摘要
合成了两个以含氮杂环芳基羧酸为配体的过渡金属配合物:[Mn(L)_2(CH_3OH)_2(H_2O)_2]·2H_2O(1)和[Co(L)_2(H_2O)_4]·2H_2O(2)(HL=4-(1-四氮唑基)苯甲酸),并采用.X-射线单晶衍射法测定了它们的晶体结构.分析结果表明,配合物1和2中的金属离子均采取八面体配位几何构型,但对相同配体的不同配位原子具有配位选择性:在1中,与 Mn(Ⅱ)配位的是羧基上的氧原子,而在2中,与 Co(Ⅱ)配位的是四氮唑基上的氮原子.另外,配合物1和2均通过分子间氢键作用将单核结构单元连接成三维超分子网络.
Two complexes[Mn(L)2(CH3OH)2(H2O)2·2H2O(1) and [Co(L)2(H2O)4]· 2H2O (2) (HL=4-(tetrazol-1-yl)benzoic acid), have been synthesized and characterized by elemental analysis, IR, and single-crystal X-ray diffraction analysis. The metal ions of 1 and 2 have similar coordination geometry, but they coordinated with different coordination groups of the same ligand (HL). Mn( Ⅱ ) ion coordinated with the O atom of carboxyl group in 1, while, Co( Ⅱ ) ion coordinated with the N atom of tetrazolyl group in 2. Furthermore, there are intermolecular H-bonding interactions in the two complexes to make the discrete mononuclear structures into 3D networks.
出处
《南开大学学报(自然科学版)》
CAS
CSCD
北大核心
2008年第1期81-86,共6页
Acta Scientiarum Naturalium Universitatis Nankaiensis
基金
天津市自然科学基金重点项目(07JCZDJC00500)