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1.
V. G. Lakhtin V. L. Ryabkov A. V. Kisin V. M. Nosova E. A. Chernyshev 《Russian Chemical Bulletin》1999,48(2):375-378
Catalytic hydrochlorination of a series of chloro(chlorovinyl)methylsilanes was studied. The course of the reaction depends
on the number and position of the chlorine atoms in the initial monomers.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 377–380, February, 1999. 相似文献
2.
《Journal of heterocyclic chemistry》2017,54(6):3656-3662
Synthesis of 3H ‐pyrano[3,2‐f ]quinolin‐3‐one and 3H ‐benzo[h ]pyrano[3,2‐a ]acridin‐3‐one derivatives are described by the thermolysis of suitable chlorovinyl imine derivatives. The chlorovinyl imines were obtained by condensation of suitable β‐chloro‐α,β‐unsaturated aldehydes and 6‐aminocoumarin in methanol at 15°C. Compounds showed blue fluorescence in alkaline medium. 相似文献
3.
Summary Procedures were developed for the preparation of the 2-, 3-, 4-, and 6-monosubstituted chloro and bromo 8-quinolinols which afforded greater yields and/or reduced the number of steps in the preparation. 100 MHz1H-NMR spectra for the 12 possible monochloro and monobromo analogues are given.
Verbesserte Synthese von Monochlor- und Monobrom-8-chinolinolen
Zusammenfassung Es wurden Verfahren entwickelt, um 2-, 3-, 4- und 6-Chlor bzw. -Brom-8-chinolinole in besseren Ausbeuten und/oder bei reduzierter Anzahl von Synthesestufen herzustellen. Die1H-NMR-Spektren der 12 möglichen Monochlor- und Monobromverbindungen werden angegeben.相似文献
4.
Cyclocondensation of 2,4,6-triaminopyrimidine ( 10 ) with chlorovinyl aldehyde 7 afforded the linear regioisomer 9,1 1-diamino-5,6-dihydrobenzo[f]pyrimido[4,5-c]quinoline ( 1 ) while the cyclocondensation of 2,6-diamino-4-hydroxypyrimidine ( 11 ) or 6-amino-2,4-dihydroxypyrimidine ( 12 ) with chlorovinyl aldehyde 7 was regiospecific affording the linear regioisomers 9-amino-11-oxo-5,6-dihydrobenzo[f]pyrimido[4,5-c]quinoline ( 2 ) and 9,11-dioxo-5,6-dihydrobenzo[f]pyrimido[4,5-c]quinoline ( 3 ) respectively. The linear structures of these compounds were established by 1H nmr and 13C nmr spectral data. 相似文献
5.
K. Zhuravlev V. Tsaryuk V. Kudryashova V. Zolin Yu. Yakovlev J. Legendziewicz 《Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy》2009,72(5):1020-1025
It was found, that alkali metal-europium dinitrosalicylates of composition M3Eu(3,5-NO2-Sal)3·nH2O (M = Li, Na, K, Cs) are intense red luminophores with wide excitation band. Using methods of optical spectroscopy we studied the influence of nitrogroups and alkali metal counterions on Eu3+ luminescence efficiency and on processes of excitation energy transfer to Eu3+ ion in compounds synthesized. The Eu3+ luminescence and Eu3+ luminescence excitation spectra, as well as vibrational IR and Raman spectra were investigated. Details of the structure of compounds were discussed. The network of hydrogen bonds in lanthanide dinitrosalicylates is weakening at introduction of large alkali metal ions in compounds and at the increase of the temperature. As a consequence, the long-wavelength shift of the intraligand charge transfer (ILCT) band in Eu3+ excitation spectra arises at inclusion of Cs+ cations instead of Li+ in the crystal lattice of europium dinitrosalicylates and at heating of these compounds. To obtain the energy of the lowest excited triplet state the phosphorescence spectra of alkali metal-gadolinium compounds M3Gd(3,5-NO2-Sal)3·nH2O, of alkali metal dinitrosalicylate and salicylate salts were measured with time delay. Change of the energies of ligand electronic states and ligand–metal charge transfer state (LM CTS) can give a two-three orders of magnitude enhancement of the Eu3+ luminescence efficiency in dinitrosalicylates in comparison with salicylates and ten-fold enhancement at the substitution of Li+ and Na+ for Cs+ in dinitrosalicylates. 相似文献
6.
