共查询到20条相似文献,搜索用时 5 毫秒
1.
Birinchi K. Das Rama K. Barman 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(9):1025-1026
The title compound, [Cu2(C2H3O2)4(C6H4N2)2], has the familiar lantern‐type structure that is characteristic of dimetal tetracarboxylates of copper and several other transition elements. The molecule lies about an inversion centre and the Cu atom is present in a distorted square‐pyramidal coordination environment, consisting of four O atoms in equatorial positions and the pyridyl‐N atoms of the two 4‐cyanopyridine ligands in axial positions. 相似文献
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In the title compound, {[Co2(C14H8O4)2(C10H8N2)2(H2O)2]·2C14H10O4}n, each CoII ion is six‐coordinate in a slightly distorted octahedral geometry. Both CoII ions are located on twofold axes. One is surrounded by two O atoms from two biphenyl‐2,2′‐dicarboxylate (dpa) dianions, two N atoms from two 4,4′‐bipyridine (bpy) ligands and two water molecules, while the second is surrounded by four O atoms from two dpa dianions and two N atoms from two bpy ligands. The coordinated dpa dianion functions as a κ3‐bridge between the two CoII ions. One carboxylate group of a dpa dianion bridges two adjacent CoII ions, and one O atom of the other carboxylate group also chelates to a CoII ion. The CoII ions are bridged by dpa dianions and bpy ligands to form a chiral sheet. There are several strong intermolecular hydrogen bonds between the H2dpa solvent molecule and the chiral sheet, which result in a sandwich structure. 相似文献
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Yi‐Fang Deng Jin‐Sheng Xu Man‐Sheng Chen Chun‐Hua Zhang 《Acta Crystallographica. Section C, Structural Chemistry》2012,68(8):m219-m222
In the title compound, {[Co(C14H8N2O5)(C10H8N2)]·3H2O}n, the CoII cation is five‐coordinated with a slightly distorted trigonal–bipyramidal geometry, and the 5‐isonicotinamidoisophthalate ligands link CoII atoms into a layered structure. These two‐dimensional arrays are further pillared by rod‐like 4,4′‐bipyridine ligands to give a three‐dimensional framework with pcu (primitive cubic) topology. The magnetic and adsorption properties of the title compound are also discussed. 相似文献
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Xia Li Ying‐Quan Zou Hai‐Bin Song 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(3):m110-m111
Each La3+ ion in the title complex, tetra‐μ‐2‐fluorobenzoato‐κ10O:O′;O:O,O′;O:O′;O,O′:O′‐bis[aqua(4,4′‐bipyridine‐κN)(2‐fluorobenzoato‐κO)lanthanum(II)], [La(C7H4FO2)6(C10H8N2)2(H2O)2], is coordinated by six O atoms from the carboxylate groups of five 2‐fluorobenzoate ligands, one O atom from a water molecule and one N atom from a 4,4′‐bipyridine molecule, thus forming a dimeric molecule. An infinite one‐dimensional dimeric supramolecular chain is formed via intermolecular hydrogen bonds. 相似文献
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The title complex features a two‐dimensional polymeric structure owing to the presence of µ4‐bridging naphthalene‐1,4,5,8‐tetracarboxylate ligands. The trigonal bipyramidal coordination geometry for zinc is completed by a chelating 2,2′‐bipyridine and a water molecule. Copyright © 2004 John Wiley & Sons, Ltd. 相似文献
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Ivan Poto
k Michal Dunaj‐Jur
o Duan Miklo Werner Massa Lothar Jger 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(4):363-365
