cations and two anions.