S-Benzylisothiouronium nitrate

In the crystal structure of the title compound, C8H11N2S+·NO3 −, cations and anions are linked by intermolecular N—H⋯O hydrogen bonds, forming one-dimensional chains along [110].

In the crystal structure of the title compound, C 8 H 11 N 2 S + ÁNO 3 À , cations and anions are linked by intermolecular N-HÁ Á ÁO hydrogen bonds, forming one-dimensional chains along [110].
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: LH2669).

Comment
Organic molecular materials have many potential applications in integrated optics, and one of the most attractive applications is diode laser frequency doublers (Boyd, 1989). In the last two decades, extensive research has shown that organic crystals can exhibit nonlinear optical [NLO] efficiencies higher than those of inorganic materials (Zyss et al., 1984& Zaccaro et al., 1999. Organic nonlinear optical materials are often formed by weak Vander Waals and hydrogen bonds and hence posses high degree of delocalization. Organic materials are molecular materials that offer unique opportunities for fundamental research as well as for technological applications. The title compound (I) is potentially in the above category of materials, therefore we have undertaken its crystal structure determination.
The title molecule is shown in Fig. 1. The C-N, S-C bond lengths and C-S-C and N-C-N bond angles are comparable with the similar structure reported earlier (Barker & Powell, 1998). The bond angles for O1-N3-O3 is 128.7 (4); O1-N3-O2 is 116.7 (4); O3-N3-O2 is 114.6 (3), indicating slight deviations in the bond angle from the expected 120° in terms of the sp 2 hybridization. In the title crystal structure, C 8 H 11 N 2 S, NO 3 , cations and anions are linked by intermolecular N-H···O hydrogen bonds to form one-dimensional chains along [110] (Fig. 2).

Experimental
S-benzylisothiouronium chloride (SBTC) was synthesized as reported earlier (Hemalatha et al., 2006). The solutions of SBTC (5 g m) and potassium nitrate (5 g m) were prepared in water separately. These solutions were mixed together, and then stirred for 1 hr at room temperature. The precipitate was filtered off and washed with triple distilled water and the product was recrystallized from 0.2 M nitric acid. Single crystals were grown by slow evaporation of a solution of the title compound in water.