V. I. Zdanovich V. Yu. Lagunova F. M. Dolgushin A. I. Yanovsky M. G. Ezernitskaya P. V. Petrovskii A. A. Koridze 《Russian Chemical Bulletin》1998,47(9):1789-1796
Ruthenium carbonyl triphenylphosphine complexes Ru2(CO)6−n
(PPh3)
n
{μ-C(CH=CHPh)C(Ph)C(CH=CHPh)C(Ph)} (n=1, 2) were obtained by the reaction of complex Ru2(CO)6{μ-C(CH=CHPh)C(Ph)C(CH=CHPh)C(Ph)} containing the ruthenacyclopentadiene moiety with PPh3 in refluxing toluene. The complexes were characterized by IR and by1H,13C, and31P NMR spectroscopy, and by X-ray analysis. The monophosphine derivative is identical to the complex formed by fragmentation
of the Ru3(CO)8(PPh3){μ-C(CH=CHPh)C(Ph)C(CH=CHPh)C(Ph)} cluster and contains the PPh3 ligand at the ruthenium atom of the ruthenacyclopentadiene moiety.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 9, pp. 1836–1843, September, 1998 相似文献
7.
Purnima Dixit J. P. Tandon 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1-4):389-395
Abstract Some organolead(IV) complexes derived from biologically active sulfur and nitrogen donor ligands have been synthesized and characterized by elemental analyses, molecular weight determinations and conductivity measurements. The trigonal bipyramidal and octahedral geometries for these complexes have been proposed on the basis of electronic, infrared and NMR (1H and 13C) spectral evidences. The antifungal activity of some of the ligands and their complexes have also been evaluated against Fursarium oxysporum SCW. ex Frics f. sp. Ciceri (Pedwick) subram. 相似文献
8.
The reactions of the Me
n
C6H6−n
M(CO)3 (M=Cr, Mo, W;n=3, 5, 6) and C5R5M(CO)3 (M=Mn, Re; R=H, Me) complexes with propargyl alcohol in acidic media under UV irradiation were studied. Novel Me
n
C6H6−n
M(CO)2(η3-C3H3)BF4 (M=Mo, W;n=3, 5, 6) and C5R5Re(CO)2(η3-C3H3)CF3SO3 complexes with the 3ē-propargyl ligand were synthesized, and their properties compared with those of similar η3-allyl derivatives. The structure and dynamic propeties of the compounds obtained are discussed.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 9, pp. 1796–1803, September, 1999. 相似文献
9.
A. Aykut İkizler Haydar Yüksek Şule Bahçeci 《Monatshefte für Chemie / Chemical Monthly》1992,123(1-2):191-198
Summary The proton magnetic resonance spectra of 12 azoles were measured in neutral and acidic solvents. The protonation shifts observed by comparison of the spectra inDMSO-d
6 andTFA were attributed to an amidinium type resonance of the resulting cations. The synthesis and characterization of the azoles are also discussed.
1H-NMR-Spektren einiger Ditriazolyle und Ditriazolylalkane
Zusammenfassung Es wurden die1H-NMR-Spektren von 12 Azol-Verbindungen in neutralem (DMSO-d 6) und azidischem (TFA) Lösungsmittel gemessen und die chemischen Verschiebungswerte verglichen. Der Unterschied beider Werte beruht höchstwahrscheinlich auf einer Amidinium-Typ Resonanz der im azidischen Bereich entstandenen Kationen. Im Rahmen dieser Arbeit wurden 12 Azol-Verbindungen synthetisiert und beschrieben.相似文献
10.
O. G. Yarosh L. V. Zhilitskaya N. K. Yarosh A. I. Albanov M. G. Voronkov 《Russian Journal of General Chemistry》2004,74(12):1895-1899
Hydrosilylation of cyclohexene and isopropylidenecyclohexane with chloro(methyl)silanes Me3–n
SiHCln (n = 1–3) gives rise to cyclohexyl- and chloro(2-cyclohexylpropyl)methylsilanes. Hydrosilylation of 1-methylcyclohexene with chlorodimethylsilane (n = 1) occurs anomalously and involves double-bond migration to form a mixture of seven compounds: the cis and trans isomers of 2-, 3-, 4-chlorodimethyl(methylcyclohexyl)silanes and chlorodimethyl(cyclohexylmethyl)silane. Chlorodimethylsilane (n = 2) adds to 1-methylcyclohexene to form a mixture of the cis and trans isomers of dichloro(methyl)(2-methylcyclohexyl)silane and dichloro(cyclohexylmethyl)methylsilane. With trichlorosilane (n = 3), no other products than trichloro(cyclohexylmethyl)silane are formed. The hydrosilylation products were reacted with ethynylmagnesium bromide to synthesize the corresponding ethynyl derivatives.Translated from Zhurnal Obshchei Khimii, Vol. 74, No. 12, 2004, pp. 2007–2011.Original Russian Text Copyright © 2004 by O. Yarosh, Zhilitskaya, N. Yarosh, Albanov, Voronkov.This revised version was published online in April 2005 with a corrected cover date. 相似文献
11.
