In the title structure, C21H16Cl2N2, the pyrazoline ring makes dihedral angles of 6.76 (9), 7.52 (10) and 81.88 (10)°, respectively, with the 4‐chloro­phenyl ring, the phenyl ring and the 2‐chlorophenyl ring. The 5‐phenyl ring is almost perpendicular to the pyrazoline ring.

Abstract:A new Zn(II) complex, [ZnL 2 (H 2 O) 4 ]·2H 2 O (1) (HL = N-nicotinoylglycine), was synthesized by Zn(OAc) 2 ·2H 2 O with N-nicotinoylglycine in 95% ethanol solution. Its structure has been determined by single-crystal X-ray diffraction, elemental analysis, and infrared spectrum. The crystal analysis show that complex 1 crystallizes in triclinic, space group P1. The Zn(II) ion, located on an inversion center, is coordinated by two N-nicotinoylglycine ligands through pyridine nitrogen and four water molecules. The crystal packing indicates 1D polymeric chains which expand into a 3D network structure by hydrogen bonds and π···π stacking. The luminescent properties of Zn(II) complex in solid state and in ethanol have also been investigated.

In the crystal structure of the title compound, C10H16N4O·2C2H4O2, the molecules interact by way of O—H...O and N—H...O hydrogen bonds, resulting in [010] chains built up from the 1‐[4‐(dimethylamino)benzylidene]semicarbazide molecule and one of the acetic acid molecules. The other acetic acid molecule forms isolated centrosymmetric dimers.

AbstractC15H14ClNO4, monoclinic, P21/n (no. 14), a = 14.188(3) Å, b = 5.6930(11) Å, c = 17.444(4) Å, β = 95.60(3)°, V = 1402.3(5) Å3, Z = 4, Rgt(F) = 0.0719, wRref(F2) = 0.2214, T = 293(2) K.

C8H6N2O1, monoclinic, P21/c (no. 14), a = 8.6277(17) Å, b = 13.134(3) Å, c = 13.062(5) Å, β = 110.54(3)°, V = 1386.0(7) Å3, Z = 8, Rgt(F) = 0.0512, wRref(F2) = 0.1581, T = 293(2) K.