共查询到20条相似文献,搜索用时 15 毫秒
1.
Lara C. Spencer Ilia A. Guzei Stephen O. Ojwach James Darkwa 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(9):m421-m423
The palladium(II) center in the title compound, trans‐[PdCl2(C5H2F6N2)2]·H2O, possesses a distorted square‐planar geometry. The NH groups are positioned on the same side of the PdN2Cl2 coordination plane. Four symmetry‐independent strong hydrogen bonds of three types (N—H⋯Cl, N—H⋯Cl and O—H⋯Cl) hold the structure together. 相似文献
2.
Sung‐Nak Choi Sang‐Yub Kim Hae‐Wook Ryu Yong‐Min Lee 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(12):m504-m506
In the title compound, [HgCl2(C15H26N2)], the chiral alkaloid (6R,7S,8S,14S)‐(−)‐l ‐sparteine acts as a bidentate ligand, with two Cl− ligands occupying the remaining coordination sites, producing a distorted tetrahedron. The N—Hg—N plane is twisted by 81.1 (2)° from the Cl—Hg—Cl plane. The mid‐point of the N⋯N line does not lie exactly on the Cl—Hg—Cl plane but is tilted towards one of the N atoms by 0.346 Å. Similarly, the mid‐point of the Cl⋯Cl line is tilted toward one of the Cl atoms by 0.163 Å. The packing structure shows that the complex is stabilized by two interatomic Cl⋯H contacts involving both Cl atoms and the methylene or methine H atoms of the (−)‐sparteine ligand. 相似文献
3.
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
4.
Henryk Krawczyk Katarzyna Wsek Jacek Kdzia Jakub Wojciechowski Wojciech M. Wolf 《Acta Crystallographica. Section C, Structural Chemistry》2008,64(1):o24-o26
The cyclopropane ring of the title compound, C17H16O2, shows a high level of substituent‐induced bond‐length asymmetry. The carboxyl group adopts a conformation that prompts electron‐density transfer from the ring towards the carbonyl π system. 相似文献
5.
Souheila Ladraa Abdelmalek Bouraiou Sofiane Bouacida Thierry Roisnel Ali Belfaitah 《Acta Crystallographica. Section C, Structural Chemistry》2009,65(9):o475-o478
In the structures of the two enantiopure diastereoisomers of the title compound, C20H18ClN3O, which crystallize in different space groups, the molecules are very similar as far as bond distances and angles are concerned, but more substantial differences are observed in some torsion angles. The crystal structures of both molecules can be described as zigzag layers along the c axis. The packing is stabilized by hydrogen‐bond interactions of N—H...O, C—H...Cl and C—H...π types for 2‐[(R)‐2‐chloro‐3‐quinolyl]‐2‐[(R)‐1‐(4‐methoxyphenyl)ethylamino]acetonitrile, and of N—H...N, C—H...O and C—H...π types for 2‐[(S)‐2‐chloro‐3‐quinolyl]‐2‐[(R)‐1‐(4‐methoxyphenyl)ethylamino]acetonitrile, resulting in the formation of two‐ and three‐dimensional networks. 相似文献
6.
Asymmetric synthesis of irnigaine was achieved starting from an enantiopure β-amino ester 5 using the condensation of amino al-cohol 2 with acetylacetone and the subsequent intramolecular cycllzation as the key steps. 相似文献
7.
Sung Kwon Kang Sung‐Nak Choi Yong‐Min Lee 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(4):m174-m176
In the title compound, [NiCl2(C15H26N2)], the chiral alkaloid (6R,7S,8S,14S)‐(−)‐l ‐sparteine acts as a bidentate ligand, with two chloride ligands occupying the remaining coordination sites, producing a slightly distorted tetrahedron. The N—Ni—N plane in the title complex is twisted by 81.31 (11)° from the Cl—Ni—Cl plane. Other distortions of the tetrahedron are discussed. 相似文献
8.
