共查询到20条相似文献,搜索用时 31 毫秒
1.
René de Gelder Jan M. M. Smits Frank J. A. D. Bakkeren Antonius J. H. Klunder 《Journal of chemical crystallography》1997,27(11):677-679
The crystal and molecular structure of (±)-5-benzylamino-endo-tricyclo[5.2.1.02.6]dec-4-en-3-one is described. The X-ray analysis revealed that the reduction of the norbornene double bond is an important process in the irradiation of the used enaminones. The structure was solved by direct methods and refined by least squares methods toR 1=0.0468 for 2070 reflections (withI>2σ(I). Crystal data: C17H19NO, Orthorhombic, space groupPbcn, a=40.695 (1),b=6.6928 (1),c=10.2378(4)Å,V=2788.44(14)Å3,Z=8. 相似文献
2.
Esref Günay Ilpo Mutikainen Urho Turpeinen Gerard A. van Albada Jaap G. Haasnoot Jan Reedijk 《Journal of chemical crystallography》2010,40(11):1006-1010
Abstract
Two newly synthesized coordination compounds copper(II) bromide with the ligand 7-isobutyl-5-methyl[1,2,4]triazolo[1,5-a]pyrimidine (abbreviated as ibmtp) are presented, together with their 3D crystal structure and spectroscopic and magnetic properties. The compounds are CuBr2(ibmtp)2 (1) (red crystals) and [CuBr(ibmtp)4]Br(H2O)3 (2) (blue crystals). In (1) the Cu(ii) ion is present in a distorted tetrahedral environment, while in (2) the Cu(ii) ion has a square pyramidal geometry. These crystal structures are also the first ones reported with the ligand ibmtp. 相似文献3.
Ond?ej Kaman ?ubomír Smr?ok Ivana Císa?ová David Havlí?ek 《Journal of chemical crystallography》2011,41(10):1539-1546
Abstract
The crystal structures of the title compounds consist of 1,4-dimethyl-1,4-diazabicyclo[2.2.2]octane-1,4-diium cation [C8H18N2]2+ and [H2PO4]− or [HSO4]− anions. Both crystal structures are monoclinic, the structure of the dihydrogen phosphate (I) is non-centrosymmetric (P21) with a = 6.4090(2) ?, b = 13.6920(5) ?, c = 7.6140(3) ?, β = 94.620(2)°, V = 665.97(4) ?3, Z = 2; whereas the unit cell of the hydrogen sulphate (II) is centrosymmetric (P21/c) with a = 13.8460(2) ?, b = 12.6610(2) ?, c = 8.0360(2) ?, β = 99.5800(12)°, V = 1389.10(5) ?3, Z = 4. Both the structures are formed by the different bonding patterns of the anions interlinked by strong and moderate O–H···O hydrogen bonds. While the structure of (I) consists of a two-dimensional network of the hydrogen bonded dihydrogen phosphates, the infinite chains of the hydrogen bonded hydrogen sulphates are the basic building unit of the structure (II). In addition to the dominant electrostatic interaction the divalent cations stabilize themselves in the structures by forming several C–H···O hydrogen bonds to the oxygen atoms of the anions. The IR spectra of both the compounds are strongly affected by the hydrogen bonds whose influence on OH stretching vibrations is analysed by means of the DFT calculations in the solid state. 相似文献4.
The crystal and molecular structure of 3-phenyl-7-bromoisoxazolo[4,5-d]-pyridazin-4(5H-one, C11H6BrN3O2, has been determined from two- and three-dimensional X-ray data and refined by Fourier and least-squares methods toR = 0·101 for 1187 observed reflexions. Crystals of 3-phenyl-7-bromoisoxazolo-[4, 5-d]pyridazin-4(5H)-one are monoclinic:a = 7·67,b = 6·84,c = 20·52 Å, = 91·5 °,Z = 4, space groupP21/c. The benzene ring makes an angle of 4·5 ° with the plane of the isoxazole ring, and the other part of the molecule is slightly non-planar. The bond distances and angles compare well with those of other similar molecules. Two N-H...O hydrogen bonds join the two molecules related by a centre of symmetry. Close molecular packing is found in layers parallel to (100). 相似文献
5.
