共查询到20条相似文献,搜索用时 421 毫秒
1.
Ramn Macías Simon A. Barrett Jonathan Bould Udo Drfler Josef Holub John D. Kennedy Mark Thornton‐Pett Bohumil tíbr 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(5):520-522
Neutral 8‐(5‐iodo‐n‐pentyl)‐3‐(η5‐pentamethylcyclopentadienyl)‐arachno‐3‐rhoda‐7,8‐dithiaundecaborane, [Rh(C5H19B8IS2)(C10H15)], obtained from the [arachno‐7,8‐S2B9H10]? anion by treatment with I(CH2)5I followed by [Rh(C5Me5)Cl2]2 and N,N,N′,N′‐tetramethyl‐1,8‐diaminonaphthalene, has the 11‐vertex cluster geometry of [arachno‐7,8‐S2B9H10]?, but with an {Rh(C5Me5)} unit in the 3‐position instead of a {BH} unit, and with a –(CH2)5I chain attached exo to an S atom. 相似文献
2.
Hugh W. Thompson Roger A. Lalancette 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(1):o22-o23
The title keto acid, (+)‐23,24‐dinor‐3‐oxochol‐4‐en‐22‐oic acid, C22H32O3, forms carboxyl‐to‐ketone hydrogen‐bonding catemers [O?O = 2.699 (4) Å and O—H?O = 173°], linking molecules screw‐related in b. The four molecules in the cell form two parallel counter‐directional chains, screw‐related in a. Intermolecular C—H?O=C close contacts to different neighboring molecules were found for the ketone and the acid. 相似文献
3.
Caroline Price Udo Drfler John D. Kennedy Mark Thornton‐Pett 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(5):600-601
The title compound, 6‐pyridyl‐4‐aza‐arachno‐nonaborane(11), C5H16B8N2, has an arachno nine‐vertex {4‐NB8H11} cluster structure with a pyridine ligand in the exo‐6‐position. The cluster has close geometric similarities to the thiaborane and carbaborane analogues. 相似文献
4.
Surajit Banerjee Alok K. Mukherjee Bidisha Nandi Nitya G. Kundu Madeleine Helliwell 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(12):1490-1491
The title compound, C20H19NO2S2, is formed by a palladium–copper‐catalyzed reaction between 4‐methyl‐N‐[2‐(prop‐2‐ynylsulfanyl)phenyl]benzenesulfonamide and p‐iodotoluene. The molecules contain three essentially planar parts, namely an aminothiophenol moiety (A), a toluenesulfone moiety excluding the oxo ligands (B) and a tolyl group (C), approximately orthogonal to each other; the dihedral angles A/B, A/C and B/C are 111.6 (1), 89.3 (1) and 101.4 (1)°, respectively. Intermolecular N—H?O hydrogen bonds link the molecules into infinite one‐dimensional chains. 相似文献
5.
Muharrem Diner Namk
zdemir M. Emin Günay Bekir etinkaya Orhan Büyükgüngr 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(8):m373-m375
The title complex, [RhBr(C8H12)(C19H22N2O2)], has a distorted square‐planar geometry. There are two molecules, A and B, in the asymmetric unit. The Rh—C bond distance between the N‐heterocyclic ligand and the metal atom is 2.039 (2) Å in molecule A and 2.042 (2) Å in molecule B. The angle between the carbene heterocycle and the coordination plane is 87.56 (12)° in molecule A and 87.03 (11)° in molecule B. It is shown that the average Rh—C(COD) (COD is cyclooctadiene) distance is linearly dependent on the Rh—C(imidazolidine) distance in this type of compound. This can be ascribed to the steric hindrance produced by the packing. The crystal structure contains intramolecular C—H⋯O and intermolecular C—H⋯Br interactions. 相似文献
6.
eljko K. Jaimovi Zoran D. Tomi Gerald Giester Vukadin M. Leovac 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(10):m381-m383
In the crystal structure of the title complex, [Co(C6H8N3S)3], the CoIII atom is octahedrally coordinated by three monodeprotonated bidentate 3,5‐dimethyl‐1H‐pyrazole‐1‐thiocarboxamide ligands with two thiocarboxamide N atoms in axial positions. The asymmetric unit contains two molecules (A and B) and these molecules are arranged in chains in an alternating fashion connected by N—H⋯S interactions. 相似文献
7.
