共查询到20条相似文献,搜索用时 11 毫秒
1.
Glen B. Deacon Pauline Pearson Brian W. Skelton Leone Spiccia Allan H. White 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(12):m537-m539
The syntheses and crystal structure determinations of a pair of `sawhorse' dimers are reported, viz. [Ru2(C6H5CO2)2(C5H5N)2(CO)4] [a new polymorph, cf. Kepert, Deacon, Spiccia, Fallon, Skelton & White (2000). J. Chem. Soc. Dalton Trans. pp. 2867–2874] and [Ru2(CF3CO2)2(C5H5N)2(CO)4]. The Ru⋯Ru distances are 2.6724 (2) and 2.7122 (5) Å, respectively. 相似文献
2.
Chadwick D. Sofield Marc D. Walter Richard A. Andersen 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(9):m465-m466
The title compound, [Ti(C11H21Si2)2(NH2)], crystallizes as a bent metallocene, with the NH2 group oriented to maximize the π interaction between the N atom and the TiIII center. The increased π bonding is reflected in a short Ti—N bond length of 1.933 (3) Å. 相似文献
3.
Alexander V. Virovets Sergey N. Konchenko 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(9):e383-e384
The structure of the title compound, hexacarbonyl‐1κ3C,2κ3C‐[3(η5)‐cyclopentadienyl]bis(μ3‐selenido)diiron(II)cobalt(II),[CoFe2(μ3‐Se)2(C5H5)(CO)6], was redetermined at room temperature and the correct C2/c space group was assumed instead of the previously reported P space group [Mathur et al. (1995). Organometallics, 14 , 2115–2118]. Analysis of the literature data showed that the previously reported triclinic parameters correspond to a primitive subcell of the actual monoclinic C‐centred cell with cell dimensions close to those found by us. The title compound appeared to be isostructural with the sulfur–selenium analogue. 相似文献
4.
Bahija Abouhamza Mustapha Ait Ali Smaïl Allaoud Olivier Blacque Bernard Frange Abdallah Karim 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(7):796-798
The structures of two atropisomers of the title compound, [Cr(C16H18B2Cl2N2)(CO)3], are reported. For both compounds, the Cr(CO)3 moiety is bound to the C6 aromatic ring of the molecule; the existence of atropisomers resulting from the non‐equivalence of both faces of the C6 aromatic ring is a consequence of the 3‐chloro‐2‐methylphenyl ring being nearly perpendicular to the mean plane of the 2,4‐dibora‐1,3‐diazanaphthalene ring. The orientation of the Cr(CO)3 tripod relative to the C6 aromatic ring is such that it is nearly eclipsed in one isomer (2.4° rotation from being eclipsed with C—N, C—Cl and C—H) and slightly twisted (16.2°) from an eclipsed conformation in the other. 相似文献
5.
Scott A. Larkin Jeanette A. Krause Bauer V. E. Konoplev Victor P. Dyadchenko Dmitrii A. Lemenovskii Mitchell R. M. Bruce Alice E. Bruce 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(9):m440-m442
The reaction of ClAuPPh3 and 1,1′‐biphenyl‐2,2′‐dithiol in the presence of trimethylbenzylammonium chloride and K2CO3 in a tetrahydrofuran/methanol solution gives the title complex, [Au2(C12H8S2)(C18H15P)2]. The molecule contains P—Au—S units which `cross' with torsion angles of ∼90° [P—Au—Au—P = 86.23 (5)° and S—Au—Au—S = 95.62 (5)°]. The intra‐ and intermolecular Au⋯Au distances [3.9064 (3) and 6.3797 (5) Å, respectively] are outside the range for typical Au⋯Au interactions. However, the Au atoms appear to be drawn together, leading to a significant bending of the P—Au—S angles [170.24 (5) and 169.52 (5)°]. 相似文献
6.
Stefanus Otto 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(7):793-795
The crystal structure of the title compound, [PtCl(CH3)(C18H33P)2], is isostructural with various platinum(II) and palladium(II) complexes containing two bulky tricyclohexylphosphine ligands in a trans orientation. The Pt atom resides on an inversion centre, resulting in a 50% statistical disorder in the chloro and methyl positions. The most significant geometrical parameters are Pt—P 2.3431 (8), Pt—Cl 2.440 (4) and Pt—C1 2.179 (13) Å, and P—Pt—P 180, P—Pt—Cl 89.15 (12) and 90.85 (12), and C—Pt—Cl 172.7 (5)°. The effective and Tolman cone angles for the tricyclohexylphosphine ligands were calculated as 160 and 162°, respectively. 相似文献
7.
