共查询到20条相似文献,搜索用时 31 毫秒
1.
Graeme J. Gainsford Tim Kemmitt 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(4):m206-m208
In the polymeric title compound, [Na2(C4H12BO4)2(CH4O)2]n, the two independent sodium cations are bound by five O atoms. All the O atoms of one tetramethoxyborate anion bind cations, forming a tetrameric cluster around a tetragonal inversion centre [Na—O = 2.2777 (18)–2.3907 (16) Å]. Two methanol O atoms bridge the two Na atoms [Na—O = 2.3590 (15)–2.4088 (18) Å] and provide the hydrogen‐bonding H atoms. The second tetramethoxyborate anion provides two O atoms to one Na atom [mean Na—O = 2.31 (2) Å] and two O atoms as donors for crosslinking hydrogen bonds to adjacent tetramers, which complete the three‐dimensional packing. The crystal was a treated as a racemic twin. 相似文献
2.
Claude Villiers Pierre Thury Michel Ephritikhine 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(6):m243-m245
In the title compound, (1,4,7,10,13,16‐hexaoxacyclooctadecane‐1κ6O)‐μ‐oxo‐1:2κ2O:O‐hexakis(tetrahydroborato)‐1κ3H;2κ2H;2κ2H;2κ3H;2κ3H;2κ3H‐diuranium(IV), [U2(BH4)6O(C12H24O6)], one of the U atoms (U1), located at the centre of the crown ether moiety, is bound to the six ether O atoms, and also to a tridentate tetrahydroborate group and a μ‐oxo atom in axial positions. The other U atom (U2) is bound to the same oxo group and to five tetrahydroborate moieties, three of them tridentate and the other two bidentate. The two metal centres are bridged by the μ‐oxo atom in an asymmetric fashion, thus giving the species (18‐crown‐6)(κ3‐BH4)U=(μ‐O)—U(κ3‐BH4)3(κ2‐BH4)2, in which the U1=O and U2—O bond lengths to the μ‐O atom [1.979 (5) and 2.187 (5) Å, respectively] are indicative of the presence of positive and negative partial charges on U1 and U2, respectively. 相似文献
3.
Fred B. Stocker Doyle Britton 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(7):798-800
Gold(I) cyanide forms complexes with imidazolidine‐2‐thione (etu) and dimethylthiourea (dmtu) with the formula [Au2(CN)2L2], i.e. the title complexes dicyano‐1κC,2κC‐bis(imidazolidine‐2‐thione)‐1κS,2κS‐digold(I)(Au—Au), [Au2(CN)2(C3H6N2S)2], and dicyano‐1κ2C‐bis(N,N′‐dimethylthiourea)‐2κ2S‐digold(I)(Au—Au), [Au2(CN)2(C3H8N2S)2]. In the etu complex, two approximately linear (etu)AuCN groups are held together by a weak homopolar Au—Au bond [3.117 (1) Å], with a torsion angle of 61 (3)° between the two groups. In the dmtu complex, an approximately linear Au(dmtu)2 group is bound to an approximately linear Au(CN)2 group by a weak heteropolar Au—Au bond [3.091 (1) Å], with a torsion angle of 83 (5)° between the two groups. 相似文献
4.
Neil M. Boag Kathleen M. Coward Anthony C. Jones Martyn E. Pemble J. Robin Thompson 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(12):1438-1439
The hydrolysis product [Ga2(C3H7)4(OH)2]·C14H32N4, derived from the tetrakis(triisopropylgallium)–1,4,8,11‐tetramethyl‐1,4,8,11‐tetraazacyclotetradecane (1/1) adduct, consists of a centrosymmetric [iPr2Ga(μ‐OH)]2 unit hydrogen bonded through the hydroxyl group to a nitrogen on an adjacent centrosymmetric 1,4,8,11‐tetramethyl‐1,4,8,11‐tetraazacyclotetradecane molecule, resulting in the generation of a molecular chain through the crystal. 相似文献
5.
Zhi‐Feng Li Hong‐Zhen Xie Yue‐Qing Zheng 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(10):m455-m457
In the title compound, [Ni2(C12H8O12)(C12H8N2)2]n, the 3,6‐dicarboxycyclohexane‐1,2,4,5‐tetracarboxylate (H2chhc4−) anion has crystallographically imposed C2 symmetry and bridges the six‐coordinate Ni atoms to generate polymeric [Ni2(H2chhc)2/2(C12H8N2)2] chains extending in the [010] direction. The coordination polymer chains are linked into a three‐dimensional framework by O—H⋯O and C—H⋯O hydrogen bonds. 相似文献
6.
