Results 181 to 190 of about 8,057 (210)

Molecular vibrations of pyridine-2-thione and pyrimidine-2-thione

Spectrochimica Acta Part A: Molecular Spectroscopy, 1985
Molecular vibrational analyses of two biochemically important molecules, namely pyridine-2-thione and pyrimidine-2-thione, have been made for all the fundamentals employing the Urey-Bradley potential function supplemented with valence force function for the out-of-plane vibrations. The spectra of N-deuterated molecules have also been utilized.
Sathyanarayana, DN, Raja, Kasmir SV
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Five-membered Heterocyclic Thiones. Part III. 1,2,5-Thiadiazole-3-thiones

Canadian Journal of Chemistry, 1973
Stable salts of 3-mercapto-1,2,5-thiadiazoles were prepared by the alkaline hydrolysis of the corresponding N,N-dimethylthionocarbamates.
D. E. Horning, J. M. Muchowski
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Five-membered Heterocyclic Thiones. Part I. 1,3,4-Oxadiazole-2-thione

Canadian Journal of Chemistry, 1972
1,3,4-Oxadiazole-2-thione was prepared by decarboxylation of the corresponding 5-carboxylic acid. Spectral data supported the predominant, if not exclusive, existence of the thione form in solution.
D. E. Horning, J. M. Muchowski
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Thion‐ und Dithioester, XXII. α,β‐Ungesättigte Thion‐ und Dithioester

Chemische Berichte, 1980
Abstractα,β‐Ungesättigte Thion‐ und Dithioester wie Thiozimtsäure‐O‐ethylester (3), Dithiozimtsäure‐methylester (7), Thiocrotonsäure‐O‐ethylester (17) und Dithiofumarsäure‐O,O‐diethylester (28) sind durch Thiolyse aus den entsprechenden O‐ oder S‐alkylierten tertiären Amiden oder Thio‐amiden bei Temperaturen von 20 bis −75°C zugänglich.
Rainer Hoffmann, Klaus Hartke
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5-tert-Butylthiazolidine-2-thione and 5-Phenylthiazolidine-2-thione

Acta Crystallographica Section C Crystal Structure Communications, 1996
In the title compounds, C 7 H 13 NS 2 , (I), and C 9 H 9 NS 2 , (II), the heterocycle adopts a half-chair conformation with a torsion angle τ = S1-C5-C4-N3 equal to 27.5 (4)° in (I) and 30.0 (3)° in (II). In both crystals, a hydrogen bond between the thione group and the N atom is observed, the corresponding S2...N3 distance being equal to 3.367 (8)A ...
A. Laknifli, M. Pierrot, F. Chanon, M. Chanon   +3 more
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1,3-Dibenzoylimidazolidine-2-thione and 1,3-dibenzoyl-3,4,5,6-tetrahydropyrimidine-2(1H)-thione

Acta Crystallographica Section C Crystal Structure Communications, 2005
The title compounds, 1,3-dibenzoylimidazolidine-2-thione, C17H14N2O2S, (I), and 1,3-dibenzoyl-3,4,5,6-tetrahydropyrimidine-2(1H)-thione, C18H16N2O2S, (II), were obtained from the reactions of imidazolidine-2-thione and 1,4,5,6-tetrahydropyrimidine-2-thiol, respectively, with benzoyl chloride.
Kazak, C, Yılmaz, Veysel T., Servi, S, Koca, M, Heinemann, FW   +4 more
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Acylation and Alkoxycarbonylation of Benzoxazoline‐2‐thione and Benzothiazoline‐2‐thione.

ChemInform, 2004
AbstractFor Abstract see ChemInform Abstract in Full Text.
Takehiko Nishio, Kiyoko Shiwa
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Oxazolidine-2-thiones and Thiazolidine-2-thiones as Nucleophiles in Intermolecular Michael Additions

Organic Letters, 2012
Conjugate addition of thiazolidinethiones and oxazolidinethiones to N-crotonylthiazolidinethiones and -oxazolidinethiones was observed in the presence of excess triethylamine in dichloromethane. The addition takes place by the nitrogen of the heterocycle with high diastereoselectivity.
Laura, Munive, Veronica M, Rivas, Aurelio, Ortiz, Horacio F, Olivo   +3 more
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Tautomérie D'Imidazoline‐5‐Thiones

Bulletin des Sociétés Chimiques Belges, 1977
AbstractThe tautomeric behaviour of various imidazolin‐5‐thiones is examined. In the 2,2,4‐trisubstituted series, the thiocarbonyl NH form constitutes the lone tautomer observed in all types of solvents.For the 2,4,4‐trisubstituted compounds, the predominant isomer exists in the 1‐NH form and is accompagnied in most cases by a minor percentage of the 3‐
A. Maquestiau, Y. van Haverbeke, J.‐C. Vanovervelt, M. Lambert, A. Ravach   +4 more
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ChemInform Abstract: THIONE STUDIES, REACTIONS OF STABLE ALICYCLIC THIONES WITH METHYLENETRIPHENYLPHOSPHORANE

Chemischer Informationsdienst, 1975
AbstractMethylentriphenylphosphoran (I) reagiert mit Adamantanthion (II) zum Episulfid (III) und Triphenylphosphin (IV).
A. P. KRAPCHO, M. P. SILVON, S. D. FLANDERS   +2 more
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