Olga Crespo M. Concepcin Gimeno Peter G. Jones Antonio Laguna 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(1):46-47
The title compound, 7‐[(Ph2P)Au(PPh3)]‐8‐(CH3)‐7,8‐nido‐C2B9H10]·0.5CH2Cl2 or [Au(C15H23B9P)(C18H15P)]·0.5CH2Cl2, is the first reported gold derivative of the ligand [7‐(Ph2P)‐8‐(CH3)‐7,8‐nido‐C2B9H10]?. It has a mononuclear structure with the gold centre in an essentially linear coordination [P—Au—P 174.041 (15)°]. The open C2B3 face contains one H atom that is strongly bonded to the central B atom and semi‐bridging to a neighbouring B atom [B—H distances 1.070 (16) and 1.45 (3) Å]. 相似文献
8.
Jonathan Bould Raikko Kiveks Reijo Sillanp Francesc Teixidor Clara Vias 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(5):o271-o273
Tetraethylammonium 7‐dimethylsulfanyl‐nido‐dodecahydroundecaborate, [Et4N][7‐Me2S‐nido‐B11H12] or C8H20N+·C2H18B11S−, is a product of the deprotonation of [7‐Me2S‐nido‐B11H13] with KHBEt3 and precipitation with tetraethylammonium chloride. The effect of removing one endo‐terminal H atom is to cause a general contraction of the open‐face B—B distances. 相似文献
9.
Michael G. S. Londesborough Jonathan Bould Josef Holub John D. Kennedy Mark Thornton‐Pett Bohumil tíbr 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(12):1423-1424
The title compound, 1,1,2,2‐tetracarbonyl‐1,2‐μ‐carbonyl‐4,11‐dimethylsulfido‐closo‐1,2‐dicobaltadodecaborane, [Co2(C4H20B10S2)(CO)5], has a closo 12‐vertex {1,2‐Co2B10H8} structure with SMe2 ligands at the exo‐4‐ and 11‐positions. The cluster displays close structural similarities to the SEt2 analogue. 相似文献
10.
Michael J. Bayer Hans Pritzkow Walter Siebert 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(5):o257-o258
In the title compound, 1,1,6a,7,9a,10‐hexachloro‐2,3,5,6,8,9,11,12‐octa‐p‐tolyl‐1,6a,9a,12a‐tetraborata‐3a,4a,7,10‐tetrabora‐4a1,6b,9b,12b‐tetraoxonia‐4‐oxatetracyclopenta[1,2‐a:2,1,5‐de:1,2‐g:1,2‐i]naphthalene dichloromethane pentasolvate, C64H56B8Cl6O5·5CH2Cl2, two condensed oxadiborole rings are attached to two further oxadiborole rings in a type of donor–acceptor bonding, thus forming a ten‐membered alternating (B—O)5 naphthalene‐like arrangement as the central building block. 相似文献
11.
Fbio A. Kunrath Osvaldo L. Casagrande Loïc Toupet Jean‐Franois Carpentier 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(8):o521-o523
The six‐membered B2H4 ring of the title compound, C36H30B2N8, adopts a slightly distorted boat conformation, with the terminal B substituents in a trans orientation. One 3‐phenylpyrazolyl group is in an equatorial position, whereas the second is in an axial position with respect to the plane defined by the B atoms. 相似文献
12.
