Главная – Журналы – Журнал структурной химии 2013 номер 6

Two new solvated benzohydrazone derivatives N'-(4-hydroxy-3-nitrobenzylidene)-3-methylbenzohydrazide—methanol—water (2/1/1) 2(C ₁₅H ₁₃N ₃O ₄)×CH ₃OH×H ₂O (1) and N'-(4-dimethylaminobenzylidene)-3-methylbenzohydrazide methanol monosolvate C ₁₇H ₁₉N ₃O×CH ₃OH (2) are prepared and characterized by elemental analysis, ¹H and ¹³C NMR, and single crystal X-ray diffraction. Compound 1 crystallizes in the monoclinic space group P2 ₁/ c with unit cell dimensions a = 17.084(2) Å, b = 12.706(1) Å, c = 15.412(1) Å, β = 113.207(1)°, V = 3074.1(4) Å ³, Z = 4, R ₁ = 0.0567, and wR ₂ = 0.1209. Compound 2 crystallizes in the monoclinic space group P2 ₁/ n with unit cell dimensions a = 15.058(1) Å, b = 6.658(1) Å, c = 17.211(2) Å, β = 94.189(2)°, V = 1720.8(3) Å ³, Z = 4, Rsub>1 = 0.0611, and wR ₂ = 0.1594. X-ray diffraction indicates that the asymmetric unit of 1 contains two independent benzohydrazone molecules, one methanol and one water molecules. The asymmetric unit of 2 contains one benzohydrazone molecule and one methanol molecule. Benzohydrazone molecules of the compounds display trans configurations with respect to the C=N double bonds. The crystal structures of the compounds are stabilized by hydrogen bonds and weak π⋯π interactions.