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G. V. Pokhvisneva T. V. Ternikova G. A. Smirnov P. B. Gordeev S. V. Nikitin O. A. Luk´yanov 《Russian Chemical Bulletin》2017,66(7):1234-1239
A method for the synthesis of promising nitric oxide donors in living organisms, 1,1´-[methylenebis(oxy)]bis[3-alkyl-3-(2-haloethyl)triaz-1-ene 2-oxides] was elaborated. The method involved replacement of hydroxy groups of the corresponding 1,1´-[methylenebis(oxy)]bis[3-alkyl-3-(2-hydroxyethyl)triaz-1-ene 2-oxides] by halogen atoms and, in some cases, the exchange of one halogen atom for another. 相似文献
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Ferricinium bis[-(3)-1,2-dicarbollyl]cobaltate(III), [FeIII(5--Cp)2]+{CoIII[-(3)-1,2-B9C2H11]2}–, has been prepared by the reaction of FeIII(5--Cp)2]+ with the anion {CoIII[-(3)-1,2-B9C2H11]2}–. It is a light-green amorphous precipitate that is stable as a dry solid up to 227 °C and unstable in solutions of acetonitrile and acetone.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No, 10, pp. 1810–1811, October, 1994.This work was supported by the Russian Foundation for Basic Research (Project No 93-03-5987). 相似文献
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L. B. Serezhkina E. V. Peresypkina M. O. Karasev A. V. Virovets V. N. Serezhkin 《Russian Journal of Inorganic Chemistry》2013,58(2):160-165
Cs3[UO2(CH3COO)3]2[UO2(CH3COO)(NCS)2(H2O)] (I) and Cs5[UO2(CH3COO)3]3[UO2 (NCS)4(H2O)] · 2H2O (II) have been synthesized via the reaction between uranyl acetate and cesium thiocyanate in aqueous solution. According to single-crystal X-ray diffraction data, both compounds crystallize in monoclinic system with the unit cell parameters a = 18.7036(5) Å, b = 16.7787(3) Å, c = 12.9636(3) Å, β = 92.532(1)°, space group C2/c, Z = 4, R = 0.0434 (I); and a = 21.7843(3) Å, b = 24.6436(5) Å, c = 13.1942(2) Å, β = 126.482(1)°, space group Cc, Z = 4, R = 0.0273 (II). Uranium-containing structural units of compound (I) are mononuclear [UO2(CH3COO)3]? and [UO2(CH3COO)(NCS)2(H2O)]? moieties, which correspond to the AB 3 01 and AB01M 3 1 crystallochemical groups (A = UO 2 2+ , B01 = CH3COO?, M1 = NCS? and H2O). The structure of compound II is built of [UO2(CH3COO)3]? and [UO2(NCS)4(H2O)]2? complexes, which belong to the AB 3 01 and AM 5 1 crystallochemical groups, respectively. Uranium-containing complexes in both structures are linked into a framework by hydrogen bonds and electrostatic interactions with cesium cations. The IR spectra of compounds I and II agree well with X-ray diffraction data. 相似文献
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天然檀香是人们喜爱的一种高级香料。其香气甜润而富有传统的东方香型特色。由于天然檀香的产量少,价格昂贵,而且提炼天然檀香的檀香木来源日益减 相似文献
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以香草醛为原料,经Williamsom反应和Knoevenagel-Doebner反应制得新化合物3-(3-甲氧基-4-羧甲氧基苯基)丙烯酸(2);2与乙醇经酯化反应合成了阿魏酸衍生物——3-[3-甲氧基-4-(2-乙氧基-2-氧代乙氧基)苯基]丙烯酸乙酯(3),其结构经1H NMR,IR,元素分析和X-射线单晶衍射确证。3属三斜晶系,空间群P-1,晶胞参数a=8.301,b=8.474,c=11.445,α=82.94°,β=86.86°,γ=84.52°,V=794.63,Z=2,Dc=1.289 g·cm-3,R1=0.046 7,wR2=0.101 8。3通过分子间氢键(C-H┈O)形成了二维网状结构。 相似文献