The title compound 1-phenyl-3-methylthio-4-imino-5-allyl-pyrazolo[3,4-d]pyrimidine, C15H15N5S, has been synthesized and characterized by x-ray diffraction: orthorhombic, space group Pbca, with a = 17.3480(9), b = 8.5022(5), c = 19.8132(11) Å. Z = 8, V = 2922.4(3) Å3. The compound shows a fully delocalized pyrazolo[3,4-d]pyrimidine system with a sp2 hybridization of the N(4) atom. 相似文献
6.
Xin-hua Lu Jing-jing Liang Jing Zhao Yong Zhang Ding-xian Jia 《Journal of chemical crystallography》2011,41(4):557-562
Abstract
Two neodymium thiostannates [Nd(dien)3]2[(Sn2S6)Cl2] (1) and [Nd(dien)3]2[(Sn2S6)(SH)2] (2) (dien = diethylenetriamine) were synthesized by the reaction of tin and sulfur in the presence of NdCl3 and Nd2O3, respectively under solvothermal conditions. Compounds 1 and 2 crystallize in monoclinic space group P21/n. Crystallographic data for 1: a = 11.6722(16), b = 15.119(2), c = 14.1566(19) ?, β = 96.213(3)°, V = 2483.6(6) ?3, Z = 4. For 2: a = 11.7190(14), b = 15.2168(19), c = 14.2209(18) ?, β = 95.775(4)°, V = 2523.1(5) ?3, Z = 4. The nine-coordinate [Nd(trien)3]3+ complex cation formed in situ acts as the counter ion to the [Sn2S6]4− anion. The [Nd(dien)3]3+, [Sn2S6]4− and Cl– (or SH–) ions form a 3-dimensional network structure through the N–H···S and N–H···Cl hydrogen bonds. 相似文献7.
Chun-Yip Leung Thomas C. W. Mak Henry N. C. Wong 《Journal of chemical crystallography》1996,26(3):227-230
A benzo-phenanthro-fused planar cyclooctatetraene derivative, namely, 5,6,15,16-tetradehydrobenzo[a]phenanthro[9, 10-e]cyclooctene (5) was synthesized in two steps from the known benzo[a]phenanthro[9, 10-e]cyclooctene (6). Compound5 crystallizes in space groupPbam witha=9.828(2),b=19.466(4),c=15.901(3) Å, and Z=8. X-Ray analysis (MoK radiation,R=0.060 for 1233 observed data) has shown that both independent molecules have the same planarC
2v
configuration with averaged bond lengths of 1.381(7) and 1.208(7) Å for the phenanthrene C6a–C14b bond and the acetylenic CC bond, respectively.1H and13C NMR spectral results of 5 and 5,6,15,16-tetrabromo-5,6,15,16-tetrahydrobenzo[a]phenanthro[9, 10-e]cyclooctene (7) are also presented. 相似文献
8.
Jing Zhao Wei-wei Tang Jing-jing Liang Yong Zhang Ding-xian Jia 《Journal of chemical crystallography》2012,42(3):187-191
Abstract
Mix-coordinated praseodymium(III) complexes concerning the [SbSe4]3− inorganic ligand, [Pr(en)2(dien)(η 2-SbSe4)] (1) and [Pr(en)(trien)(μ-η 1,η 2-SbSe4)] n (2) (en = ethylenediamine, dien = diethylenetriamine, trien = triethylenetetramine), were prepared by solvothermal reactions of Pr2O3, Sb and Se in en + dien and en + trien mixed solvents, respectively. They crystallize in the monoclinic space group P21/n but with different molecular structures. Crystallographic data for 1: a = 8.610(2), b = 27.722(7), c = 9.294(2) ?, β = 108.987(3)°, V = 2097.7(9) ?3, Z = 4. For 2: a = 14.2987(17), b = 9.0176(9), c = 15.4357(18) ?, β = 100.708(3)°, V = 1955.6(4) ?3, Z = 4. The [SbSe4]3− anion coordinates to the Pr3+ ion in [Pr(en)2(dien)]3+ as a η 2-SbSe4 chelating ligand, yielding complex 1. It acts as a μ-η 1,η 2-SbSe4 bridging ligand to connect the [Pr(en)(trien)]3+ ions into the polymer 2. The coordination difference between 1 and 2 is attributed to the coligands of mixed polyamines. 相似文献9.