Ulaganathan Venkatasubramanian David Ellis Georgina M. Rosair Alan J. Welch 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(10):o559-o561
The title compound, 1,2‐(COOH)2‐1,2‐closo‐C2B10H10·0.5C2H6O or C4H12B10O4·0.5C2H6O, forms a tetramer by incorporating ethanol (solvent) molecules through hydrogen bonding. Two eight‐membered rings [graph set R(8)] are formed by hydrogen bonding between two carboxylic acid groups, whereas two ten‐membered rings [R(10)] are formed by hydrogen bonding between two carboxylic acid groups and the OH group of an ethanol molecule (solvent). Two crystallographically independent tetramers are present in the crystal structure. 相似文献
13.
Andrei S. Batsanov Judith A. K. Howard David O'Hagan Mustafa Tavasli 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(11):e512-e513
The title compound [alternative name: 8‐methyl‐8‐azabicyclo[3.2.1]octan‐3‐ylmethyl p‐toluenesulfonate(N8—B)–borane], C16H26BNO3S, has the tosyloxymethyl substituent in an endo position. The BH3 group is equatorial and the (N‐bonded) methyl group is axial, relative to the six‐membered heterocycle. The N—B bond of 1.649 (8) Å is one of the longest known. 相似文献
14.
Yong Nie Chun‐Hua Hu Xue Li Wei Yong Jian‐Min Dou Jie Sun Ruo‐Shui Jin Pei‐Ju Zheng 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(8):897-899
Each of the title compounds, 8‐methoxy‐7,7‐bis(triphenylphosphine‐P)‐8,9:10,11‐di‐μH‐7‐platina‐nido‐undecaborane dichloromethane hemisolvate, [Pt(CH14B10O)(C18H15P)2]·0.5CH2Cl2, (I), 8‐isopropoxy‐7,7‐bis(triphenylphosphine‐P)‐8,9:10,11‐di‐μH‐7‐platina‐nido‐undecaborane dichloromethane solvate, [Pt(C3H18B10O)(C18H15P)2]·CH2Cl2, (II), and 9‐isopropoxy‐7,7‐bis(triphenylphosphine‐P)‐8,9:10,11‐di‐μH‐7‐platina‐nido‐undecaborane dichloromethane solvate, [Pt(C3H18B10O)(C18H15P)2]·CH2Cl2, (III), has an 11‐vertex nido polyhedral skeleton, with the 7‐platinum centre ligating to two exo‐polyhedral PPh3 groups and an alkoxy‐substituted polyhedral borane ligand. Compounds (II) and (III) are isomers. The Pt—B distances are in the range 2.214 (7)–2.303 (7) Å for (I), 2.178 (16)–2.326 (16) Å for (II) and 2.205 (6)–2.327 (6) Å for (III). 相似文献
15.
R. Hema V. Parthasarathi S. Thamotharan S. Dubey D. P. Jindal 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(4):o213-o215
In the title compound, 4‐(3β‐hydroxy‐17‐oxoandrost‐5‐en‐16‐ylidenemethyl)benzonitrile, C27H31NO2, rings A and C of the steroid nucleus are in chair conformations. The central six‐membered ring B is in an 8β,9α‐half‐chair conformation, while the five‐membered ring D adopts a 13β,14α‐half‐chair conformation. The cyanobenzylidene moiety has an E configuration with respect to the carbonyl group at position C17. The dihedral angle between the planes of the steroid nucleus and the cyanobenzylidene moiety is 22.61 (15)°. Intermolecular O—H⃛N hydrogen bonds formed between the hydroxyl group of the steroid and the N atom of the cyanobenzylidene moiety of symmetry‐related molecules link the steroid molecules into chains which run parallel to the b axis. 相似文献
16.
