Blake Alexander J, Lippolis Vito, Pivetta Tiziana, Verani Gaetano
School of Chemistry, The University of Nottingham, University Park, Nottingham NG7 2RD, England.
Acta Crystallogr C. 2007 Aug;63(Pt 8):m364-7. doi: 10.1107/S0108270107026753. Epub 2007 Jul 14.
In the first title salt, Cu(C(12)H(8)N(2))(2)(C(5)H(10)N(2)Se)(2), the Cu(II) centre occupies a distorted trigonal-bipyramidal environment defined by four N donors from two 1,10-phenanthroline (phen) ligands and by the Se donor of a 1,3-dimethylimidazolidine-2-selone ligand, with the equatorial plane defined by the Se and by two N donors from different phen ligands and the axial sites occupied by the two remaining N donors, one from each phen ligand. The Cu-N distances span the range 1.980 (10)-2.114 (11) A and the Cu-Se distance is 2.491 (3) A. Intermolecular pi-pi contacts between imidazolidine rings and the central rings of phen ligands generate chains of cations. In the second salt, Cu(C(10)H(8)N(2))(2)(C(3)H(6)N(2)S)(2), the Cu(II) centre occupies a similar distorted trigonal-bipyramidal environment comprising four N donors from two 2,2'-bipyridyl (bipy) ligands and an S donor from an imidazolidine-2-thione ligand. The equatorial plane is defined by the S donor and two N donors from different bipy ligands. The Cu-N distances span the range 1.984 (6)-2.069 (7) A and the Cu-S distance is 2.366 (3) A. Intermolecular pi-pi contacts between imidazolidine and pyridyl rings form chains of cations. A major difference between the two structures is due to the presence in the second complex of two N-H...O hydrogen bonds linking the imidazolidine N-H hydrogen-bond donors to perchlorate O-atom acceptors.
在第一种标题盐Cu(C₁₂H₈N₂)₂(C₅H₁₀N₂Se)₂中，Cu(II)中心处于一个扭曲的三角双锥环境中，该环境由来自两个1,10 - 菲咯啉（phen）配体的四个N供体和一个1,3 - 二甲基咪唑啉 - 2 - 硒酮配体的Se供体所定义，赤道平面由Se以及来自不同phen配体的两个N供体所界定，轴向位置由其余两个N供体占据，每个phen配体各提供一个。Cu - N距离范围为1.980(10) - 2.114(11) Å，Cu - Se距离为2.491(3) Å。咪唑啉环与phen配体的中心环之间的分子间π - π接触形成阳离子链。在第二种盐Cu(C₁₀H₈N₂)₂(C₃H₆N₂S)₂中，Cu(II)中心处于类似的扭曲三角双锥环境，由来自两个2,2' - 联吡啶（bipy）配体的四个N供体和一个咪唑啉 - 2 - 硫酮配体的S供体组成。赤道平面由S供体以及来自不同bipy配体的两个N供体所界定。Cu - N距离范围为1.984(6) - 2.069(7) Å，Cu - S距离为2.366(3) Å。咪唑啉环与吡啶环之间的分子间π - π接触形成阳离子链。这两种结构之间的一个主要差异是由于第二种配合物中存在两个N - H...O氢键，将咪唑啉的N - H氢键供体与高氯酸根的O原子受体相连。