Sanjay Dutta Sergey M. Dibrov Bao T. Ho Cody J. Higginson Thomas Hermann 《Journal of chemical crystallography》2012,42(2):119-129
Abstract
The compound 5, containing the novel heterocycle 2-oxa-4,7-diazabicyclo[3.3.1]non-3-ene, has been obtained in a synthetic approach toward oxazoles and 1,3-diazepanes of natural product-like complexity from cyclization and rearrangement of δ-lactam cyanamides. When this procedure was applied to a silyl-protected N-((3S,4S,5S)-4,5-dihydroxy-2-oxopiperidin-3-yl)cyanamide (2b) formation of the novel heterobicyclic scaffold 5 was observed along with the expected oxazole (3b) and diazepane (4b) products. The crystal structures of 5 and diazepane 4b are described. Compound 5 crystallized from methanol in the monoclinic system, P21 space group with unit cell parameters a = 15.3402(9), b = 7.2717(4), c = 22.5803(13), β = 106.8620(10) and a cell volume of 2410.5(2) A3. 相似文献10.
Abstract
A pair of copper(II) complexes, [CuL1(ONO2)(OH2)] 1 and [CuBrL2N3] 2, where L1 is 5-methoxy-2-[(2-morpholin-4-ylethylimino)methyl]phenolate, and L2 is (2-morpholin-4-ylethyl)-(1-pyridin-2-ylethylidene)amine, have been synthesized and characterized by elemental analysis, IR spectra and single crystal X-ray diffraction. Complex 1 crystallizes in the monoclinic space group P21/c, with a = 10.496(2), b = 19.113(3), c = 8.586(2) ?, β = 105.186(10)°. Complex 2 crystallizes in the monoclinic space group C2/c, with a = 16.606(3), b = 7.357(2), c = 26.043(5) ?, β = 94.996(2)°. The Cu atom in each complex is five-coordinate in a square pyramidal geometry. 相似文献11.
Xiangshan Wang Daqing Shi Shujiang Tu Changsheng Yao 《Journal of chemical crystallography》2004,34(2):159-165
The title compounds 2-amino-3-cyano-4-(2-chlorophenyl)-1,4-dihydro-2H-pyrano[3, 2-h]quinoline 1 (C19H12ClN3O, M
r = 333.77) and 2-amino-3-cyano-4-(2-chlorophenyl)-8-(2-chlorobenzylidene)-1,4,5,6,7,8-hexahydrobenzo[b]pyran 2 were synthesized and crystallized. The crystals of compound 1 are triclinic, space group P-1, a = 7.488(2), b = 9.127(3), c = 12.252(3) Å, = 73.58(2), = 78.38(2)°, = 75.39(2), Z = 2, V = 769.5(4) Å3; The compound 2 crystallizes in space group P21/n, with cell parameters a = 13.582(2), b = 8.974(1), c = 16.960(2) Å, = 103.34(1)° and D
calc = 1.352 g/cm–3 for Z = 4. X-ray analysis reveals that atoms C(1)—C(5) and O form a pyran ring in compound 1, which adopts half-chair conformation. In compound 2 the atoms C(12)—C(16) and O form a pyran ring which adopts boat conformation, another six-membered ring (C(8)—C(13)) adopts a half-chair conformation. In addition, there are intermolecular hydrogen bonds in the crystal structures 1 and 2. 相似文献
12.
