以氯为中心的高核铜（II）簇的自组装。[Au(PPh3)2][反式-Cu6(μ-OH)6[μ-(3,5-CF3)2pz]6Cl]的结构和磁性
Self-assembly of a high-nuclearity chloride-centered copper(II) cluster. Structure and magnetic properties of [Au(PPh3)2][trans-Cu6(micro-OH)6[micro-(3,5-CF3)2pz]6Cl].
作者信息
Mohamed Ahmed A, Burini Alfredo, Galassi Rossana, Paglialunga Daniele, Galan-Mascarós José-Ramón, Dunbar Kim R, Fackler John P
机构信息
Laboratory for Molecular Structure and Bonding, Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, USA.
出版信息
Inorg Chem. 2007 Apr 2;46(7):2348-9. doi: 10.1021/ic062299d. Epub 2007 Mar 7.
A chloride-centered hexanuclear copper(II) pyrazolate [Au(PPh3)2][trans-Cu6(micro-OH)6[micro-(3,5-CF3)2pz]6Cl] is isolated from the reaction of the trinuclear copper(I) pyrazolate [Cu3[micro-(CF3)2pz]3] with PPh3AuCl and Ph3P in moist air. The six copper atoms are bridged by pyrazolate and hydroxyl ligands, above and below the copper plane. The chloride anion exists at the center of the planar cavity formed by the copper atoms with Cu-Cl distances of 3.02-3.13 A. The magnetic susceptibility measurements show a strong antiferromagnetic coupling between the copper centers with an estimated exchange constant of J approximately 650 cm-1.
从三核铜（I）吡唑酸盐[Cu3[μ-(CF3)2pz]3]与PPh3AuCl和Ph3P在潮湿空气中的反应中分离出一种以氯为中心的六核铜（II）吡唑酸盐[Au(PPh3)2][反式-Cu6(μ-OH)6[μ-(3,5-CF3)2pz]6Cl]。六个铜原子由吡唑酸盐和羟基配体在铜平面的上方和下方桥连。氯离子存在于由铜原子形成的平面空腔的中心，Cu-Cl距离为3.02 - 3.13 Å。磁化率测量表明铜中心之间存在强反铁磁耦合，估计交换常数J约为650 cm-1。
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