共查询到20条相似文献,搜索用时 11 毫秒
1.
O. M. Usov E. V. Tret'yakov L. L. Sveshnikova M. S. Shvartsberg 《Russian Chemical Bulletin》1995,44(10):1929-1932
Acyl derivatives of 2-aminopyridine, 2-aminopyrimidine, 4-amino-2,2,6,6-tetramethylpiperidine-1-oxyl, and 4-hydroxy-2,2,6,6-tetramethylpiperidine-1-oxyl were obtained from long-chain diacetylenic acyl chlorides and the corresponding heterocyclic compounds. Spreading isotherms of monolayers on a water surface show that lengthening of the hydrocarbon chain and replacement of the pyridyl groups in these compounds by the more hydrophilic pyrimidyl groups render the films more condensed. Long-chain acyl derivatives of nitroxyl radicals form monolayers possesing a low collapse pressure. ESR spectra of Langmuir-Blodgett films of these radicals before and after photopolymerization were recorded.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 2009–2012, October, 1995.The authors are grateful to S. A. Dzyuba for his help in recording ESR spectra and for helpful discussion.This work was financially supported by the Russian Foundation for Basic Research (Project No. 93-03-04027). 相似文献
2.
N. I. Makarova M. I. Knyazhanskii O. S. Filipenko D. S. Bulgarevich V. A. Kharlanov S. V. Borodaev S. M. Aldoshin 《Russian Chemical Bulletin》1995,44(9):1662-1666
The structure and photochemical properties of 6-methyl-2,4-diphenyl-1-(p-tolyl)pyrimidinium perchlorate (1) and 4,8-dimethyl-2-phenylpyrimido[1,2-f]phenanthridinium (2) formed as a result of photocyclization of1 have been studied. The crystal structure of compound1 has been studied at –140 °C and 25 °C. In cation1, theN-tolyl substituent and -Ph ring are noncoplanar with the pyrimidinium fragment (the angles are 67.9° and 41.1°, respectively), while the angle between the -Ph ring and the pyrimidinium moiety is only 7.1° (–140 °C). The photocyclization product2 has a flattened structure.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 9, pp. 1731–1735, September, 1995.This work was partly (studies performed at Scientific Research Institute of Physical and Organic Chemistry at Rostov State University) supported by the Science Foundation Russian Universities. 相似文献
3.
2,4,6-Tris(2-pyridyl)-1,3,5-triazine (tptz) undergoes hydrolysis in the presence of copper(II) acetate affording bis(2-pyridylcarbonyl)amido-copper(II) and free 2-pyridylcarboxylic anion. Two compounds of formulas [Cu(NC5H4COO)2]·2H2O (1) and [Cu(NC5H4CO)2N(tptz)](N(CN)2)·7H2O (2), where NC5H4COO? and (NC5H4CO)2N? are 2-pyridylcarboxylate and bis(2-pyridylcarbonyl)amido-anion, respectively, were obtained from methanol/ethanol solution of tptz with copper acetate; they were characterized by element analysis and single crystal X-ray diffraction method. Single crystal XRD analysis shows that in complex 1 coordination number around Cu atom is 4 with distorted square-planar coordination geometry and in complex 2 coordination number around Cu atom is 6 with distorted octahedral geometry. Crystal data for 1: a = 5.1359(10) Å, b = 7.6471(15) Å, c = 9.2303(18) Å, α = 74.90(3)°, β = 84.36(3)°, γ = 71.37(3)°, space group P1, crystal system triclinic, Z = 1, V = 331.6(1) Å3, d calc = 1.721 g/cm3. Crystallographic data for 2: space group C2/c, crystal system monoclinic, a = 23.976(5) Å, b = 15.465(3) Å, c = 18.649(4) Å, β = 92.66(3)°, V = 6907(2) Å3, d calc = 1.0448 g/cm3, Z = 4. 相似文献
4.
Levchenkov D. V. Kharitonkin A. B. Shlyapochnikov V. A. 《Russian Chemical Bulletin》2001,50(3):385-389
The molecular structures of trinitromethane derivatives XC(NO2)3 (X = F, Cl, Br, NC, NF2, N3) were studied using the density functional approach. The rules for changing the configurations of substituents in these compounds were revealed. Acceptability of the method employed for the calculations of trinitromethane derivatives is discussed. 相似文献
5.
