Acta Crystallographica Section C

Crystal Structure Communications

Volume 57, Part 12 (December 2001)

Acta Cryst. (2001). C57, 1462-1464 [doi:10.1107/S0108270101017474]

4-Nitro-9,10-dihydrophenanthrene and a polymorphic form of 4-nitrophenanthrene

A. Sekine, H. Uekusa, Y. Ohashi, K. Yoshimura, M. Yagi and J. Higuchi

Abstract: The crystal structures of 4-nitro-9,10-dihydrophenanthrene, C₁₄H₁₁NO₂, (I), and 4-nitrophenanthrene, C₁₄H₉NO₂, (II), the latter having two crystallographically independent molecules, show that the molecules are not planar. The dihedral angles between the phenyl rings of the biphenyl skeletons are 28.64 (8)° for (I), and 10.34 (15) and 11.75 (13)° for the two molecules of (II). The differences in the dihedral angles have an effect on the photochemical reactivity of the molecules.

Formula: C₁₄H₁₁NO₂ and C₁₄H₉NO₂

Online 6 December 2001


	Structure factor file (CIF format) (86.5 kbytes) Contains datablock I

	Structure factor file (CIF format) (166.4 kbytes) Contains datablock II

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