Crystaland molecular structure of 4,4'-bipyridinium bis(trans-2-hydroxycinnamate) bis(4,4'-bipyridine)

4,4'-Bipyridinium bis(trans-2-hydroxycinnamate) bis(4,4'-bipyridine), 0.5(C10H10N2)(2+) (C9H7O3)(-)center dot C10H8N2, crystallizes in triclinic system, space group P-1, with a = 7.4211(8) b = 9.9516(11) , c = 13.8587(15), beta = 92.510(2)A degrees, alpha = 96.772(2)A degrees, gamma = 99.164(2)A degrees, V = 1001.33(19) (3), rho(calc) = 1.321 g/cm(3), Z = 2. In the crystal, the whole trans-2-hydroxycinnamate is disordered over two sites with different occupancies. The molecular species are linked by O-Ha <-N and N-Ha <-O hydrogen bonds into five-molecule hydrogen bonded chain associates that are further linked by C-Ha <-O hydrogen bonds into layers with the major orientation of the disordered 2-hydroxycinnamate. However such hydrogen bonds are not observed with the minor orientation.