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The crystal and molecular structure of 4, 5-trans-2-amino-1, 3, 3-tri-cyano-4, 5-di(4-chlorophenyl) cyclopentene. ethanol - monohydrate has been deter-mined by X-ray diffraction method. The crystal (C20H12N4Cl2. C2H6O. H2O, Mr=443. 33) is triclinic with space group P1, a= 11. 033(4), b= 12. 199(3), c= 10. 732(3) A, a=114. 46(2), β=118. 33(3) γ=81. 56(3), V=1155- 1(7) A3, Z=2, Dc= 1. 275g/cm3, μ(MoKa) = 3. 05cm-1, F(000) = 460, R= 0. 070, Rw = 0. 089 for1965 observed reflections (I>3(I)). The phenyl groups are in equatorial positionsand form dihedral angles of 67. 89 and 63. 77° with the central 5-ring. X-ray analysisreveals that in the five membered ring the C (1) -C (2) bond is longer than normal double C=C bond while the C(2) -N (2) bond is shorter than normal C(sp)2-N bond.
The crystal and molecular structure of 4, 5-trans-2-amino-1, 3, 3-tri- cyano-4, 5- di (4-chlorophenyl) cyclopentene. diffraction method. The crystal (C20H12N4Cl2. C2H6O. H2O, Mr = 443.33) is triclinic with space group P1, a = 11. 033 (4), b = ) A, a = 114.46 (2), β = 118.33 (3) γ = 81.56 (3), V = 1155-1 (7) A3, Z = 2, Dc = 1. 275g / cm3 , μ (MoKa) = 3. 05cm-1, F (000) = 460, R = 0. 070, Rw = 0. 089 for 1965 observed reflections (I> 3 (I)). The phenyl groups are in equatorial positions and forms dihedral angles of 67. 89 and 63. 77 ° with the central 5-ring. X-ray analysisreveals that in the five membered ring the C (1) -C (2) bond is longer than normal double C = C bond while the C (2) -N (2) bond is shorter than normal C (sp) 2-N bond.