Ferdinand Krner Markus Schürmann Hans Preut Wolfgang Kreiser 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(1):74-75
Stereoselective hydroboration of (?)‐isopulegol and subsequent fractional crystallization furnishes the title compound, C10H20O2. The relative configuration of the stereogenic centres has been assigned by means of X‐ray diffraction analysis since the monoterpenediol is employed as a versatile chiral building block in stereospecific natural product synthesis. 相似文献
9.
Huub Kooijman Anthony L. Spek Henk Kleijn Hendrik L. van Maanen Johann T. B. H. Jastrzebski Gerard van Koten 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(4):481-483
The configuration of the chiral ring atoms of the title compound, C26H26N2O, obtained in an enantioselective synthesis, has been established relative to the known R configuration of the α‐methylbenzyl moieties. The crystal packing involves a two‐dimensional network of C—H?π interactions between the aromatic rings. 相似文献
10.
Matthew J. Hallam Colin A. Kilner Malcolm A. Halcrow 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(8):m445-m446
The title compound, [Cu2(C8H6N3)2(C2H3N)2](ClO4)2, contains a centrosymmetric dinuclear dication, with square‐pyramidal CuII centres linked by two 1,2‐pyrazolide bridging groups. There is a weak apical interaction between each Cu ion and a perchlorate O atom. 相似文献
11.
Silvia Russi Leopoldo Suescun Alvaro Mombrú Helena Pardo Raúl A. Mariezcurrena Gabriel Cavalli Gustavo Seoane 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(7):820-821
The title compound, [Fe(C8H11ClO2)(CO)3], has been synthesized, isolated and characterized by single‐crystal X‐ray diffraction. The molecule crystallizes in the orthorhombic space group P212121. The metal–ligand arrangement is typical of (1,3‐diene)tricarbonyliron complexes. 相似文献
12.
Yong‐Kyu Kim Bun‐Joo Kim Sung Kwon Kang Sung‐Nak Choi Yong‐Min Lee 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(2):m64-m66
In the title compound, [Cu(N3)2(C15H26N2)], the chiral alkaloid (−)‐l‐sparteine (Sp) acts as a bidentate ligand, with two azide ligands occupying the remaining coordination sites, forming a distorted CuN4 tetrahedron. The dihedral angle between the NSp—Cu—NSp and Nazide—Cu—Nazide planes is 55.3 (2)°. Principal dimensions include Cu—NSp = 2.011 (6) and 2.025 (5) Å, and Cu—Nazide = 1.939 (6) and 1.934 (7) Å. The mid‐point of the NSp⋯NSp line does not lie exactly in the Nazide—Cu—Nazide plane, but is tilted towards one of the NSp atoms by 0.026 Å. 相似文献
13.
Muharrem Diner Osman Dayan Bekir etinkaya Namk
zdemir 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(9):m398-m400
In the title compound, [CoCl2(C11H15N3O2)], the CoII ion is five‐coordinated in a strongly distorted square‐pyramidal arrangement, with one of the two Cl atoms located in the apical position, and the other Cl atom and the three N‐donor atoms of the tridentate methyloxime ligand located in the basal plane. The non‐H atoms, except for the Cl atoms, lie on a mirror plane. The two equatorial Co—Noxime distances are almost equal (mean 2.253 Å) and are substantially longer than the equatorial Co—Npyridine bond [2.0390 (19) Å]. The structure is stabilized by intra‐ and intermolecular C—H⋯Cl contacts, which involve one of the methyl C atoms belonging to the methyloxime groups. 相似文献
14.
Takashiro Akitsu Yasuaki Einaga 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(12):m640-m642
The title compounds, [Cu(C15H12Cl2NO)2], (I), and [Cu(C17H18NO2)2], (II), both adopt a compressed tetrahedral trans‐[CuN2O2] coordination geometry, the molecules having an umbrella conformation overall. These complexes differ from one another with respect to the 1‐phenylethylamine moieties, the direction of the benzene rings being either inside [in (I)] or inside and outside [in (II)] of the molecules. The crystals of (I) and (II) have Δ(R,R) and Λ(R,R) absolute configurations, respectively. 相似文献
15.
