Tai-Ran Kang

(E)-2-(1,3-Diphenyl-allyl-idene)malononitrile.

The title compound, C18H12N2, adopts an E conformation with the benzylidenemalononitrile and phenyl groups located on opposite sides of the C=C bond. The two phenyl rings are oriented at a dihedral angle of 62.49 (7)°.

(E)-N-Benzyl-2-cyano-3-phenyl­acryl­amide

In the title compound, C17H14N2O, the N-benzylformamide and phenyl groups are located on the opposite sides of the C=C bond, showing an E configuration; the terminal phenyl rings are twisted to each other at a dihedral angle of 63.61 (7)°. Intermolecular classical N—H⋯N and weak C—H⋯O hydrogen bonds occur in the crystal structure.

(E)-2-[4-(2-Chloro­phen­yl)but-3-en-2-yl­idene]malononitrile

There are two independent but virtually identical molecules in the asymmetric unit of the title compound, C13H19ClN2. Each molecular skeleton displays an approximately planar structure except for the methyl group [the r.m.s. deviations for all 16 non-H atoms are 0.039 (molecule 1) and 0.056 Å (molecule 2)]. An E configuration is found about each of the C=C bonds. The crystal packing is stabilized by C—H⋯N interactions that connect the independent molecules into supramolecular chains along the c-axis direction.

(E)-2-[1-(4-Fluoro­phen­yl)pent-1-en-3-yl­idene]malononitrile

The title molecule, C14H11FN2, is approximately planar except the ethyl group, the maximum atomic deviation being 0.105 (5) Å. The fluorophenyl ring and 2-propylidenemalononitrile unit are located on the opposite sides of the C=C double bond, showing an E configuration.

2-[(E)-4-(2-Bromo-phen-yl)but-3-en-2-yl-idene]malononitrile.

The title compound, C13H19BrN2, is planar structure except for the methyl H atoms, the maximum atomic deviation for the non-H atoms being 0.100 (1) Å. The bromophenyl and isopropanylidenemalononitrile units are located on opposite sides of the C=C bond, showing an E configuration.

3-(3-Cyano-phen-yl)-N-phenyl-oxirane-2-carboxamide.

In the title compound, C16H12N2O2, both terminal benzene rings are located at the same side of the central epoxide ring, showing a cis conformation. The epoxide ring makes dihedral angles of 76.59 (10) and 62.40 (11)° with the phenyl and cyanophenyl rings, respectively. Intermolecular N—H⋯O and weak C—H⋯O hydrogen bonding is present in the crystal structure.

2-[(E)-1-(4-Meth-oxy-phen-yl)pent-1-en-3-yl-idene]malononitrile.

In the title compound, C15H14N2O, the molecule skeleton displays an approximately planar structure except for the ethyl group [maximum deviation = 0.042 (1) Å]. The methoxyphenyl ring and butanylidenemalononitrile groups are located on opposite sides of the C=C bond, showing an E configuration. Weak intermolecular C—H⋯N hydrogen bonding is present in the crystal structure.

2-(7-Methyl-3-oxo-1-phenyl-perhydro-naphthalen-4a-yl)malononitrile.

In the title compound, C20H22N2O, both cyclohexane rings adopt chair conformations. Weak C—H⋯N and C—H⋯O hydrogen bonding is present in the crystal structure.

3-(1-Naphth­yl)-N-phenyl­oxirane-2-carboxamide

In the title compound, C19H15NO2, the molecule adopts a syn configuration with the naphthalene and N-phenylformamide units located on the same side of the epoxy ring. The epoxy ring makes dihedral angles of 58.73 (9) and 65.18 (9)°, respectively, with the naphthalene ring system and the benzene ring. Intermolecular N—H⋯O and C—H⋯O hydrogen bonding is present in the crystal structure.

(2R,3R)-3-(2-Chloro-phen-yl)-N-phenyl-oxirane-2-carboxamide.

In the title compound, C15H12ClNO2, the two benzene rings adopt a syn configuration with respect to the epoxy ring; the dihedral angles between the epoxy ring and the two benzene rings are 59.71 (16) and 67.58 (15)°. There is a weak intramolecular N—H⋯O bond, which may help to establish the conformation. In the crystal, the molecules are linked into a chain parallel to the b axis through intermolecular N—H⋯O hydrogen bonds.