The structure of 1,3-trans-bis(4-chlorophenyl)-2,4-trans-di(4-pyridyl)cyclobutane, a photodimer of 4'-chloro-4-styrylpyridine

V. Busetti, G. Valle, G. Zanotti, G. Galiazzo
1980 Acta Crystallographica Section B  
The crystal structure of 1, 3-trans-bis(4-chlorophenyl)-2,4-trans-di(4-pyridyl)cyclobutane, C26H20CI2N2, has been determined from 1765 three-dimensional intensities, collected with an automated Philips PW 1100 four-circle single-crystal diffractometer and refined to R = 0.058. Cell constants are a = 16.307 (8), b = 13.907 (2), c = 9.666 (3) A,/3 ---94.47 (5) °, z = 4; the space group is P21/n. The cyclobutane ring has a puckered conformation, and the two dihedral angles are 19.1 and 19.2 °. The
more » ... 9.1 and 19.2 °. The structure determined shows that the dimerization process is a head-to-tail reaction.
doi:10.1107/s0567740880004773 fatcat:dbj6g4z7tbbbrgwaq3tmwduly4