(E)-1-(4-Fluorophenyl)ethan-1-one semicarbazone
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چکیده
In the title compound, C(9)H(10)FN(3)O, the semicarbazone group is nearly planar, with the maximum deviation of 0.044 (1) Å for one of the N atoms. The mean plane of semicarbazone group forms a dihedral angle of 30.94 (4)° with the benzene ring. The mol-ecules are linked into a supra-molecular chain by N-H⋯O hydrogen bonds formed along the c axis. The crystal structure is further stabilized by weak inter-molucular C-H⋯π inter-actions; the closest C⋯Cg contact is 3.6505 (11) Å.
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4-(3-Fluorophenyl)-1-(propan-2-ylidene)thiosemicarbazone
The title compound, C(10)H(12)FN(3)S, crystallizes in the same space group (P2(1)/c) as two polymorphic forms of 4-phenyl-1-(propan-2-yl-idene)thio-semicarbazone [Jian et al. (2005). Acta Cryst. E61, o653-o654; Venkatraman et al. (2005). Acta Cryst. E61, o3914-o3916]. The arrangement of mol-ecules relative to the twofold screw axes is similar to that in the crystal structure of the lower densit...
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In the title compound, C(9)H(9)Cl(2)N(3)O, the semicarbazone group is approximately planar, with an r.m.s deviation from the mean plane of 0.011 (2) Å. The dihedral angle between the least-squares planes through the semicarbazone group and the benzene ring is 38.76 (9)°. The crystal structure is further stabilized by N-H⋯O and C-H⋯O hydrogen bonding.
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In the title compound, C(9)H(10)BrN(3)O, the hydrazone portion and aliphatic chain are essentially coplanar [maximum deviation 0.057 (15) Å] and the mean plane makes a dihedral angle of 70.9 (6)° with the benzene ring. The main feature of the crystal structure is the inter-molecular N-H⋯O hydrogen bond, which links mol-ecules into zigzag chains along the a axis. These chains are further stacked...
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In the title compound, C(9)H(11)N(3)O, the benzene ring is disordered over two positions with refined occupancies of 0.922 (5) and 0.078 (5). The program PLATON [Spek (2009 ▶). Acta Cryst. D65, 148-155] recommends the solution in the space group C2/m with a = 7.3050 (3), b = 6.6745 (2), c = 18.3853 (6) Å and β = 96.986 (2)°. However, the large number of non-extinct reflections needed to be igno...
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