Synthesis,spectroscopic and thermal studies on platinum(II) complexes of 5-nitrosouracil derivatives
《Journal of Coordination Chemistry》2012,65(2):213-218
Three complexes were obtained during reactions of 6-amino-1-methyl-5-nitrosouracil, 6-methylamino-1-methyl-5-nitrosouracil and 6-methylamino-1-benzyl-5-nitrosouracil with K2PtCl4. The complexes were isolated in good yields as powdery precipitates and characterized through elemental analysis, infrared and 1H NMR spectroscopies, and thermal analysis. The pyrimidine bases easily substitute chloro ligands as a neutral monodentate ligand form. The exocyclic oxygen atoms are the probable binding sites rather than ring or exocyclic nitrogen atoms. trans Square planar structures were proposed in all cases. 相似文献
12.
E. G. Zinurova T. V. Khakimova L. V. Spirikhin M. S. Yunusov 《Chemistry of Natural Compounds》2000,36(4):387-389
The alkaloids atisine, lappaconitine, and leucostine were isolated fromAconitum septentrionaleL. seeds. The last was examined by
1
H and
13
C NMR. 相似文献
13.
V. E. Pushkarev M. O. Breusova E. V. Shulishov Yu. V. Tomilov 《Russian Chemical Bulletin》2005,54(9):2087-2093
Methods for the selective synthesis of mono-(RPcLnOAc), di-(RPc2Ln), and triphthalocyanines (RPc3Ln2) of rare-earth metals (Ln = Lu, Er, Eu) from symmetrically substituted 2,3,9,10,16,17,23,24-octaalkylphthalocyanines RPcH2 (R = Et, Bu) were developed. The synthesized complexes were characterized by NMR spectroscopy, mass spectrometry, and electronic
absorption spectra. The conditions for 1H NMR spectra recording were optimized. Regularities in changing the spectral properties of the synthesized compounds, depending
on the lanthanide nature and the planarity of metal phthalocyanine complexes, were found.
tom@org.chem.msu.su
Dedicated to Academician A. L. Buchachenko on the occasion of his 70th birthday.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 9, pp. 2024–2030, September, 2005. 相似文献
14.
Anju Midha Rajender D. Verma K. Brown R. V. Parish 《Monatshefte für Chemie / Chemical Monthly》1983,114(6-7):661-667
Mixed dialkytin(IV) trifluoroacetates,Me EtSn(O2CCF3)2,Et Pr
n
Sn(O2CCF3)2 andPr
n
Bu
n
Sn(O2CCF3)2 have been prepared by metathetical reactions of the corresponding dialkyltin(IV) chlorides with silver trifluoroacetate in CH2Cl2. They are monomeric in benzene and nonconducting inMeNO2 andMeCN. Bidentate trifluoroacetate groups are indicated by their IR spectra.Mössbauer spectra confirmtrans-arrangement of theR-Sn-R moiety.1H,19F NMR and mass spectra are also discussed.
Gemischte Dialkylzinn(IV)-trifluoracetate
Zusammenfassung Die gemischten Dialkylzinn(IV)-trifluoroacetateMe EtSn(O2CCF3)2,Et Pr n Sn(O2CCF3)2 undPr n Bu n Sn(O2CCF3)2 wurden über Metathese-Reaktionen der entsprechenden Dialkylzinn(IV)-chloride mit Silbertrifluoracetat in CH2Cl2 dargestellt. Sie sind monomer in Benzol und nichtleitend inMeNO2 undMeCN. Die IR-Spektren zeigen zweizähnige Trifluoracetat-Gruppen an. DieMössbauer-Spektren bestätigen dietrans-Anordnung derR-Sn-R-Einheit. Die1H-,19F-NMR und die Massenspektren werden ebenfalls diskutiert.相似文献
15.
V. G. Lakhtin V. L. Ryabkov M. V. Polyakova V. M. Nosova A. F. Kisin E. A. Chernyshev 《Russian Chemical Bulletin》1995,44(4):718-723
The alkoxylation and isopropylideneiminoxylation ofC-chlorovinylmethylchlorosilanes with various alcohols and acetone oxime were investigated. A series of newC-chlorovinylmethylalkoxy- and -isopropylideneiminoxysilanes was characterized by IR and1H NMR spectra. The effect of the number of chlorine atoms inC-chlorovinylmethylchlorosilanes on their reactivity in these reactions was determined.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 4, pp. 737–742, April, 1995. 相似文献
16.
