trans-Cyclohexane-1,4-diyl bis(4-nitrophenyl) dicarbonate

oleh: Syed Nawazish Ali, Mitchell A. Winnik, Sabira Begum, Alan J. Lough

Format: Article
Diterbitkan: International Union of Crystallography 2008-01-01

Deskripsi

In the title crystal structure, C20H18N2O10, there are two independent molecules, both of which lie on crystallographic inversion centres. In one molecule the 4-nitrophenyl dicarbonate groups are substituted in equatorial (Aeq) positions of the chair-form cyclohexane ring while in the other molecule the substitution is axial (Bax). The dihedral angles between the atoms of the symmetry-unique carbonate group (O=CO2—) and benzene ring for each molecule are 47.3 (1)° for Aeq and 11.7 (2)° for Bax. In Bax, this facilitates the formation of a weak intramolecular C—H...O hydrogen bond, while the packing is stabilized by weak intermolecular C—H...O interactions.