Experimental

R factor = 0.020; wR factor = 0.043; data-to-parameter ratio = 15.2. In the title compound, [ZnCl2(C6H6FN)2], the Zn II atom has a slightly distorted tetrahedral geometry, being coordinated by the N atoms of two 4-fluoroaniline molecules and the two Cl anions. The two benzene rings are almost perpendicular to one another, making a dihedral angle of 89.96 (13). In the crystal, molecules are linked via pairs of N—H Cl hydrogen bonds, forming chains propagating along the b axis. These chains are in turn linked via a second pair of N—H Cl hydrogen bonds, forming a two-dimensional network parallel to the ab plane. The title compound crystallizes in the space group Pca21 and exhibits weak second harmonic generation (SHG) properties. Related literature For the measurement of second harmonic generation (SHG) conversion efficiency, see: Kurtz & Perry (1968). For the crystal structure of dichlorido-bis(p-chloroaniline)zinc, see: Subashini et al. (2012a) and for the crystal structure of dichlorodo-bis(p-bromoaniline)zinc, see: Subashini et al. (2012b); Feng et al. (2003)