Uwe‐Christoph Knig Michael Berkei Claudia Hirsch Hans Preut Terence Nigel Mitchell 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(10):e450-e451
The synthesis and the X‐ray structural analysis of the title compound, μ‐chloro‐1:2κ2Cl‐trichloro‐1κCl,2κ2Cl‐tetramethyl‐1κ2C,2κ2C‐(N‐methylpyrrolidin‐2‐one)‐1κO‐ditin(IV), [Sn2Cl4(CH3)4(C5H9NO)], are described. The title compound is found to exhibit a distorted trigonal–bipyramidal geometry at both SnIV atoms. The Sn—Cl—Sn angle involving the bridging chlorine ligand is 135.56 (5)°, with the Sn—Cl bond lengths being 2.5704 (13) and 3.1159 (13) Å. 相似文献
7.
Ana María Atria Ricardo Baggio María Teresa Garland Piedad Corts 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(7):m311-m314
The three title compounds, namely 4‐phenyl‐1H‐imidazolium hexa‐μ2‐chloro‐chloro‐μ4‐oxo‐tris(4‐phenyl‐1H‐imidazole‐κN1)tetracopper(II) monohydrate, (C9H9N2)[Cu4Cl7O(C9H8N2)3]·H2O, hexa‐μ2‐chloro‐μ4‐oxo‐tetrakis(pyridine N‐oxide‐κO)tetracopper(II), [Cu4Cl6O(C5H5NO)4], and hexa‐μ2‐chloro‐tetrakis(2‐methyl‐1H‐imidazole‐κN1)‐μ4‐oxo‐tetracopper(II) methanol trisolvate, [Cu4Cl6O(C4H6N2)4]·3CH4O, exhibit the same Cu4OCl6 framework, where the O atom at the centre of an almost regular tetrahedron bridges four copper cations at the corners. This group is in turn surrounded by a Cl6 octahedron, leading to a rather globular species. This special arrangement of the CuII cations results in a diversity of magnetic behaviours. 相似文献
8.
Paul V. Bernhardt Nathan L. Kilah 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(5):m245-m249
The pendent‐arm macrocyclic hexaamine trans‐6,13‐dimethyl‐1,4,8,11‐tetraazacyclotetradecane‐6,13‐diamine (L) may coordinate in tetra‐, penta‐ or hexadentate modes, depending on the metal ion and the synthetic procedure. We report here the crystal structures of two pseudo‐octahedral cobalt(III) complexes of L, namely sodium trans‐cyano(trans‐6,13‐dimethyl‐1,4,8,11‐tetraazacyclotetradecane‐6,13‐diamine)cobalt(III) triperchlorate, Na[Co(CN)(C13H30N6)](ClO4)3 or Na{trans‐[CoL(CN)]}(ClO4)3, (I), where L is coordinated as a pentadentate ligand, and trans‐dicyano(trans‐6,13‐dimethyl‐1,4,8,11‐tetraazacyclotetradecane‐6,13‐diamine)cobalt(III) trans‐dicyano(trans‐6,13‐dimethyl‐1,4,8,11‐tetraazacyclotetradecane‐6,13‐diaminium)cobalt(III) tetraperchlorate tetrahydrate, [Co(CN)2(C14H32N6)][Co(CN)2(C14H30N6)](ClO4)4·4H2O or trans‐[CoL(CN)2]trans‐[Co(H2L)(CN)2](ClO4)4·4H2O, (II), where the ligand binds in a tetradentate mode, with the remaining coordination sites being filled by C‐bound cyano ligands. In (I), the secondary amine Co—N bond lengths lie within the range 1.944 (3)–1.969 (3) Å, while the trans influence of the cyano ligand lengthens the Co—N bond length of the coordinated primary amine [Co—N = 1.986 (3) Å]. The Co—CN bond length is 1.899 (3) Å. The complex cations in (II) are each located on centres of symmetry. The Co—N bond lengths in both cations are somewhat longer than in (I) and span a narrow range [1.972 (3)–1.982 (3) Å]. The two independent Co—CN bond lengths are similar [1.918 (4) and 1.926 (4) Å] but significantly longer than in the structure of (I), again a consequence of the trans influence of each cyano ligand. 相似文献
9.