T. K. Gar O. A. Dombrova D. A. Ivashchenko V. F. Mironov 《Russian Chemical Bulletin》1993,42(10):1717-1723
The formation of trichlorogermyl-substituted amides, lactams, and imides occurs when 2Et2O·HGeCl3 is condensed with compounds possessing the -NCH2Cl fragment and equally well when HGeCl3 interacts with compounds containing -NCH2OH and-NCH2OSiMe3 groups. In some cases, the use of the latter is more advantageous from the preparative point of view. In compounds thus obtained,
the germanium is five-coordinate due to the coordination
.
Deceased August 13, 1993.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 1793–1799, October, 1993. 相似文献
6.
I. V. Ovchinnikov A. S. Kulikov M. A. Epishina N. N. Makhova V. A. Tartakovsky 《Russian Chemical Bulletin》2005,54(5):1346-1349
Earlier unknown N-trinitroethyl derivatives of acetylhydrazine, 4-amino-1,2,4-triazole, and 2,4,6-triamino-1,3,5-triazine, which are potential
components for gas-generating formulations, were synthesized.
Dedicated to Academician N. K. Kochetkov on the occasion of his 90th birthday.
__________
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 5, pp. 1306–1309, May, 2005. 相似文献
7.
Shtamburg V. G. Klots E. A. Pleshkova A. P. Avramenko V. I. Ivonin S. P. Tsygankov A. V. Kostyanovsky R. G. 《Russian Chemical Bulletin》2003,52(10):2251-2260
Procedures were developed for the synthesis of N-acyloxy-N-alkoxy derivatives of ureas, carbamates, and benzamides by the reactions of the corresponding N-alkoxy-N-chloro derivatives with sodium carboxylates in MeCN. N-Chloro-N-ethoxy-p-toluenesulfonamide was inert in this reaction. Alcoholysis of N-acyloxy-N-alkoxy derivatives of ureas, carbamates, and tert-alkylamines afforded the corresponding N,N-dialkoxy derivatives, whereas alcoholysis of N-acetoxy-N-ethoxybenzamide gave rise to alkyl benzoates. 相似文献
8.
N-2-亚甲基-呋喃-二茂铁芳胺衍生物的合成与晶体结构及电化学性质 总被引:1,自引:0,他引:1
以邻、间、对-二茂铁苯胺为原料,合成了新的含呋喃二茂铁苯基席夫碱衍生物,还原得到N-2-亚甲基-呋喃-二茂铁芳胺衍生物,通过元素分析,IR,1H NMR和X-射线单晶衍射等分析手段,确证了标题化合物的组成和结构,化合物2 c单晶结构解析表明,2 c属于单斜晶系,P2/n空间群;其HOMO轨道主要由Fe原子及茂环上C的原子轨道组成,LUMO主要由O、N和苯环上C原子构成;电化学实验证明:邻、间、对化合物的电化学性质相似,苯环上取代基位置的不同,对化合物在电极表面的扩散系数影响不大,但对反应速率常数有较大的影响. 相似文献
9.
3,5-二羟基-2,4,6-三硝基苯酚铷的晶体结构和热行为 总被引:1,自引:0,他引:1
0IntroductionSom e nitrogen鄄rich alkaline and alkali鄄earth m et鄄als com pounds of polynitro hydroxybenzenes can beused environm entally friendly prim ary explosives[1 ̄5].2,4,6鄄Trinitro鄄1,3,5鄄trihydroxybenzene(trinitrophloroglu鄄cinol,TNPG)belongs to a polynitro hydroxybenzeneand has been used in chem icalindustry as an ingredi鄄entfor prim ing com position,percussion caps and deto鄄nator form ulations[6].Therefore,in recent years,ithasbeen exploited to prepare a num ber of salts of ba… 相似文献
10.
