trans-Cyclo-hexane-1,4-diyl bis-(4-nitro-phen-yl) dicarbonate
Abstract:
In the title crystal structure, C(20)H(18)N(2)O(10), there are two independent mol-ecules, both of which lie on crystallographic inversion centres. In one mol-ecule the 4-nitro-phenyl dicarbonate groups are substituted in equatorial (A(eq)) positions of the chair-form cyclo-hexane ring while in the other mol-ecule the substitution is axial (B(ax)). The dihedral angles between the atoms of the symmetry-unique carbonate group (O=CO(2)-) and benzene ring for each mol-ecule are 47.3 (1)° for A(eq) and 11.7 (2)° for B(ax). In B(ax), this facilitates the formation of a weak intra-molecular C-H⋯O hydrogen bond, while the packing is stabilized by weak inter-molecular C-H⋯O inter-actions.
More Related Videos
Related Concept Videos
Disubstituted Cyclohexanes: cis-trans Isomerism
In cyclohexane, the substituents can occupy different positions generating distinct isomers.
Aromatic Hydrocarbon Cations: Structural Overview
Removing one hydrogen from the intervening CH2 group with both...
[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction
IUPAC Nomenclature of Carboxylic Acids
For acyclic saturated monocarboxylic acids, the longest hydrocarbon chain containing the –COOH carbon is identified as the parent chain. Then, the last -e of the parent hydrocarbon name is replaced with a suffix -oic acid.
Chair Conformation of Cyclohexane
The hydrogen atoms linked to carbons are arranged in two different axial and equatorial orientations to achieve this staggered...
Aromatic Hydrocarbon Anions: Structural Overview
Due to the absence of continuous overlap of p...