Cassandra J. Martin David C. R. Hockless Max R. Taylor Lisandra L. Martin 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(12):e549-e549
The previously unknown title compound, tetra‐μ‐acetato‐1:2κ2O;1:2κ2O:O′;2:3κ2O;2:3κ2O:O′‐diaqua‐1κO,3κO‐bis(μ‐2‐{[N‐ethyl‐N‐(2‐hydroxy‐5‐methylbenzyl)amino]methyl}‐1‐methyl‐1H‐benzimidazole)‐1κ3N3,N,O:2κO;3κ3N3,N,O:2κO‐trinickel(II) tetrahydrate, [Ni3(C18H22N3O)2(C2H3O2)4(H2O)2]·4H2O, (I), is a centrosymmetric linear trinuclear nickel(II) complex, where the Ni atoms are in an octahedral coordination and the ligand heteroatoms act so as to model amino acid residues. 相似文献
10.
Janet M. S. Skakle Marcus V. D. Rangel e Silva James L. Wardell Solange M. S. V. Wardell 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(10):m413-m415
The title compound, [Cu(C2H3N)2(C10H24N4)](C32H12BF24)2·0.31H2O, crystallizes as an ionic species with no interactions between the ions. The [CuII(cyclam)(MeCN)2]2+ dication (cyclam is 1,4,8,11‐tetraazatetradecane), located on a 2/m symmetry site, forms as a distorted octahedral species with four Cu—Ncyclam bonds of 2.013 (2) Å and two C—NMeCN bonds of 2.499 (4) Å. The [B{C6H3(CF3)‐3,5}4]− anion, located on a twofold axis, is a distorted octahedral species. A small amount of water is present, occupying sites between columns of ions. 相似文献
11.
Jose E. Cortes‐Figueroa Madeline S. Leon‐Velazquez Johanna Ramos Jerry P. Jasinski David A. Keene Jeffrey D. Zubkowski Edward J. Valente 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(12):1435-1437
In the present redetermination of the complex cis‐tetracarbonylbis(tricyclohexylphosphine)molybdenum(0), (I), [Mo(C18H33P)2(CO)4] or cis‐{η1‐[P(C6H11)3]2}Mo(CO)4, the Mo atom has a distorted octahedral geometry with a large P—Mo—P angle of 104.8 (1)°. A strong trans influence on the carbonyls in (I) is seen in a shortening of the Mo—C and a lengthening of the C—O distances opposite the phosphines compared with those that are cis. This influence is greatly diminished in the complex pentacarbonyl(tricyclohexylphosphine)molybdenum(0), (II), [Mo(C18H33P)(CO)5] or {η1‐[P(C6H11)3]}Mo(CO)5, the core of which has a slightly distorted C4v geometry. 相似文献
12.
brahim Uar Ahmet Bulut Okan Zafer Yeilel Halis
lmez Orhan Büyükgüngr 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(11):m563-m566
The title mononuclear complex, [Ni(C5H2N2O4)(C3H4N2)2(H2O)2] or [Ni(HOr)(im)2(H2O)2] (im is imidazole and H3Or is orotic acid, or 2,6‐dioxo‐1,2,3,6‐tetrahydropyrimidine‐4‐carboxylic acid), has been synthesized and the crystal structure determination is reported. The NiII ion in the complex has a distorted octahedral coordination geometry comprised of one deprotonated pyrimidine N atom and the adjacent carboxylate O atom of the orotate ligand, two tertiary imidazole N atoms and two aqua ligands. An extensive three‐dimensional network of OW—H⋯O and N—H⋯O hydrogen bonds, and π–π and π–ring interactions are responsible for crystal stabilization. 相似文献
13.
