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1 citation found for Suina, A.

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Syntheses and X-ray structural investigations have been carried out for the two title compounds, viz. C17H17N3O2, (I), and C22H20N2O2, (II). The molecular skeleton of (I) is slightly non-planar; the dihedral angles between the conjugated linkage and the p-(di­methyl­amino)­phenyl ring, and between the linkage and the p-nitro­phenyl ring are 13.0 (2) and 13.8 (2)°, respectively. The dihedral angle between the slightly pyramidal di­methyl­amine substituent and the aromatic ring is 23.3 (1)°. The molecular skeleton of (II) is not planar; the dihedral angles between the conjugated linkage and the naphthalene ring, and between the linkage and the substituted phenyl ring are 36.1 (2) and 2.7 (3)°, respectively. The di­methyl­amine substituent in (II) has a pyramidal geometry; the dihedral angle between this substituent and the naphthalene ring is 71.7 (1)°. The dihedral angle between the nitro group and the plane of the substituted phenyl ring is 9.0 (3)°. There is a weak intermolecular C—H...O hydrogen bond in the crystal structure of (II), which links the mol­ecules into centrosymmetric dimers. Molecular mechanics calculations of molecular conformations have shown that the crystal environment influences the conformation more in (I) than in (II).

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