STRUCTURES OF 1,3-DI(9-CARBAZOLYL)PROPANE AND 1,5-DI(9-CARBAZOLYL)PENTANE - POLYVINYLCARBAZOLE MODEL COMPOUNDS

9,9'-Propylenedicarbazole, C27H22N2, M(r) = 374.49, monoclinic, P2(1)/c, a = 9.303 (3), b = 17.697 (3), c = 12.477 (3) angstrom, beta = 98.30 (3)-degrees, V = 2033 (2) angstrom3, Z = 4, D(m) = 1.221, D(x) = 1.224 g cm-3, lambda(Mo K-alpha) = 0.71073 angstrom, mu = 0.7 cm-1, F(000) = 792, T = 302 K, R = 0.075, wR = 0.095 for 1650 independent reflections with I greater-than-or-equal-to 3-sigma(I) and 262 variables. 9,9'-Pentylenedicarbazole, C29H26N2, M(r) = 402.54, monoclinic, P2(1)/c, a = 9.158 (3), b = 28.204 (8), c = 8.717 (3) angstrom, beta = 100.97 (3)-degrees, V = 2210 (2) angstrom3, Z = 4, D(m) = 1.21, D(x) = 1.210 g cm-3, lambda(Mo K-alpha) = 0.71073 angstrom, mu = 0.7 cm-1, F(000) = 856, T = 302 K, R = 0.054, wR = 0.052 for 2115 independent reflections with I greater-than-or-equal-to 2-sigma(I) and 280 variables. The stereochemistry of the carbazole substituents is gauche, anti for 1,3-di(9-carbazolyl)propane and gauche, gauche for 1,5-di(9-carbazolyl)pentane, two polyvinylcarbazole model compounds. Although no intramolecular interactions between carbazole rings are evident, one carbazole of each molecule associates in a shifted parallel planar orientation with that of another molecule.