Synthesis, spectra and redox properties of mononuclear five-co-ordinate copper(II) complexes with non-communicable pyrazole/pyridyl containing ligands
作者:Tapan Kumar Lal、Rajeev Gupta、Samiran Mahapatra、Rabindranath Mukherjee
DOI:10.1016/s0277-5387(99)00044-3
日期:1999.4
A representative complex [Cu(L2)(L4)](ClO4)2 8, having CuN5 co-ordination sphere, has been structurally characterized, to reveal square pyramidal stereochemistry at the copper(II) centre. Conductivity measurements revealed that one of the co-ordinated anions in 3, 5 and 6 is dissociated in solution, with the vacant site occupied by solvent molecule. Absorption and EPR spectral features of 1–8 represent
摘要使用三齿/双齿杂环氮供体配体与硬-软供体混合[L1 = 2,6-bis],完成了一系列五配位单核铜(II)化合物(1-8)的合成和表征(吡唑-1-基甲基)吡啶; L2 = 2,6-双(3,5-二甲基吡唑-1-基甲基)吡啶; L3 = 2-(吡唑-1-基甲基)吡啶; L4 = 2-(3,5-二甲基吡唑-1-基甲基)吡啶]。已合成了两种类型的配合物:(i)阴离子结合的配合物[Cu(L1 / L2)X2](X = Cl-1和2; N3-3和4; SCN-5和6)和(ii)混合-配体配合物[Cu(L1 / L2)(L3 / L4)](ClO4)2 7和8。配合物1-8仅属于少数具有这类非平面配体的铜(II)配合物,其中吡唑和吡啶环被亚甲基间隔基隔开。具有CuN5配位球的代表性复合物[Cu(L2)(L4)](ClO4)2 8,进行了结构表征,以揭示铜(II)中心的方形锥体立体化学。电导率测量表明