2-[1-(1-Phenylethyl)imidazolidin-2-ylidene]malononitrile

In the title compound, C14H14N4, the imidazolidine moiety is nearly planar, having an N—C—N—C torsion angle of 4.43 (3)°. The crystal structure is characterized by classical N—H⋯N hydrogen bonds, which form inversion dimers.

In the title compound, C 14 H 14 N 4 , the imidazolidine moiety is nearly planar, having an N-C-N-C torsion angle of 4.43 (3) . The crystal structure is characterized by classical N-HÁ Á ÁN hydrogen bonds, which form inversion dimers.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: RK2338).
ylidene)malononitrile group have attracted much interest because compounds containing a imidazole ring system are well known as efficient insecticide in pesticides, and have good plant-growth regulatory activity for a wide variety of crops (Hense, et al., 2002). We report herein the crystal structure of title compound.
In title molecule ( Fig. 1), the bond lengths and angles of the imidazolidin rings are in agreement with those in previous reports (Feng et al., 2008). The imidazolidin moiety has a small torsion angle N1-C11-N2-C10 = 4.43 (3)° which is nearly closed to a plane. The main plane of imidazolidin ring and the benzene ring make a dihedral angle of 87.18 (2)°.

Experimental
The title compound was prepared according Jeschke et al., 2002. Single crystals suitable for X-ray measurement were obtained by recrystallization from the mixture of acetone and methanol at room temperature.