In the title compound, [Cu(C2N3)(C10H8N2)2]BF4, the CuII atom shows distorted trigonal‐bipyramidal geometry, with the dicyanamido ligand in the equatorial plane. The two out‐of‐plane Cu—N bond lengths to bipyridine are 2.006 (3) and 1.998 (3) Å, whereas the in‐plane Cu—N distances are 2.142 (3) and 2.043 (3) Å to the bipyridine, and 2.015 (3) Å to the dicyanamide. 相似文献
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Quan‐Zheng Zhang Can‐Zhong Lu 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(2):m78-m80
In the title compound, [Mn2(C7H6NO2)2(C2H3O2)2(C10H8N2)2], the two MnII atoms are each coordinated by one 2,2′‐bipyridyl molecule, one 4‐aminobenzoate ion and two acetate ions. The two Mn atoms exhibit different coordination environments: one is coordinated by two N and four O atoms, while the other is coordinated by two N and three O atoms. The two Mn atoms are bridged by two acetate ions in a syn–anti mode, with an Mn⋯Mn distance of 4.081 (1) Å. 相似文献
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Glen B. Deacon Catharina C. Quitmann Klaus Müller‐Buschbaum Gerd Meyer 《无机化学与普通化学杂志》2001,627(7):1431-1432
Transparent orange‐red crystals of [Yb(MeCp)2(O2CPh)]2 obtained by oxidation of Yb(MeCp)2 with Tl(O2CPh) in tetrahydrofuran have a dimeric structure with bridging bidentate (O,O′)‐benzoate groups and eight‐coordinate ytterbium. 相似文献
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Takayoshi Suzuki Hideo D. Takagi Kazuo Kashiwabara 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(2):m95-m97
Purple prismatic crystals of the title compound, [Co2(C3H6NS2)4(C8H11O2P)2](PF6)2, were obtained by repeated recrystallization of trans‐[Co(C3H6NS2)2‐(C8H11O2P)2]PF6 from CH3CN/Et2O and then from MeOH/CH2Cl2; during recrystallization one of the P(OMe)2Ph ligands was dissociated from the CoIII center and the resulting CoIII complex fragment underwent dimerization. The complex cation has a dinuclear structure bridged by one S atom of each of two of the N,N‐dimethyldithiocarbamate ligands, and has crystallographically imposed C2 symmetry. Two P(OMe)2Ph ligands are coordinated at the transoid positions of the Co2(μ‐C3H6NS2)2(C3H6NS2)2 moiety, with Co—P bond lengths of 2.1921 (11) Å. 相似文献
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Zi‐Liang Wang Ming‐Xue Li 《Acta Crystallographica. Section C, Structural Chemistry》2010,66(10):m311-m313
The asymmetric unit of the title two‐dimensional coordination polymer, [Co2(C16H6O8)(C14H14N4)2]n, contains one Co2+ ion, half of a biphenyl‐3,3′,4,4′‐tetracarboxylate (bptc) anion lying about an inversion centre and one 1,4‐bis(imidazol‐1‐ylmethyl)benzene (bix) ligand. The CoII atom is coordinated by three carboxylate O atoms from two different bptc ligands and two N atoms from two bix ligands constructing a distorted square pyramid. Each Co2+ ion is interlinked by two bptc anions, while each bptc anion coordinates to four Co atoms as a hexadentate ligand so that four CoII atoms and four bptc anions afford a larger 38‐membered ring. These inorganic rings are further extended into a two‐dimensional undulated network in the (10) plane. Two CoII atoms in adjacent 38‐membered rings are joined together by pairs of bix ligands forming a 26‐membered [Co2(bix)2] ring that is penetrated by a bptc anion; these components share a common inversion centre. 相似文献
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Trevor W. Hayton Peter Legzdins Steven J. Rettig 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(7):m377-m378
The title complex, [Mo2(C5H5)2(CH3O)2(C4H11Si)2(NO)2], is formed in high yield by treating [CpMo(NO)(CH2SiMe3)2] (Cp is cyclopentadienyl) with methanol. The nitrosyl ligands are nearly linear [O—N—Mo 170.1 (4) and 170.1 (5)°], with short Mo—N bonds [1.769 (4) and 1.776 (4) Å] and long N—O bonds [1.216 (5) and 1.201 (4) Å]. The central four‐membered Mo2O2 ring exhibits an average Mo—O bond length of 2.15 Å. 相似文献
