Bond Marcus R
Department of Chemistry, Southeast Missouri State University, Cape Girardeau, MO 63701, USA.
Acta Crystallogr C. 2010 Feb;66(Pt 2):m17-21. doi: 10.1107/S0108270109054560. Epub 2010 Jan 8.
The title compound, {(C(9)H(14)N)(2)[Cu(3)Cl(8)]}(n), consists of parallel chains of alternating quasiplanar Cu(2)Cl(6) and planar CuCl(4) complexes separated by trimethylphenylammonium cations. Both inorganic complexes possess inversion symmetry. Pairs of neighboring chloride ions of the CuCl(4) complex each form a symmetric bridge and an asymmetric bridge to Cu(2)Cl(6) complexes on either side. The Cu(2)Cl(6) complex contains two symmetric chloride bridges between the copper cations with a terminal chloride bound to each five-coordinated Cu(II) ion. The CuCl(4) complex completes its coordination environment by forming two long semicoordinate contacts to the bridging chloride ions of neighboring Cu(2)Cl(6) complexes. The use of the bridging rather than the terminal chloride ions to form semicoordinate contacts generates a new zigzag chain structure that differs from the straight chain structures found for other A(2)Cu(3)Cl(8) compounds. The zigzag chain structure is adopted so as to conform to the shorter repeat distance dictated by stacking of the organic cations.
标题化合物{(C₉H₁₄N)₂[Cu₃Cl₈]}ₙ由交替排列的准平面Cu₂Cl₆和平面CuCl₄配合物的平行链组成，这些链被三甲基苯基铵阳离子隔开。两种无机配合物都具有反演对称性。CuCl₄配合物中相邻的氯离子对分别与两侧的Cu₂Cl₆配合物形成一个对称桥和一个不对称桥。Cu₂Cl₆配合物在铜阳离子之间含有两个对称的氯桥，每个五配位的Cu(II)离子都有一个端基氯与之相连。CuCl₄配合物通过与相邻Cu₂Cl₆配合物的桥连氯离子形成两个长的半配位接触来完成其配位环境。使用桥连氯离子而非端基氯离子形成半配位接触产生了一种新的锯齿链结构，这与其他A₂Cu₃Cl₈化合物的直链结构不同。采用锯齿链结构是为了符合由有机阳离子堆积所决定的较短重复距离。