V. V. Shereshovets N. M. Korotaeva F. F. Khizbullin L. M. Khalilov N. A. Mukmeneva V. D. Komissarov G. A. Tolstikov 《Russian Chemical Bulletin》1994,43(10):1663-1666
Two conformers (chair, boat) of [l-(–)-menthyl)]-[2,2-methylene-bis-(4-methyl-6-tert-butylphenyl)] phosphite ozonide have been obtained by the low temperature ozonization (–80 °C) of [l-(–)-menthyl)]-[2,2-methylene-bis-(4-methyl-6-tert-butylphenyl)] phosphite. It was determined that decomposition of the ozonide is first order with the rate constant logk
0 = (10.92±1.10)–(14.02±1.25)/gq ( = 2.303RT, kcal mol–1), leading to [l-(–)-menthyl)]-[2,2-methylene-bis-(4-methyl-6-tert-butylphenyl)] phosphate and oxygen (including singlet oxygen). Conformational transitions (chair-boat) for [l-(–)-menthyl)]-[2,2-methylene-bis-(4-methyl-6-tert-butylphenyl)] phosphate have been registered by31P NMR spectroscopy.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 1758–1761, October, 1994.This work was supported by Russian Foundation for Basic Research (Project No. 93-03-532l). 相似文献
17.
Starting from 2-isopropylidene-1,3-dithiane, various ketene-dithioacetal-S-imides have been prepared and characterized by1H- and13C-NMR spectra.
Ketendithioacetal-S-imideKurze Mitteilung相似文献
18.
L. G. Detsuheva M. A. Fedotov L. I. Kuznetsova A. A. Vlasov V. A. Likholobov 《Russian Chemical Bulletin》1997,46(5):874-880
Unsaturated heteropolyanions (HPA) [PW11O39]7− stabilize TiIV hydroxo complexes in aqueous solutions (Ti: PW11 [PW11O39]7−⪯12, pH 1–3). Spectral studies (optical,17O and31P NMR, and IR spectra) and studies by the differential dissolution method demonstrated that TiIV hydroxo complexes are stabilized through interactions of polynuclear TiIV hydroxo cations with heteropolyanions [PW11TiO40
5− formed. Depending on the reaction conditions, hydroxo cations Ti
n−1O
x
H
y
m+ either add to oxygen atoms of the W−O−Ti bridges of the heteropolyanions to form the complex [PW11TiO40·Ti
n−1O
x
H
y
]
k−
(at [HPA]=0.01 mol L−1) or interact with TiIV of the heteropolyanions through the terminal o atom to give the polynuclear complexes [PW11O39Ti−O−Ti
n−1O
x
H
y
]q− (at [HPA]=0.2 mol L−1). When the complexes of the first type were treated with H2O2, TiIV ions added peroxo groups.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 5, pp. 914–920, May, 1997. 相似文献
19.
T. V. Khakimova O. A. Pukhlyakova G. A. Shavaleeva A. A. Fatykhov E. V. Vasil'eva L. V. Spirikhin 《Chemistry of Natural Compounds》2001,37(4):356-360
A series of new N-substituted cytisine derivatives was synthesized. The
1
H and
13
C NMR spectra of certain compounds exhibit a doubled set of signals. This is explained by formation of diastereomeric pairs in compounds containing an asymmetric center in the substituents. The signal splitting in -COHC=CHCO
2
H and HC=O (formyl) derivatives is explained by the existence of Z and E invertomers. Their stereochemical features are discussed. Amide conjugation is confirmed by temperature experiments. 相似文献
20.
V. K. Cherkasov Yu. F. Rad'kov M. A. Lopatin M. N. Bochkarev 《Russian Chemical Bulletin》1994,43(11):1834-1836
Using the ESR method, equilibrium complex formation of fullerene C60 with bis-(5-cyclopentadienyl)vanadium in solutions in aromatic solvents was found to occur. Based on an analysis of isotropic (g
i
= 2.0008;A
i
,(V51)=–45.7 mT) and anisotropic (g
i
=1.9808;g
2 = 2.0135; <g
3> = 2.0060;A
1(51V)=–7.85 mT;A
2(51V) = –6.50 mT; <A
3(51V)> = 0.61 mT) ESR spectra parameters, it was established that the complex formed, Cp2V(2-C60), corresponds to vanadocene d1-complexes with 2-bonded ligands.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 11, pp. 1945–1947, November, 1994. 相似文献