Nicholas C. Norman A. Guy Orpen Michael J. Quayle George R. Whittell 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(3):m160-m161
Crystals of the title compound, [NiCl(C18H15P)2], contain one molecule per asymmetric unit with no short intermolecular interactions. This is noteworthy since previous studies have reported that the formally 15‐electron species oligomerizes in the solid state. The nickel(I) centre has a distorted trigonal–planar coordination geometry, the origin of which is suggested to be electronic in nature. 相似文献
8.
Wen‐Jie Lu Yi‐Min Zhu Kai‐Long Zhong 《Acta Crystallographica. Section C, Structural Chemistry》2007,63(1):m4-m6
The title compound, [Mn3Fe6(C5H5)6(C6H4O2)6(C10H8N2)(H2O)2]n, consists of two crystallographically unique MnII centers. One is situated on an inversion center and is octahedrally coordinated by two N atoms from two bridging 4,4′‐bipyridine (4,4′‐bipy) ligands and four O atoms, two from different bridging ferrocenecarboxylate (μ2‐FcCOO−; Fc is ferrocene) units and two from aqua ligands. The two halves of each 4,4′‐bipy ligand are related by a center of symmetry. The second MnII center is in a strongly distorted tetragonal–pyramidal geometry, coordinated by five O atoms, three from three μ2‐FcCOO− units and two from a fourth, chelating, η2‐FcCOO− unit. The FcCOO− units function as bridging ligands to adjacent MnII centers, leading to the formation of linear ⋯Mn1Mn2Mn2Mn1⋯ chains. Adjacent chains are further bridged by 4,4′‐bipy ligands, resulting in a two‐dimensional layered polymer. 相似文献
9.
Lionel Salmon Pierre Thury Michel Ephritikhine Bernardo Masci 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(1):m27-m29
The title compound, [UO2(C33H38N2O2)2](CF3SO3)2·2C5H5N, has been obtained by reaction of UIV trifluoromethanesulfonate with p‐tert‐butyltetrahomodioxacalix[4]arene in pyridine. The uranyl ion lies on an inversion centre and is bound to two O atoms from each diphenoxide ligand, which gives the usual square‐planar equatorial environment. The zwitterionic diphenoxide species results from nucleophilic attack by pyridine on the benzylic ether C atoms of the homooxacalixarene, assisted by initial U coordination to the ether groups, with subsequent metal oxidation giving the uranyl moiety. 相似文献
10.
Alan K. Brisdon Ian R. Crossley Robin G. Pritchard John E. Warren 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(8):m322-m324
The title compound, [Cr(C6H5Cl)(CO)3], is the first group 6 tricarbonyl η6‐monohaloarene compound to be structurally characterized. It adopts a classic piano‐stool structure, with the Cr(CO)3 tripod assuming a syn‐eclipsed conformation relative to the arene ring (ϕ = 2.0°). The extended structure is dominated by intermolecular π⃛H interactions (H⃛ring centroid = 2.94 Å) and non‐classical hydrogen bonds between carbonyl and arene moieties (O⃛H = 2.50–2.58 Å). 相似文献
11.
Zhong‐Lu You Hai‐Liang Zhu 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(10):m517-m519
The title compound, [Ag2(C2F3O2)2(C5H6N2)2], is a dinuclear AgI complex with inversion symmetry. Each Ag atom is three‐coordinated by two N atoms from two different 2‐aminopyridine ligands and by one O atom from a trifluoroacetate anion, giving an approximately trigonal coordination environment. In the crystal packing, molecules are connected by N—H⋯O and N—H⋯F hydrogen bonds, forming layers parallel to the (001) plane. 相似文献
12.
Christophe M. L. Vande Velde Herman J. Geise Frank Blockhuys 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(1):o21-o24
In the title compound, C30H34O8, molecular symmetry is coincident with crystallographic inversion symmetry. A three‐dimensional network is generated containing both C—H·π and C—H·n(O) interactions. A comparison of the geometry of this molecule and the structure of a number of 2,4,6‐trimethoxy‐substituted analogues is provided. 相似文献
13.
C. Malla Reddy Ashwini Nangia Ram K. R. Jetti Roland Boese 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(5):o331-o333
The crystal structure of the title compound, alternatively called 1,2,3‐triiodo‐5‐(triphenylmethyl)benzene, C25H17I3, is analysed in terms of I⋯I and I⋯π interactions and the herring‐bone T motif between phenyl groups. There are two molecules in the asymmetric unit, denoted A and B. Inversion‐related A molecules are connected via an I⋯π interaction (3.641 Å, to a C—C bond mid‐point) to form an I⋯π dimer, and these dimers are connected through symmetry‐independent B molecules via I⋯I [3.5571 (15) Å] and I⋯π (3.561 Å, to a C—C bond mid‐point) interactions. 相似文献
14.
