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Xin‐Hua Li Sai‐Zhen Yang 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(9):m423-m425
In the title centrosymmetric dimer, [Pb2(sbc)2(phen)2]·2H2O [sbc is the 2‐sulfonatobenzoate dianion (C7H4O5S) and phen is 1,10‐phenanthroline (C12H8N2)], each PbII ion is six‐coordinated by four O atoms, viz. carboxylate and sulfonate O atoms from two sbc anions, and two N atoms from a 1,10‐phenanthroline ligand. One 1,10‐phenanthroline ligand and the carboxylate group of one sbc ligand are chelated to each PbII cation, and the sulfonate group of the other sbc unit is monodentate. One O atom of the chelated carboxylate group also bridges to the other PbII cation, so that each pair of PbII ions is bridged by two sbc anions and has the same coordination environment, forming a dinuclear ring. Each pair of PbII ions is thus connected by two different kinds of bridges, namely a carboxylate short bridge and a carboxylate–sulfonate long bridge. There is also a special position of site symmetry at the centre of the two PbII cations. 相似文献
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Ming‐Lin Guo Feng‐Qin Wang 《Acta Crystallographica. Section C, Structural Chemistry》2010,66(7):m184-m187
The title complex, [CaCu(C5H6O4)2(H2O)2]n, is the first heterobimetallic complex based on a substituted malonate dianion. The CuII cation and two independent 2,2‐dimethylmalonate (or 2,2‐dimethylpropanedioate) dianions build up a robust dianionic [Cu(C5H6O4)2]2− complex, which acts as a building block to coordinate to four Ca2+ cations. Each CuII centre is in a four‐coordinate square plane of dimethylmalonate O atoms, while each CaII atom is in an eight‐coordinate distorted bicapped trigonal–prismatic environment of six O atoms from four different dimethylmalonate groups and two water molecules. This arrangement creates a two‐dimensional layer connectivity of the structure. The dianionic [Cu(C5H6O4)2]2− units are involved in different intermolecular hydrogen‐bonding interactions with water molecules via the formation of hydrogen‐bonded rings of graph sets R12(8) and R(6) within this layer. The crystal was nonmerohedrally twinned by rotation about [011] with a major twin volume fraction of 0.513 (3). 相似文献
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Seung Hoon Choi Ji Young Ryu Jun Yong Lee Young Chan Myoung Cheal Kim Youngmee Kim Byung Ho Song 《应用有机金属化学》2004,18(7):369-370
Four ligands of 1,3‐bis(4‐pyridyl)propane and two water molecules are coordinated to the zinc(II) atom so that the coordination geometry closely resembles a trans‐N4O2 octahedral environment. Copyright © 2004 John Wiley & Sons, Ltd. 相似文献
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