Influence of 1,4-dioxane solvent inclusion on the crystal structure of 5,5'-diphenyl-2,2'-(p-phenylene)di-1,3-oxazole (POPOP).
Crystallization of 5,5'-diphenyl-2,2'-(p-phenylene)di-1,3-oxazole (POPOP), C(24)H(16)N(2)O(2), from chloroform or 1,4-dioxane yielded crystals in pure and solvated forms, respectively. The solvated crystals of POPOP were found to contain 1,4-dioxane in a strict 1:2 compound-solvent stoichiometry, C(24)H(16)N(2)O(2) x C(4)H(8)O(2), thus being a defined solvent-inclusion compound. The crystal system is monoclinic in both cases and the asymmetric unit of the cell contains only half of the molecule (plus one dioxane molecule in the case of the solvated structure), owing to the centrosymmetry of the di-1,3-oxazole molecule.
Schindler
Diana
D
Institut für Organische Chemie, TU Bergakademie Freiberg, Leipziger Strasse 29, D-09596 Freiberg/Sachsen, Germany.
Felsmann
Marika
M
Weber
Edwin
E