Synthesis of a new binucleating ligand and its binuclear Cu(II) complex: X-ray crystal structure, spectral and electrochemical properties
摘要:
The preparation of a pentadentate binucleating ligand 2,6-bis[(N-methyl piperazin-1-yl)methyl]-4-cyano phenol (HL) is described together with the corresponding acetato bridged Cu(II) complex [Cu2L-(CH3COO)(2)]CO4. Both the ligand and the complex were characterized by elemental analysis and spectral studies. The electro-chemical behavior of the complex is discussed in detail. A Crystal structure analysis shows that the ligand is pentadentate donating two nitrogens as well as a bridging oxygen to each copper. Two acetates bridge the coppers through axial and apical positions to yield square-pyramidal coppers with a distorted square base. Perchlorates occupy interstitial positions. The structure is held in three-dimensional space by electrostatic attractions and Vander Waals forces. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.
The two piperazine rings of the title compound, C19H29N5O.H2O, assume a chair conformation and the exocyclic methyl groups in the piperazine rings are in equatorial positions. The best planes through the C atoms of the two piperazine rings make a dihedral angle of 40.1(1)degrees. The mean puckering amplitude for the piperazine moiety is 0.598(3)Angstrom. The structure is stabilized by O-H ... N intermolecular hydrogen bonding.
The preparation of a pentadentate binucleating ligand 2,6-bis[(N-methyl piperazin-1-yl)methyl]-4-cyano phenol (HL) is described together with the corresponding acetato bridged Cu(II) complex [Cu2L-(CH3COO)(2)]CO4. Both the ligand and the complex were characterized by elemental analysis and spectral studies. The electro-chemical behavior of the complex is discussed in detail. A Crystal structure analysis shows that the ligand is pentadentate donating two nitrogens as well as a bridging oxygen to each copper. Two acetates bridge the coppers through axial and apical positions to yield square-pyramidal coppers with a distorted square base. Perchlorates occupy interstitial positions. The structure is held in three-dimensional space by electrostatic attractions and Vander Waals forces. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.
作者:K. Gunasekaran、S. Shanmuga Sundara Raj、D. Velmurugan、T. M. Rajendran、M. Kandaswamy
DOI:10.1107/s010827019700214x
日期:1997.8.15
The two piperazine rings of the title compound, C19H29N5O.H2O, assume a chair conformation and the exocyclic methyl groups in the piperazine rings are in equatorial positions. The best planes through the C atoms of the two piperazine rings make a dihedral angle of 40.1(1)degrees. The mean puckering amplitude for the piperazine moiety is 0.598(3)Angstrom. The structure is stabilized by O-H ... N intermolecular hydrogen bonding.