Yoshiyuki Kani Shigeru Ohba Seiji Amano Noriko Ogawa Masami Ohtsuka Noritaka Chida 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(5):e222-e222
The relative configuration was determined for the title compound, C26H34O6, which was prepared in a synthetic study on immunosuppressant FR65814. There is an intramolecular hydrogen bond between the hydroxy and epoxy groups. 相似文献
16.
Lisa Diab Jean‐Claude Daran Maryse Gouygou Eric Manoury Martine Urrutigoïty 《Acta Crystallographica. Section C, Structural Chemistry》2007,63(12):m586-m588
The reaction of enantiomerically pure planar chiral ferrocene phosphine thioether with bis(acetonitrile)dichloridopalladium yields the title square‐planar mononuclear palladium complex as an enantiomerically pure single diastereoisomer, [PdFe(C5H5)(C20H20PS)Cl2]. The planar chirality of the ligand is retained in the complex and fully controls the central chirality on the S atom. The absolute configuration, viz. S for the planar chirality and R for the S atom, is unequivocally determined by refinement of the Flack parameter. 相似文献
17.
Guang‐Fei Liu Lin‐Lin Li Yong Zhang Jian‐Ping Lang Seik Weng Ng 《Acta Crystallographica. Section C, Structural Chemistry》2007,63(1):m1-m3
The title compound, [Cu(ClO4)2(C4H9N3O2)2][Cu(C4H9N3O2)2(CH4O)2](ClO4)2·2CH3OH, comprises two independent CuII species lying on different inversion sites. In the Cu complexes, a distorted octahedral geometry arises (from basic square‐planar N4 coordination) from the weak coordination of two perchlorate ions (as Cu—O) in one species and two methanol molecules in the other (also as Cu—O). Interactions between the O atoms of the perchlorate anions or methanol groups and the imide or amine NH groups afford an extensive intermolecular hydrogen‐bonding network. 相似文献
18.
Mamiko Odoko Nobuo Okabe 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(4):m136-m139
In the title compounds, [PtCl2(C3H10N2)], (I), [PdCl2(C3H10N2)], (II), and [Pt2Cl4(C10H26N4)], (III), each metal atom lies in a distorted cis‐square coordination geometry. Compounds (I) and (II) are isostructural, and each complex has a mirror plane through the metal atom and the middle C atom of the propane‐1,3‐diamine ligand. In (III), the binuclear complex [Pt2Cl4(spn)] has an inversion center at the middle of the 4,9‐diazadodecane‐1,12‐diamine (spermine, spn) ligand. The six‐membered chelate rings in (III) adopt a chair form, which is unsymmetrical and less flattened than those in (I) and (II). In all three crystal structures, there are intermolecular N—H⋯Cl hydrogen bonds. 相似文献
19.
Liu Jun Li Jun Yang Shaorong Li Hua Hu Quanyuan Xu Hansheng Hu Xianming 《Journal of heterocyclic chemistry》2001,38(2):515-518
(2R,4S,5S)‐(+)‐5‐(2,2‐Dichloroacetamido)‐4‐(4‐nitrophenyl)‐2‐aryl‐1,3‐dioxanes 3–8 were synthesized with high diastereoselectivity and good yields. The structures of acetals were determined and the configurations were confirmed by 2D‐NMR (NOESY) and X‐ray crystallographic analysis. 相似文献
20.
Osman Dayan Muharrem Diner Bekir etinkaya Namk
zdemir 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(7):m315-m318
In the title compound, [CuCl2(C11H15N3O2)], the CuII ion is five‐coordinated in a strongly distorted trigonal–bipyramidal arrangement, with the two methyloxime N atoms located in the apical positions, and the pyridine N and the Cl atoms located in the basal plane. The two axial Cu—N distances are almost equal (mean 2.098 Å) and are substantially longer than the equatorial Cu—N bond [1.9757 (15) Å]. It is observed that the N(oxime)—M—N(pyridine) bond angle for five‐membered chelate rings of 2,6‐diacetylpyridine dioxime complexes is inversely related to the magnitude of the M—N(pyridine) bond. The structure is stabilized by intra‐ and intermolecular C—H⋯Cl hydrogen bonds which involve the methyl H atoms, except for one of the two acetylmethyl groups. 相似文献