对氯苯基硫脲和2,4,6-三溴苯基硫脲的晶体结构和分子结构 总被引:1,自引:0,他引:1
本文报道对氯苯基硫脲(Ⅰ)和2,4,6-三溴苯基硫脲(Ⅱ)的晶体结构和分子结构,(Ⅰ)属单斜晶系,空间群P2_1/a,a=10.671(1),b=8.912(1),c=9.128(1),β=106.85(1)°,Z=4,D_c=1.492g/cm~(-3),最后的偏离因子R=0.029,R_w=0.031;(Ⅱ)属正交晶系,空间群Pcab,a=9.997(2),b=7.876(4),c=27.920(3),Z=8,D_c=2.35g/cm~(-3),最后的偏离因子R=0.047,R_w=0.047。晶体结构测定结果表明,硫脲部分的四个原子组成平面三角形,苯环平面与硫脲平面的夹角分别为70.1°和80.3°。 相似文献
11.
N. A. Orlova F. A. Zhuravlev V. V. Shelkovnikov T. N. Gerasimova 《Russian Chemical Bulletin》1995,44(6):1084-1086
A new method for synthesis of 1-[(2-acryloyloxyethyl)- and 1-[(2-propenyl)-2-(2-(1H)-quinolidene)-methyl]-1-ethylquinolinium iodides was proposed. The structures of the dyes obtained were studied by1H NMR spectroscopy.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 6, pp. 1122–1124, June, 1995.This work was supported by the Russian Foundation for Basic Research (Project No. 93-02-3467) and the International Science Foundation (Grant RCO 000). 相似文献
12.
E. I. Matrosov A. G. Matveeva S. V. Matveev Yu. M. Potikarpov B. K. Shcherbakov M. I. Kabachnik 《Russian Chemical Bulletin》1994,43(11):1902-1907
Mono- and diperchlorates of phosphorylated diazacycloalkanes (PDAC),viz. 1,5-bis(2-diphenylphosphorylethyl) -1,5-diazacyclooctanes (1a, 1b), 1,4-bis(2-diphenylphosphorylethyl)- 1,4-piperazine (2a), and 1-methyl-4-(2-diphenylphosphorylethyl)-1,4-piperazines (3a, 3b), were prepared. The formation of inter- and intramolecular hydrogen bonds in PDAC perchlorates and some model compounds in the solid state and in solution was investigated by IR spectroscopy. The dependence between the effect of the hydrogen bond formation and association of the ions in solution was analyzed. Conformational analysis of the cations of PDAC was carried out.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 11, pp. 2013–2018, November, 1994.This study was carried out with the financial support of the International Science Foundation (Grant No. MJN 000). 相似文献
13.
A. D. Kirilin A. A. Dokuchaev I. N. Menchaikina E. A. Chernyshev 《Russian Chemical Bulletin》1996,45(10):2279-2286
The results of studies dealing with the synthesis of six- and ten-membered silicon-nitrogen-containing heterocyclic compounds are presented. The structures and reactivities of these compounds have been studied. High reactivities of 2,5-disilapiperazines and 1,6-dioxa-3,8-diaza-5,10-disilacyclodecane-2,7-dione derivatives have been noted. Possible schemes of the formation of these compounds are discussed.Translated fromIzvestiya Akademii Nauk, Seriya Khimicheskaya, No. 10, pp. 2407–2414, October, 1996. 相似文献
14.
L. B. Kulikova G. I. Ezhova N. E. Kravchenko O. V. Dorofeeva A. S. Kulikov A. G. Zavozin 《Russian Chemical Bulletin》2007,56(8):1631-1636
Conditions for N-acylation of 2-amino-5-aryl-6H-1,3,4-thiadiazines with trifluoroacetic anhydride and halogen-substituted carboxylic acid halides with retention of the initial
heterocyclic system were found. 5-Aryl-2-haloacylamino-6H-1,3,4-thiadiazines were obtained in preparative yields. Their reactions with hetarenethiols afforded N-hetarylthioacyl derivatives.
Dedicated to Academician V. A. Tartakovsky on the occasion of his 75th birthday.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 8, pp. 1570–1575, August, 2007. 相似文献
15.