Ricardo Baggio Bruce Foxman Maria Teresa Garland Mireille Perec Wen Shang 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(11):e505-e506
The title compound, [Cu(O2CCH=CHCH3)2(C5H5N)2(H2O)], crystallizes as a monomer, with the copper ion in a pentacoordinated square‐pyramidal environment, bisected by a twofold axis passing through the metal atom and the apex. The molecules organise in chains connected by hydrogen bonds running along the unique b axis. 相似文献
15.
Anna M. M. Meij Stefanus Otto Andreas Roodt 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(9):m352-m354
The crystal structure of the title compound, trans‐[Pd(NCS)2(C6H13N3P)2](NCS)2, is one of the few palladium(II) complexes containing two protonated water‐soluble 1,3,5‐triaza‐7‐phosphaadamantane (PTA) ligands reported to date. The compound displays a distorted square‐planar geometry, with the Pd atom on an inversion centre and with the S atoms of the thiocyanate counter‐ions occupying the axial positions above and below the equatorial plane described by the phosphine and thiocyanate ligands. Geometric parameters for the formal coordination polyhedron include a Pd—P distance of 2.2940 (8) Å, a Pd—S distance of 2.3509 (8) Å and a P—Pd—S angle of 89.45 (3)°. The effective cone angle for the PTA ligands was calculated as 114.5°. 相似文献
16.
Jun‐Gill Kang Jung‐Pyo Hong Il‐Hwan Suh 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(2):231-232
In the crystal structure of the title compound, 4‐cyano‐N‐(4‐methoxybenzylidene)phenylamine N‐oxide, C15H12N2O2, the 4‐methoxyphenyl is approximately coplanar with the nitrone moiety but significantly rotated with respect to the 4‐cyanophenyl moiety. The extent of this rotation is significantly different for the two crystallographically independent molecules of the asymmetric unit [dihedral angles of 19.4 (1) and 26.5 (1)°]. The geometry about the C=N bond is Z. The two molecules are related to one another by a pseudo inversion centre. 相似文献
17.
Simon J. Coles Christopher W. Hall Michael B. Hursthouse 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(1):o29-o31
The two title calix[4]arene compounds, C34H32O8, (I), and C36H36O8·CH3Cl, (II), respectively, which differ only in the size of the alkyl function on the pendant ester group, are compared. Compound (I) forms a novel supramolecular array, whilst (II) fails to do so due to accommodating a chloroform guest molecule in the lower‐rim cavity. 相似文献
18.
M. Scott Goodman Margaret A. Goodman Andrey Y. Kovalevsky Alexander Y. Nazarenko Donald Pope 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(2):m30-m32
The title copper(II) complex, [Cu(C22H18N6)2](ClO4)2·2C2H3N, comprises two neutral substituted tris(pyrazol‐1‐yl)methane ligands bonded to a central CuII ion, which is positioned on a crystallographic inversion center. Six Cu—N bonds are arranged in a distorted octahedral fashion. The unsubstituted pyrazole rings on each ligand are oriented trans with respect to each other, interdigitated with the two 3‐phenylpyrazole rings of the other ligand. 相似文献
19.
Ming‐Liang Tong Xiao‐Ming Chen Seik Weng Ng 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(9):e374-e375
The Cu atom in the title complex {[Cu(C10H8N2)(C12H8N2)(ClO4)2]·H2O}n, has an N4O2 octahedral coordination geometry, the Cu atoms being bridged by the bipyridine and chelated by the phenanthroline heterocycles. Adjacent molecules are linked into a zigzag chain running along the c axis of the monoclinic unit cell. The chains are connected through lattice water molecules to produce a layer structure. 相似文献
20.
J. Wilson Quail John A. Weil Malvinder P. Singh 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(2):235-236
The title molecule (DMPH‐H), C8H9N5O6, was investigated to provide comparison with 2,2‐diphenyl‐1‐picrylhydrazine, which unlike DMPH‐H is readily oxidizable to form a well known stable free radical (DPPH). The structure shows essential differences in the configuration of the hydrazine‐N atoms, the ortho‐nitro group orientations and the crystal packing. The bond angles of the dimethylamino N atom [107.90 (13), 108.96 (12) and 112.21 (13)°] are consistent with a tetrahedral N atom and sp3 hybridization. 相似文献