Tetranuclear Copper complexes with new β—diketone and β—iminoketone—containing ligands

• 作者: LuqingYang XinJu
• 来源期刊: 同步辐射装置用户科技论文集
• 学科: 工学
• 关键词: 高分子材料 四核铜络合物 β-双酮 β-亚胺配合基
• 年，卷（期）: 1999,（1）
• 页码范围: 8-13
• 页数: 6页
• 分类号: TB324

摘要

Novel tetranuclear copper complexes,Cu4(OH)2(ClO4)3 (HA).H2O(1)and Cu4(ClO4)5(H3B).3H2O(2),were synthesized by reacting 1,5-bis(1'-phenyl-3'-methyl-5'-pyrazolone-4')-1,5--pentanedione with 1,3-propanediamine and 2-hydroxyl-1,3-propanediamine in the presence of a template reagent copper ion ,New[2+2] type open cyclic multidentate ligands are also obtained from the reaction(H4A) and H6B stand for new compounds from 1,3-propanediamine and 2-hydroxyl-1,3-propanediamine,respectively),They each contain five C=O ,three C=N and one NH2 group[s,The complexes were characterized by elemental analyses,conductivity,FR-i.r.electronic spectra and extended X-ray absorption fine structure(EXAFS),Copper ions in (1) are basically four coordinate with tetragonal geometry.The average coordination bond distances of Cu-N and Cu-O are 1.91 A and 2.05A .In(2).copper ions are primarily five coordinate with square-based pyramidal geometry.The average coordination bond distances of Cu-N and Cu-O are 1.93 A and 2.08 A.Four copper atoms in molecules may be arranged tetragonally.Both the ligand field and the coordination bonds in complex(1) are stronger than those in(2).Investigations on variable temperature susceptibilities show that some antiferromagnetic exchange interaction exist in the complexes,The plots of x-1 versus T obey the Curie-Weiss law only at low temperature.Preliminary results of a bioassay indicate that the two complexes have some antitumour activity in vitro.