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Yuan‐Yuan Gu Yan‐Tuan Li Zhi‐Yong Wu Wei Sun Man Jiang 《Acta Crystallographica. Section C, Structural Chemistry》2009,65(3):m115-m117
The title complex, bis[μ3‐cis‐N‐(2‐aminopropyl)‐N′‐(2‐carboxylatophenyl)oxamidato(3−)]‐1:2:4κ7N,N′,N′′,O:O′,O′′:O′′′;2:3:4κ7O′′′:N,N′,N′′,O:O′,O′′‐bis(2,2′‐bipyridine)‐2κ2N,N′;4κ2N,N′‐dichlorido‐1κCl,3κCl‐tetracopper(II) dihydrate, [Cu4(C12H12N3O4)2Cl2(C10H8N2)2]·2H2O, consists of a neutral cyclic tetracopper(II) system having an embedded centre of inversion and two solvent water molecules. The coordination of each CuII atom is square‐pyramidal. The separations of CuII atoms bridged by cis‐N‐(2‐aminopropyl)‐N′‐(2‐carboxylatophenyl)oxamidate(3−) and carboxyl groups are 5.2096 (4) and 5.1961 (5) Å, respectively. A three‐dimensional supramolecular structure involving hydrogen bonding and aromatic stacking is observed. 相似文献
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《Acta Crystallographica. Section C, Structural Chemistry》2017,73(5):420-423
Only a few cyclooctatetraene dianion (COT) π‐complexes of lanthanides have been crystallographically characterized. This first single‐crystal X‐ray diffraction characterization of a scandium(III) COT chloride complex, namely di‐μ‐chlorido‐bis[(η8‐cyclooctatetraene)(tetrahydrofuran‐κO )scandium(III)], [Sc2(C8H8)2Cl2(C4H8O)2] or [Sc(COT)Cl(THF)]2 (THF is tetrahydrofuran), (1), reveals a dimeric molecular structure with symmetric chloride bridges [average Sc—Cl = 2.5972 (7) Å] and a η8‐bound COT ligand. The COT ring is planar, with an average C—C bond length of 1.399 (3) Å. The Sc—C bond lengths range from 2.417 (2) to 2.438 (2) Å [average 2.427 (2) Å]. Direct comparison of (1) with the known lanthanide (Ln) analogues (La, Ce, Pr, Nd, and Sm) illustrates the effect of metal‐ion (M ) size on molecular structure. Overall, the M —Cl, M —O, and M —C bond lengths in (1) are the shortest in the series. In addition, only one THF molecule completes the coordination environment of the small ScIII ion, in contrast to the previously reported dinuclear Ln–COT–Cl complexes, which all have two bound THF molecules per metal atom. 相似文献
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Zhao‐Xun Lian Ping Liu Jia‐Min Zhang Tian‐Xi Wang Tian‐Jun Lou 《Acta Crystallographica. Section C, Structural Chemistry》2007,63(11):m525-m527
In the title compound, [V4O8(SeO3)2(C10H8N2)4], there are two distinct vanadium coordination environments. Alternating corner‐shared VO4N2 octahedra and SeO3 pyramids result in eight‐membered centrosymmetric V2Se2O4 rings. In addition, pairs of V centres form centrosymmetric V2O6N4 clusters via edge‐sharing. These two kinds of secondary building units are linked in an ABABAB fashion to give an infinite chain whose nature is unprecedented in Se–V–O systems. 相似文献
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Ricardo Baggio Juan Carlos Muoz Mireille Perec 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(10):m498-m500
The title compound, [Dy2(C2H3O2)6(H2O)4]·4H2O, crystallizes in the form of dimeric units related by an inversion centre. Each cation is nine‐coordinate, binding to two water molecules and three acetate groups, two of which are bidentate and the third tridentate. This last acetate group acts as a bridge between neighbouring metal atoms, leading to an intradimer Dy?Dy separation of 4.170 (1) Å. 相似文献