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《Journal of Coordination Chemistry》2012,65(1-4):349-359
Abstract A novel peroxopolyoxomolybdate compound, [N(CH3)4]3 [H(SO4)2 (MoO2(O2))3] · 3H2O, has been obtained from a strongly acidic aqueous solution of a molybdate-sulfate system as the monoclinic crystal of P2/n, a = 13.497(3), b = 15.231(4), c = 32.603(2) Å, β = 103.113(9)°, and V = 6577(2) Å3. The final R-value was 0.0986 for 395 parameters using 7162 reflections. Each of the two crystallographically independent polyanions contains three molybdenum atoms with five O2?, one O2 2?, and two sulfate groups, one of which is a tripod ligand apical to the molybdenum plane, and the other is a bipod ligand equatorial to the Mo plane. 相似文献
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Gladysheva M. V. Plyusnin P. E. Komarov V. Yu. Tsygankova A. R. Gerasimov E. Yu. Shubin Yu. V. Korenev S. V. 《Journal of Structural Chemistry》2022,63(4):556-568
Journal of Structural Chemistry - New complex salts [Pd(NH3)4][Pd(NH3)3NO2][CrOx3]·H2O I, [Pd(NH3)4][Pd(NH3)3NO2][CoOx3]·H2O II, and a series of solid solutions... 相似文献
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用分光光度法研究了37℃、pH=5.5、0.1M NaClO4介质中cis[Pt(NH3)2Cl2]和DNA组成物--鸟嘌呤核苷、腺嘌呤核苷、胞嘧啶核苷及胸腺嘧啶核苷的作用。发现顺-[PtⅡ(NH3)2]与前三种核苷能生成组成为1:1、1:2二种络合物,与胸腺嘧啶核苷不作用。所测得一级和二级表观生成常数,以及作用初速分别有如下大小次序:Guo>Ado>Cyt》Thy;Guo>Ado>Cyt》Thy.在所得结果基础上讨论了顺-[Pt(NH3)2Cl2]和癌细胞中DNA作用的可能方式。 相似文献
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The binary group 15 polyazides As(N(3))(3), Sb(N(3))(3), and Bi(N(3))(3) were stabilized by either anion or donor-acceptor adduct formation. Crystal structures are reported for [Bi(N(3))(4)](-), [Bi(N(3))(5)](2-), [bipy·Bi(N(3))(5)](2-), [Bi(N(3))(6)](3-), bipy·As(N(3))(3), bipy·Sb(N(3))(3), and [(bipy)(2)·Bi(N(3))(3)](2). The lone valence electron pair on the central atom of these pnictogen(+III) compounds can be either sterically active or inactive. The [Bi(N(3))(5)](2-) anion possesses a sterically active lone pair and a monomeric pseudo-octahedral structure with a coordination number of 6, whereas its 2,2'-bipyridine adduct exhibits a pseudo-monocapped trigonal prismatic structure with CN 7 and a sterically inactive lone pair. Because of the high oxidizing power of Bi(+V), reactions aimed at Bi(N(3))(5) and [Bi(N(3))(6)](-) resulted in the reduction to bismuth(+III) compounds by [N(3)](-). The powder X-ray diffraction pattern of Bi(N(3))(3) was recorded at 298 K and is distinct from that calculated for Sb(N(3))(3) from its single-crystal data at 223 K. The [(bipy)(2)·Bi(N(3))(3)](2) adduct is dimeric and derived from two BiN(8) square antiprisms sharing an edge consisting of two μ(1,1)-bridging N(3) ligands and with bismuth having CN 8 and a sterically inactive lone pair. The novel bipy·As(N(3))(3) and bipy·Sb(N(3))(3) adducts are monomeric and isostructural and contain a sterically active lone pair on their central atom and a CN of 6. A systematic quantum chemical analysis of the structures of these polyazides suggests that the M06-2X density functional is well suited for the prediction of the steric activity of lone pairs in main-group chemistry. Furthermore, it was found that the solid-state structures can strongly differ from those of the free gas-phase species or those in solutions and that lone pairs that are sterically inactive in a chemical surrounding can become activated in the free isolated species. 相似文献
