N,N′-双(2-羟基-3-甲氧基苯甲基)草酰胺的合成及晶体结构研究

Studies on synthesis and crystal structure of N,N′-bis(2-hydroxy-3-methoxy-benzyl) oxalamide

设计合成一种新型对称的草酰胺桥联配体:N,N′-二(2-羟基-3-甲氧基苯甲基)草酰胺配体(H4L)。通过红外光谱、元素分析、核磁、熔点测定及晶体结构解析对其进行了表征。晶体结构研究表明配体H4L为反式桥联分子,晶体中存在两种氢键:一种是草酰胺基团的O原子与苯环上的酚羟基形成O—H…O氢键[d(O—H…O)=2.832(2),∠O—H…O=121.7°];另一种是草酰胺基团的氨基与苯环上的酚羟基O原子形成N—H…O氢键[d(N—H…O)=3.006(2),∠N—H…O=164.5°]。通过上述两种氢键将化合物H4L连接成二维网络结构。

A new oxalamide bridging ligand N, N＇-bis（2-hydroxy- 3-methoxy-benzyl） oxalamide （H4L） was designed and synthesized. The compound H4L was characterized by elemental analysis, IR spectrometry, NMR, melting point measurement and crystal structure analysis. The structural analysis indicated that the reverse symmetry ligand H4L molecules were linked into a 2D supermolecular network by two types of hydrogen bonds. One type of hydrogen bond occurred between the oxalamide oxygen group and the phenol hydroxyl group of the nearest molecule with d（O--H…O） =2.832（2） A^° and ∠O--H…O = 121.7°. The other type was found between the oxalamide nitrogen Group and the phenol hydroxyl group of another molecule with d （N--H…O） = 3.006（2）A^° and ∠N--H…O = 164.5°.