M. Yogavel D. Velmurugan W. G. Rajeswaran P. C. Srinivasan H.‐K. Fun 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(12):o715-o717
The title compound, C15H19NO5, crystallizes in the monoclinic space group P21/c with four molecules in the asymmetric unit, which differ from each other in the orientation of their methoxy groups. Of the three methoxy groups in each molecule, one lies close to the plane of the molecule and the other two have an out‐of‐plane conformation where they point in opposite directions. In the crystal structure, four different types of π‐stacks are observed and the molecules pack in two different types of stacking sheets, with alternating molecules A and B in one ribbon and alternating molecules C and D in the other. The supramolecular structure is supported by C—H⋯O and π–π interactions. 相似文献
17.
Valery Belakhov Mark Botoshansky Timor Baasov 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(8):m450-m452
The hexopyranosyl ring of the title compound, [Hg(CH3)(C9H15O7S)], adopts the 4C1 chair conformation, and the anomeric configuration of the thiomethylmercury linkage is β. The compound exists as two symmetry‐independent conformers, A and B, within the unit cell, and each shows an almost linear S—Hg—C arrangement. Most of the bond distances and angles in A and B are similar, although a marked difference exists in the side‐chain conformation. Weak secondary intramolecular (between Hg and ring O) and intermolecular (between A and B conformers) interactions are documented. 相似文献
18.
Pierre Morel Paul Schaffer James F. Britten John F. Valliant 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(12):m601-m604
The title compounds, bis[1,2‐dicarba‐closo‐dodecaboran(12)‐1‐yl]mercury(II) dichloromethane solvate, [Hg(C2B10H11)2]·CH2Cl2, (I), and bis[1,12‐dicarba‐closo‐dodecaboran(12)‐1‐yl]mercury(II) tetrahydrofuran solvate, [Hg(C2B10H11)2]·C4H8O, (II), were prepared in excellent yields using a robust synthetic procedure involving the reaction of HgCl2 with the appropriate monolithiocarborane. X‐Ray analysis of the products revealed strong interactions between the Hg atoms in both complexes and the respective lattice solvent. The distances between the HgII centers and the Cl atoms of the dichloromethane solvent molecule in the ortho‐carborane derivative, (I), and the O atom of the tetrahydrofuran molecule in the para‐carborane complex, (II), are shorter than the sums of the van der Waals radii for Hg and Cl (3.53 Å), and Hg and O (3.13 Å), respectively, indicating moderately strong interactions. There are two crystallographically independent molecules in the asymmetric unit of both compounds, which, in each case, are related by differing relative positions of the cages. 相似文献
19.
Zhibin Zhang Eric Burkholder Jon Zubieta 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(6):o452-o454
N,N′‐Bis(3‐methylphenyl)‐N,N′‐diphenyl‐1,1′‐biphenyl‐4,4′‐diamine (TPD), C38H32N2, crystallizes in the monoclinic space group P21 with a pseudo‐orthogonal lattice, rather than the previously reported orthorhombic space group P212121 [Kennedy, Smith, Tackley, David, Shankland, Brown & Teat (2002). J. Mater. Chem. 12 , 168–172]. The asymmetric unit consists of two independent molecules, A and B, which are arranged along the [100] direction to form vertical layers of alternately stacked A and B molecules. Molecule A shows a great deal of rotational movement in the four terminal aryl rings, resulting in two disordered tolyl groups split over two sites, while molecule B exhibits an almost cis configuration of the two terminal tolyl groups with respect to these ring planes. 相似文献
20.
Reijo Sillanp Jordi Llop Clara Vias Francecs Teixidor Raikko Kiveks 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(8):900-901
In the title compound, (η5‐2,5‐dimethylpyrrolyl)[(7,8,9,10,11‐η)‐7‐methyl‐7,8‐dicarba‐nido‐undecaborato]cobalt(III), [3‐Co{η5‐[2,5‐(CH3)2‐NC4H2]}‐1‐CH3‐1,2‐C2B9H10] or [Co(C3H13B9)(C6H8N)], the CoIII atom is sandwiched between the pentagonal faces of the pyrrolyl and dicarbollide ligands, resulting in a neutral molecule. The C—C distance in the dicarbollide cage is 1.649 (3) Å. 相似文献