Elbieta Jesionka Anna Ciborska Wieslaw Wojnowski Jaroslaw Chojnacki 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(7):m321-m323
The title compounds, μ‐(tri‐tert‐butoxysilanethiolato‐κ2S:S)‐bis[(tetrahydrofuran‐κO)lithium(I)], [Li2(C12H27O3SSi)2(C4H8O)2], (I), and catena‐poly[[bis(μ‐tri‐tert‐butoxysilanethiolato)‐1:2κ2S;1κS:2κS,O‐dilithium(I)]‐μ‐dimethoxyethane‐κ2O:O′], [Li2(C12H27O3SSi)2(C4H10O2)]n, (II), were obtained by the reaction of tri‐tert‐butoxysilanethiol with metallic lithium. The crude product, when recrystallized from tetrahydrofuran (THF) yields (I), and when recrystallized from 1,2‐dimethoxyethane (DME) gives (II). Compound (I) forms centrosymmetric dimers in the solid state with an Li2S2 central core, whereas (II) forms infinitely long chains, in which the centrosymmetric dimeric units are linked together by the bidentate DME ligand (also residing on an inversion centre), thus forming a coordination polymer. The formation of a one‐dimensional structure in (II) is a consequence of replacement of a monodentate THF solvent molecule with a bidentate DME molecule. 相似文献
14.
Graham King Philip Coppens Milan Gembicky 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(7):m329-m332
Two new salts of the cation [CuI(dmp)2]+ (dmp is 2,9‐dimethyl‐1,10‐phenanthroline, C14H12N2), namely bis[bis(2,9‐dimethyl‐1,10‐phenanthroline‐κ2N,N′)copper(I)] bis(hexafluorophosphate) hemi[bis(4‐pyridylmethylidene)hydrazine] acetonitrile solvate, [Cu(C14H12N2)2]2(PF6)2·0.5C12H10N4·C2H3N or [Cu(dmp)2]2(PF6)2·0.5(bpmh)·CH3CN [bpmh is bis(4‐pyridylmethylidene)hydrazine, C12H10N4], (I), and bis(2,9‐dimethyl‐1,10‐phenanthroline‐κ2N,N′)copper(I) dicyanamide, [Cu(C14H12N2)2](C2N3) or [Cu(dmp)2][N(CN)2], (II), are reported. The Cu—N bond lengths and the distortion from idealized tetrahedral geometry of the dmp ligands are discussed and compared with related compounds. The bpmh molecule in (I) is π–π stacked with a dmp ligand at a distance of 3.4 Å, rather than coordinated to the metal atom. The molecule lies across an inversion center in the crystal. In (II), the normally coordinated dicyanamide molecule is present as an uncoordinated counter‐ion. 相似文献
15.
Liang Shen Hua‐Tong Wang Yi‐Jian Zhang Zhi‐Min Jin 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(4):m180-m182
The bimetallic title complex, [CuFe(CN)5(C12H30N6O2)(NO)] or [Cu(L)Fe(CN)5(NO)] [where L is 1,8‐bis(2‐hydroxyethyl)‐1,3,6,8,10,13‐hexaazacyclotetradecane], has a one‐dimensional zigzag polymeric –Cu(L)–NC–Fe(NO)(CN)3–CN–Cu(L)– chain, in which the CuII and FeII centres are linked by two CN groups. In the complex, the CuII ion is coordinated by four N atoms from the L ligand [Cu—N(L) = 1.999 (2)–2.016 (2) Å] and two cyanide N atoms [Cu—N = 2.383 (2) and 2.902 (3) Å], and has an elongated octahedral geometry. The FeII centre is in a distorted octahedral environment, with Fe—N(nitroso) = 1.656 (2) Å and Fe—C(CN) = 1.938 (3)–1.948 (3) Å. The one‐dimensional zigzag chains are linked to form a three‐dimensional network via N—H⋯N and O—H⋯N hydrogen bonds. 相似文献
16.
E. Yang Jian Zhang Yi‐Hang Wen Yu‐Biao Chen Yao Kang Zhao‐Ji Li Yuan‐Gen Yao 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(6):m280-m282
The hydrothermal reaction of an aqueous solution of Cu(CH3COO)2·H2O, 1,2,4,5‐benzenetetracarboxylic acid and 4,4′‐bipyridine gave rise to the interesting title three‐dimensional polymer {[Cu6(btec)3(4,4′‐bpy)3(H2O)2]·2H2O}n (btec is 1,2,4,5‐benzenetetracarboxylate, C10H2O84−, and 4,4′‐bpy is 4,4′‐bipyridine, C10H8N2), in which each btec ligand links six copper(II) cations into a lamellar [Cu6(btec)3(H2O)2]n subpolymer framework. There are two distinct diamine units and two distinct carboxylate units, with one of each lying across an inversion centre. 相似文献
17.