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Sharutin V. V. Egorova I. V. Ivanenko T. K. Sharutina O. K. Pushilin M. A. Gerasimenko A. V. Adonin N. A. Starichenko V. F. 《Russian Journal of Coordination Chemistry》2004,30(5):309-313
Bismuth tris(3-methylbenzoate) [Bi(O2CC6H4CH3-3)3] (I) and phenylbismuth bis(3,4,5-trifluorobenzoate) [PhBi(-O2CC6H2F3-3,4,5)(O2CC6H2F3-3,4,5)]2 (II) were synthesized by reacting triphenylbismuth with 3-methylbenzoic and 3,4,5-trifluorobenzoic acids. Coordination numbers of bismuth atoms in I and II are 9 and 6, respectively; carboxylate ligands function as bi- and tridentate ligands. The Bi-O distances in compound I vary in the range of 2.218(3)-3.202(4) Å. The Bi-O and Bi-C bond lengths in II are 2.301(2)-2.674(2) and 2.223(3) Å, respectively. 相似文献
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YU An-Guang WANG Nai-Xing ZHANG Jun-Ping YANG Yun-Xu WANG Wu-Wei SHENG Rui-Long 《有机化学》2004,24(Z1):31-32
Benzopyran compounds possess diverse pharmacological properties such as β-blockade, anticonvulsant and antimicrobial.[1,2] Our interest has been focused on the synthesis of 1-[6-Fluoro-2S]-3H,4H-dihydro-2H-2-chromenyl]-(1R)-1,2-ethanediol (6) and 1-[6-fluoro-(2R)-3H,4H-dihydro-2H-2-chromenyl]-(1R)-1,2-ethanediol (7) which are particularly convenient precursor to (S,R,R,R)-NE (8). 8 containing four asymmetrical carbon atoms was reported to be the most active isomer.[3] Chandrasekhar[4] has reported on the synthesis of 8. The key step to synthesize this compound is to obtain the chiral chromanone 6 and 7. 6 was accomplished in 8 steps by the Clasien rearrangement and a one-pot Sharpless asymmetric epoxidation, but the compound 7 was accomplished in 10 steps. Johannes[5] used Zr-catalytic kinetic resolution of allylic ethers and Mo-catalyzed chromene formation to synthesize 8 in 14 steps. However both of the methods request many synthetic steps and expensive reagents. 相似文献
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合成了标题配合物[Ni(en)3]2+H2dsh2- (H4dsh = 1,2-二水杨酰基肼)。晶体属正交晶系, 分子式为C20H34N8NiO4, 空间群为P212121。a = 10.5094(4), b = 12.5003(8), c = 17.487(1) , V = 2297.2(2) 3, Z = 4, Mr = 509.26, Dc = 1.472 g/cm3, = 0.889 mm-1, F(000) = 1080, R = 0.0327, wR = 0.0375。Ni(II)原子由3个乙二胺的6个氮原子形成八面体配位, NiN(en)键键长介于2.110(3)~2.151(2) 拧T诒晏馀浜衔镏?1,2-二水杨酰基肼配体以负二价的阴离子形式存在。[Ni(en)3]2+与H2dsh2-之间通过氢键相连并形成二维网络结构。 相似文献
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以6-溴-3-(氯苯基甲基)-2-甲氧基喹啉(2)为起始原料,经过偶合对接反应合成了新型喹啉类抗结核药物TMC-207的衍生物6-溴-3-[2-(6-溴-2-甲氧基喹啉-3-基)-1,2-二苯乙基]-2-甲氧基喹啉,其结构经1H NMR和HR-MS确证.最佳反应条件:2 10 mmol,Et_3N 5 mL,KI 0.17 g,乙腈150 mL,于80 ℃反应6 h,收率73%. 相似文献