Synthesis, Crystal Structures, and Antibacterial Activity of Two Hydrazone Derivatives 3-Methoxy-N′-(3,5-Dibromo-2-Hydroxybenzylidene)Benzohydrazide Methanol Solvate and 3-Methoxy-N′-(2,4-Diclorobenzylidene)Benzohydrazide
作者:San-Jun Peng
DOI:10.1007/s10870-010-9873-9
日期:2011.3
Two new hydrazone compounds with the formulae C15H12Br2N2O3·CH3OH (1) and C15H12Cl2N2O2 (2), were prepared and characterized by elemental analysis, IR spectra and single-crystal X-ray determination. Compound (1) crystallizes in the triclinic space group P-1 with unit cell dimensions a = 7.654(1) Å, b = 13.801(2) Å, c = 16.904(2) Å, α = 90.772(2)o, β = 101.721(2)o, γ = 95.891(2)o, V = 1738.1(4) Ǻ3, Z = 4, R 1 = 0.0495 and wR 2 = 0.1161. Compound (2) crystallizes in the triclinic space group P-1 with unit cell dimensions a = 8.296(1) Å, b = 12.987(2) Å, c = 14.121(2) Å, α = 88.922(2)o, β = 87.960(2)o, γ = 84.130(2)o, V = 1512.3(4) Ǻ3, Z = 4, R 1 = 0.0526 and wR 2 = 0.1220. The single crystal structure analysis indicates that compound (1) consists of two nearly coplanar hydrazone molecules and two methanol molecules which link to the hydrazone molecules through O–H···O hydrogen bonds, while compound (2) consists of two independent distorted hydrazone molecules. In the crystal structure of (1), adjacent two hydrazone molecules are linked with methanol molecules through intermolecular hydrogen bonds of O–H···O and N–H···O, forming a dimer. In the crystal structure of (2), molecules are linked through intermolecular N–H···O hydrogen bonds, forming chains running along the a axis. Two new hydrazone derivatives were prepared and characterized by elemental analysis, IR spectra and single-crystal X-ray determination. Both structures are stabilized by intermolecular O–H···O and/or N–H···O hydrogen bonds and weak π···π interactions. The biological tests indicate that both compounds are excellent antibacterial materials.
通过元素分析、红外光谱和单晶 X 射线测定,制备了两种新的腙化合物,其化学式分别为 C15H12Br2N2O3-CH3OH (1) 和 C15H12Cl2N2O2 (2)。化合物 (1) 在三linic 空间群 P-1 中结晶,单胞尺寸 a = 7.654(1) Å,b = 13.801(2) Å,c = 16.904(2) Å,α = 90.772(2)o,β = 101.721(2)o,γ = 95.891(2)o,V = 1738.1(4) Ǻ3,Z = 4,R 1 = 0.0495,wR 2 = 0.1161。化合物 (2) 在三菱空间群 P-1 中结晶,单胞尺寸 a = 8.296(1) Å,b = 12.987(2) Å,c = 14.121(2) Å,α = 88.922(2)奥,β = 87.960(2)奥,γ = 84.130(2)奥,V = 1512.3(4) Ǻ3,Z = 4,R 1 = 0.0526,wR 2 = 0.1220。单晶结构分析表明,化合物(1)由两个几乎共面的腙分子和两个甲醇分子组成,甲醇分子通过 O-H-O 氢键与腙分子相连,而化合物(2)则由两个独立的变形腙分子组成。在 (1) 的晶体结构中,相邻的两个腙分子通过 O-H-O 和 N-H-O 分子间氢键与甲醇分子相连,形成二聚体。在(2)的晶体结构中,分子通过分子间的 N-H-O 氢键相连,形成沿 a 轴延伸的链。我们制备了两种新的腙衍生物,并通过元素分析、红外光谱和单晶 X 射线测定对其进行了表征。这两种结构都通过分子间的 O-H-O 和/或 N-H-O 氢键以及微弱的 π--π 相互作用而得到稳定。生物测试表明,这两种化合物都是优良的抗菌材料。