Abstract
The reactions of CrCl2 with two N-heterocyclic carbenes (NHC) have afforded the complexes, trans-[CrCl2(NHC)2] (NHC = :C{N(C6H3Pr2i-2,6)C(H)}2 1 or :C{N(Pri)C(Me)}2 2). The cell parameters of the compounds are 1: P212121, a = 12.9445(4), b = 20.7364(5), c = 21.2841(6); 2: Pca21, a = 21.7583(14), b = 9.9465(8), c = 11.4414(9). The crystal structures of the complexes are the first for NHC adducts of CrCl2, and both exhibit square planar chromium centers. 相似文献13.
Abimael D. Rodríguez Ana L. Acosta Songping D. Huang 《Journal of chemical crystallography》1998,28(1):17-21
3,7-Diiodo-4,8-epoxy-euniolide (2) was synthesized from euniolide (1) by the addition reaction of iodine in the presence of triphenylphosphine in CH2Cl2. The absolute structure of 2 was unambiguously determined by a combination of 1H and 13C NMR, HREI mass spectroscopy, and x-ray single crystal analysis as (11E, 1S, 3S, 4R, 7S, 8R, 14S)-3,7-diiodo-4,8-epoxy-cembra-11,15-dien-16,14-olide. X-ray crystallographic data for 2: Orthorhombic P212121 (#19), a = 10.9688(7), b = 11.3909(8), c = 16.885(1) Å, calcd = 1.795 g cm–3, and for Z = 4. 相似文献
14.
Abstract
The reaction of [Ni(L)]Cl2·2H2O (L = 3,14-dimethyl-2,6,13,17-tetraazatricyclo[14,4,01.18,07.12]docosane) with pyrazine-2-carboxylic acid (H-pyc) yields mononuclear nickel(II) complex, [Ni(L)(pyc)2]·2H2O (1). This complex has been characterized by X-ray crystallography, electronic absorption and cyclic voltammetry. The crystal structure of 1 exhibits a distorted octahedral geometry with four nitrogen atoms of the macrocycle and two pyrazine-2-carboxylate ligands. It crystallizes in the triclinic system P-1 with a = 9.6643(17), b = 10.116(3), c = 16.99(4) ?, V = 1633(3) ?3, Z = 2. Electronic spectrum of 1 also reveals a high-spin octahedral environment. Cyclic voltammetry of 1 undergoes two waves of a one-electron transfer corresponding to NiII/NiIII and NiII/NiI processes. 相似文献15.
Abstract
The title compound, 5-chloro-3-methyl-1-phenyl-1H-pyrazole-4-carbaldehyde 2, was prepared in a series of syntheses to produce new pyrazole derivatives, and its crystal structure was determined by X-ray diffraction method. The crystal belongs to monoclinic, space group P21/c with unit cell parameters a = 6.7637(4) ?, b = 6.8712(3) ?, c = 22.4188(10) ?, β = 93.8458(14)o, V = 1039.56(9) ?3 and Z = 4. X-Ray reveals that the aldehydic fragment is almost coplanar with the adjacent pyrazole ring, but the two ring planes are inclined at 72.8(1)o. The molecule is linked to its neighbor by two directionally specific C–H···O interactions. 相似文献16.
Chunyi Liu Zuoxiang Wang Hailian Xiao Yan Lan Xiaomin Li Songpei Wang Jie Tang Zhengping Chen 《Journal of chemical crystallography》2009,39(12):881-884
Abstract
The title compound, 3-methyl-4-phenyl-5-(2-pyridyl)-1,2,4-triazole was synthesized by reaction of diphenylphosphazoanilide with N-acetyl-N′-(2-pyridoyl)hydrazine. Crystals suitable for X-ray analysis were obtained from a mixed solution of water and ethanol in a one-to-one volume ratio. The crystal is orthorhombic, space group P212121 with crystallographic parameters: a = 19.414(4) Å, b = 17.172(3) Å, c = 7.4850(15) Å, β = 90.00°, μ = 0.079 mm−1, V = 2495.3(8) Å3, Z = 8, Dc = 1.258 g/cm3, F(000) = 992, T = 295(2) K. The X-ray results showed that in the crystal structure of the title compound, the 1,2,4-triazole, pyridine and benzene rings are not coplanar. 相似文献17.