The title complex, [Ag4(C7H5O3)2(C8H6N2)4(C7H6O3)4], lies about an inversion centre and has a unique tetranuclear structure consisting of four AgI atoms bridged by four N atoms from two 1,8‐naphthyridine (napy) ligands to form an N:N′‐bridge and four O atoms from two salicylate (SA) ligands to form an O:O′‐bridge. The Ag atoms have distorted octahedral coordination geometry. The centrosymmetric Ag4 ring has Ag—Ag separations of 2.772 (2) and 3.127 (2) Å, and Ag—Ag—Ag angles of 107.70 (4) and 72.30 (4)°. All SA hydroxy groups take part in intramolecular O—H⋯O hydrogen bonding. In the crystal packing, the napy rings are oriented parallel and overlap one another. These π–π interactions, together with weak intermolecular C—H⋯O contacts, stabilize the crystal structure. 相似文献
18.
Brian J. Grimmond Joyce Y. Corey Nigam P. Rath 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(1):53-55
The first title metallocene, 1,3‐bis(dichlorotitanocene)‐1,1,3,3‐tetramethyldisiloxane dichloromethane solvate, [(η5‐C5H5)TiCl2(η5‐C5H4SiMe2)]2O·CH2Cl2, (I), crystallizes in space group P21/c. Compound (I) represents the first crystal structure of a bimetallic siloxy‐bridged titanocene. The geometric parameters of (I) are similar to those of the parent titanocene; however, the disiloxane substituents adopt an unexpected eclipsed conformation. The second title metallocene, 1,3‐bis[(pentamethylcyclopentadienyl)(cyclopentadienyl)titanium dichloride]‐1,1,3,3‐tetramethyldisiloxane, [(η5‐C5‐Me5)TiCl2(η5‐C5H4SiMe2)]2O, (II), represents the second crystal structure of a bimetallic siloxy‐bridged titanocene and crystallizes in the space group P21/n. Compound (I) possesses non‐crystallographic twofold molecular symmetry and both metal centers adopt pseudo‐tetrahedral geometries. The geometric parameters of (II) are similar to those of the mixed titanocene Cp*CpTiCl2 (Cp* = C5Me5) and the disiloxane substituents adopt a staggered conformation. 相似文献
19.
Rodney P. Feazell Cody E. Carson Kevin K. Klausmeyer 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(11):m598-m600
The novel title silver(I) coordination polymer, catena‐poly[[acetonitrilesilver(I)]‐di‐μ‐4‐[N‐(diphenylphosphino)aminomethyl]pyridine‐κ2N1:P;κ2P:N1‐[acetonitrilesilver(I)]‐μ3‐4‐[N,N‐bis(diphenylphosphino)aminomethyl]pyridine‐κ3N1:P:P′‐bis[acetonitrilesilver(I)(Ag—Ag)]‐μ3‐4‐[N,N‐bis(diphenylphosphino)aminomethyl]pyridine‐κ3P:P′:N1] tetrakis(tetrafluoroborate) acetonitrile trisolvate], {[Ag4(C2H3N)4(C18H17N2P)2(C30H26N2P2)2](BF4)4·3C2H3N}n, is formed by the self‐assembly of the Ph2P(4‐NHCH2C5H4N) and (Ph2P)2(4‐NCH2C5H4N) ligands with silver tetrafluoroborate. The polymer consists of alternating rings (which lie about inversion centers) bridged by the pyridyl rings of the bis‐phosphine‐substituted ligands, with anions hydrogen bonded the length of the chain. Two distinctly different metal coordination environments exist in the polymer, viz. distorted tetrahedral and trigonal geometries. 相似文献
20.
Thierry Le Borgne Pierre Thury Michel Ephritikhine 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(1):m8-m9
The ligand 1,2,3,4‐tetramethyl‐5‐(2‐pyridyl)cyclopentadiene (cp*py) forms a dinuclear complex with UIV, i.e. di‐μ‐oxo‐bis{chloro(diethyl ether‐κO)[(η5,κN)‐1,2,3,4‐tetramethyl‐5‐(2‐pyridyl)cyclopentadienyl]uranium(IV)}, [U2Cl2O2(C14H16N)2(C4H10O)2], in which cp*py acts as a chelating ligand, being bound to the metal atom by the cyclopentadienyl unit and also by the N atom of the pyridyl ring. 相似文献