Tautomerism of pyrazoline-5-thione and triazoline-5-thione studied by variable temperature photoelectron spectroscopy
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چکیده
منابع مشابه
4-Ethyl-3-(2-thienylmethyl)-Δ2-1,2,4-triazoline-5-thione
The title compound, C(9)H(11)N(3)S(2), exists in the thione form in the crystal structure. The central triazole ring is almost perpendicular to the thio-phene ring which is disordered over two orientations [dihedral angles of 88.5 (7) and 85.7 (8)° for the two orientations]. The crystal structure is stabilized by strong inter-molecular N-H⋯S hydrogen bonds, forming centrosymmetric dimers, and b...
متن کاملSynthesis, lipophilicity and antimicrobial activity of new derivatives of thiosemicarbazides and 1,2,4-triazoline-5-thione.
In the reaction of hydrazide of 3,4-dimethoxyphenylacetic acid (1) with isothiocyanate the respective thiosemicarbazide derivatives (2) were obtained. Further cyclization with 2% NaOH led to the formation of 3-[(3,4-dimethoxyphenyl)methyl]-4-substituted-1,2,4-triazoline-5-thiones (3). The structures of all new products were confirmed by analytical and spectroscopic methods. All compounds were s...
متن کامل5-Ethoxy-1,3,4-thiadiazole-2(3H)-thione
In the title compound, C(4)H(6)N(2)OS(2), the dihedral angle between the five-membered heterocyclic ring and the plane of the eth-oxy group is 4.9 (2)°. The 1,3,4-thiadiazole-2-thione unit is planar, with an r.m.s. deviation of 0.011 Å from the corresponding squares plane defined by the seven constituent atoms. In the crystal, pairs of N-H⋯S hydrogen bonds link the mol-ecules into inversion dim...
متن کامل5-Furan-2yl[1,3,4]oxadiazole-2-thiol, 5-furan-2yl-4H [1,2,4] triazole-3-thiol and their thiol-thione tautomerism.
5-Furan-2-yl[1,3,4]oxadiazole-2-thiol (Ia) and 5-furan-2-yl-4H-[1,2,4]-triazole-3-thiol (Ib) were synthesized from furan-2-carboxylic acid hydrazide. Mannich bases and methyl derivatives were then prepared. The structures of the synthesized compounds were confirmed by elemental analyses, IR and (1)H-NMR spectra. Their thiol-thione tautomeric equilibrium is described.
متن کاملThe Potentiodynamic Behavior of Copper in NaCI Solutions Studied by Auger and Photoelectron Spectroscopy
The potentiodynamic behaviour of copper in brine solutions was studies. Auger and photo-electron spectroscopy were used together with electrochemical methods. It is demostrated that the passivation observed in potentiodynamic curves is due to a surface film formation on a copper electrode. It is concluded that this film must be copper (I) chloride in nature. Effect of different factors on poten...
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ژورنال
عنوان ژورنال: Canadian Journal of Chemistry
سال: 1983
ISSN: 0008-4042,1480-3291
DOI: 10.1139/v83-214