Molecular and crystal structure of 2-methyl-3-(2-nitro-phenyl)-4-phenyl-[1,2,4]oxadiazolidin-5-one, C15H13N3O4, have been determined by single crystal X-ray diffraction study. The title compound is monoclinic, with a = 10.0313(8) Å, b = 9.0372(5) Å, c = 15.5964(14) Å, β = 96.926(7)∘, Z = 4, Dx = 1.42 g/cm3, μ (Mo-Kα) = 0.105 mm−1, and space group is P 21/c. The structure was solved by direct methods and refined to a final R = 0.036 for 1894 reflections with I > 4σ (I). The crystal structure is stabilized by C–H⋅sO type inter-molecular, C–H⋅sN and C–H⋅sO type intra-molecular, π–π stacking and edge to face (C–H⋅s π-ring) interactions. To enlighten conformational flexibility of the title molecule, selected two torsion angles are varied from −180∘ to +180∘ in every 10∘ separetely and then molecular energy profile is calculated and construed. 相似文献
18.
Mustafa Yıldız Hava Özay Hüseyin Ünver Nazan Ocak İskeleli D. Mehmet Zengin Tahsin Nuri Durlu 《Journal of chemical crystallography》2010,40(11):909-913
Abstract
Schiff base (E)-2-[(benzo[d]thiazol-2-ylimino)methyl]phenol (1) has been synthesized from the reaction of 2-hydroxy-benzaldehyde with 2-aminobenzothiazole. The 2-[(benzo[d]thiazol-2-ylamino)methyl]phenol (2) was prepared reduction of the Schiff base 1 with sodium borohydride. The compounds 1 and 2 have been characterized by elemental analysis, FT-IR, 1H-NMR, 13C-NMR and UV–visible spectroscopic techniques. The structure of the compound 2 has also been examined crystallographically. The compound 2 crystallizes in the monoclinic space group P2/c. The unit cell parameters were found as a = 10.017(1), b = 11.725(1), c = 10.341(1) ?, V = 1208.1(1) ?3, D x = 1.409 g cm−3 and Z = 4. The crystal structure was solved by direct methods and refined by the full-matrix least squares method and found as R 1 = 0.0308 and wR 2 = 0.0818 for 2032 for the observed reflections [I > 2σ(I)]. 相似文献19.
Hong Zhou Hai-Bao Duan Zhen-Fang Tian Hui Zhang 《Journal of chemical crystallography》2011,41(5):684-687
Abstract
An new ion-pair compound, [CH3BzQl][Ni(mnt)2] (1), (CH3BzQl = 1-(4′-methobenzyl)isoquinolinium and mnt2− = maleonitriledithiolate), has been synthesized, structurally and magnetically characterized. The [Ni(mnt)2]− anions (A) and [CH3BzIQl]+ cations (C) of 1 alternate to form a mixed columnar stack in the manner of ···ACAC··· along the a-axis, and the neighboring columns connect together to generate a three-dimensional (3D) network structure via intermolecular H-bonding interactions and van der Waals forces. Variable-temperature magnetic susceptibility measurements in the temperature range 2–300 K show that 1 is a spin gap system with strong antiferromagnetic interaction. 相似文献20.
The synthesis and structure characterization of 2-propyl-5-phenyl-1,4-dioxo-1,2,3,4,5, 6,7,8-octahydro-[1,4,2]diazaphosphorino[1,2-a][1,3,2]benzodiazaphosphorine 3-oxide are described. The title compound has been designed to incorporate proximate carbonyl and phosphoryl groups in a heterocycle fused to benzophosphadiamide heterocycle. Crystal data: C19H20N3O3P, Monoclinic, space group P2(1)/c, with a = 9.7585(9) Å, b = 21.4319(19) Å, c = 17.7900(16) Å, β = 100.823(2)°, Z = 8, V = 3654.5(6) Å3. The crystal structure shows that the proximate carbonyl and phosphoryl groups are not coplanar, and the [1,4,2]diazaphosphorino moiety prefers the boat conformation. 相似文献