Abstract
In the title compound, C19H12Cl2N2O4, the imine bond length of 1.257 (6) Å is typical of a double bond. The dihedral angle between the para-nitro benzene ring and the central benzene ring is 12.06 (3)° and that between the central benzene and the para-chloro benzene ring is 73.81 (2)°. An intramolecular O—H⋯N hydrogen bond generates an S(6) ring motif. In the crystal, molecules are linked together by two pairs of C—H⋯O interactions (to the same O atom acceptor), forming inversion dimers. A short Cl⋯Cl contact [3.232 (4) Å] is observed.
Highlights
In the title compound, C19H12Cl2N2O4, the imine bond length of 1.257 (6) Ais typical of a double bond
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: RN2114)
R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger
Summary
Key indicators: single-crystal X-ray study; T = 296 K; mean (C–C) = 0.009 A; R factor = 0.068; wR factor = 0.186; data-to-parameter ratio = 14.0. C19H12Cl2N2O4, the imine bond length of 1.257 (6) Ais typical of a double bond. The dihedral angle between the para-nitro benzene ring and the central benzene ring is 12.06 (3) and that between the central benzene and the para-chloro benzene ring is 73.81 (2). An intramolecular O— HÁ Á ÁN hydrogen bond generates an S(6) ring motif. Molecules are linked together by two pairs of C— HÁ Á ÁO interactions (to the same O atom acceptor), forming inversion dimers. Related literature For applications of related Schiff base compounds, see: Santos et al (2001); Cohen et al (1964). See: Allen et al (1987)
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