(E)-2-[4-(2-Chlorophenyl)but-3-en-2-ylidene]malononitrile
نویسنده
چکیده
There are two independent but virtually identical mol-ecules in the asymmetric unit of the title compound, C(13)H(19)ClN(2). Each mol-ecular 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 (mol-ecule 1) and 0.056 Å (mol-ecule 2)]. An E configuration is found about each of the C=C bonds. The crystal packing is stabilized by C-H⋯N inter-actions that connect the independent mol-ecules into supra-molecular chains along the c-axis direction.
منابع مشابه
2-[(E)-4-(2-Bromophenyl)but-3-en-2-ylidene]malononitrile
The title compound, C(13)H(19)BrN(2), is planar structure except for the methyl H atoms, the maximum atomic deviation for the non-H atoms being 0.100 (1) Å. The bromo-phenyl and isopropanylidenemalononitrile units are located on opposite sides of the C=C bond, showing an E configuration.
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The title mol-ecule, C(14)H(11)FN(2), is approximately planar except the ethyl group, the maximum atomic deviation being 0.105 (5) Å. The fluoro-phenyl ring and 2-propyl-idene-malononitrile unit are located on the opposite sides of the C=C double bond, showing an E configuration.
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In the title compound, C(15)H(14)N(2)O, the mol-ecule skeleton displays an approximately planar structure except for the ethyl group [maximum deviation = 0.042 (1) Å]. The meth-oxy-phenyl ring and butanylidenemalononitrile groups are located on opposite sides of the C=C bond, showing an E configuration. Weak inter-molecular C-H⋯N hydrogen bonding is present in the crystal structure.
متن کامل(2E)-2-[2-(4-Chlorophenyl)hydrazin-1-ylidene]-4,4,4-trifluoro-3-oxobutanal
The title compound, C(10)H(6)ClF(3)N(2)O(2), was synthesized by coupling 4-dimethyl-amino-1,1,1-trifluoro-but-3-en-2-one with 4-chloro-benzene-diazo-nium chloride. It crystallizes with two mol-ecules in the asymmetric unit, which form two similar centrosymmetric dimers via hydrogen bonds. Extensive electron delocalization and intra-molecular N-H⋯O hydrogen bonds are responsible for a planar con...
متن کامل2-(1,2,3,4-Tetrahydrophenanthren-1-ylidene)malononitrile
In the title complex, C(17)H(12)N(2), the non-aromatic six-membered ring adopts an envelope conformation. The dihedral angle between the eight-membered plane containing the malononitrile group and the aromatic system is 25.88 (4)°. The distance from the central C atom of the malononitrile group to the centroid of the n-glide-related distal aromatic ring is 3.66 Å, suggesting π-π inter-actions.
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