P. V. Arbuzov M. G. Voronkov R. G. Mirskov E. V. Bakhareva V. I. Rakhin 《Russian Chemical Bulletin》1996,45(3):720-721
The photoinduced reaction ofN-trialkylstannyl-N-triorganylsilyl-substituted allylamines with perfluorocarbonyl iodides results in the formation of 1-triorganylsilyl-2-(,a-dihydroperfluoroalkyl)aziridines.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya. No. 3, pp 759–760, March, 1996. 相似文献
16.
Ulrich Siemeling Sabine Tomm Clemens Bruhn 《Journal of organometallic chemistry》2006,691(23):5056-5059
The pyrazinium salt [FcCH2pyz][BF4] (1) and the quinoxalinium salt [FcCH2quin][BF4] (2) were prepared by the reaction of [FcCH2][BF4] with pyrazine and quinoxaline, respectively and characterised by spectroscopic methods, cyclic voltammetry and by single-crystal X-ray diffraction, which revealed the absence of any π-π-stacking motifs in the crystal structures. 相似文献
17.
Baukov Yu. I. Shipov A. G. Ovchinnikov Yu. E. Struchkov Yu. T. 《Russian Chemical Bulletin》1994,43(6):917-928
The results of studies aimed at elaborating methods for synthesizing penta- and hexacoordinated organogermanium derivatives containing lactamo-N-methyl and related bidentate ligands and investigating their structure and reactivity are reviewed. In these compounds the germanium coordination units include one or two O(or S)-Ge-X or N-Ge-X (X — an electron-deficient group) hypervalent fragments.The review is based on the report at the conference Workshop on the Modern Problems of Heteroorganic Chemistry, Moscow, May 8–13, 1993.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 6, pp. 982–993, June, 1994. 相似文献
18.
L. I. Zakharkin V. A. Ol'shevskaya V. V. Guseva N. F. Shemyakin 《Russian Chemical Bulletin》1998,47(3):475-477
Silyl-substitutedo-carboranes 1-R-2-Me3Si(CH2)
n
-1,2-C2B10H10 (R=Me, Ph;n=0, 1) undergo transmetallation on treatment with BunLi to form lithium derivatives ofo-carboranes, 1-R-2-Li(CH2)
n
-1,2-C2B10H10, wheren=0, 1. A silicon derivative ofo-carborane, 1-Ph-2-(Me3SiCHPh)-1,2-C2B10H10, undergoes neither transmetallation nor metallation at the benzyl CH-group on treatment with BunLi due to significant steric hindrance.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 3, pp. 492–494, March, 1998. 相似文献
19.
L. S. Khaikin O. E. Grikina V. A. Sipachev A. A. Granovsky V. S. Nikitin 《Russian Chemical Bulletin》2000,49(4):620-630
The geometry and force fields of the bis(trimethylstannyl)acetylene molecule (a conformer withD
3d
symmetry corresponding to a minimum of the total energy of the molecule) were calculated by the RHF and MP2(fc) methods.
The effective core potential in SBK form with the optimized 31G* valence basis set was employed in the case of Sn atoms. The 6–31G** and 6–311G** basis sets were used for carbon and hydrogen atoms. Vibrational spectra of the light and perdeuterated isotopomers of bis(trimethylstannyl)acetylene
were interpreted using the procedure of scaling the quantum-chemical force fields.
For Part 5, see Ref. 1.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 4, pp. 616–626, April, 2000. 相似文献
20.
Shujuan Yao Chenggang Zhou Jinping Wu Jiaye Li Bo Han Hansong Cheng 《International journal of quantum chemistry》2008,108(9):1565-1571
We present a theoretical study on the electronic structure and spectroscopic properties of polyyne and its derivatives using periodic density functional theory study and semiempirical ZINDO/s methods. The electronic density of states were calculated, which indicates that polyyne behaves like a semiconductor and the insertion of aromatic groups into the polymer chain gives rise to significant metallic characters in the materials. The vibrational and UV–vis spectra of polyyne and its derivatives were simulated using a monomer or oligomer model. The effects of aromatic insertion into polyyne chain on their electronic and spectroscopic properties were discussed. © 2008 Wiley Periodicals, Inc. Int J Quantum Chem, 2008 相似文献