Results 161 to 170 of about 3,168 (197)

Antiviral 1,3,4-Thiadiazoles

Chemotherapy, 1974
Three antiviral 1,3,4-thiadiazoles caused, when incubated together with 3H-uridine, a reduction of the incorporation rate into acid-insoluble material of FL cells.
Marion Tonew, Elke Klimke
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Microwave spectra of 1,3,4-thiadiazole and [34S]1,3,4-thiadiazole. Dipole moment of 1,3,4-thiadiazole

Journal of Molecular Spectroscopy, 1962
Abstract The microwave spectra of 1, 3, 4-thiadiazole (I) and [ 34 S] 1, 3, 4-thiadiazole (II) have been recorded in the 15,000–30,000 Mc/sec region. Twelve and ten transitions, respectively, were assigned. The rotational constants of (I) are, A = 8907.51 ± 0.10, B = 5569.27 ± 0.02, and C = 3424.80 ± 0.03 Mc/sec. For (II), A = 8908.15 ± 0.20,
Børge Bak, Daniel Christensen, Lise Hansen-Nygaard, Leif Lipschitz, John Rastrup-Andersen   +4 more
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Kristallin‐flüssige 1,3,4‐Thiadiazole. II [1]. 1,3,4‐Thiadiazole mit Cyclohexanstrukturfragmenten

Journal für Praktische Chemie, 1989
Liquid Crystalline 1,3,4‐Thiadiazoles. II. 1,3,4‐Thiadiazoles with CyclohexanefragmentsPreparation and liquid crystalline properties of disubstituted 1,3,4‐thiadiazoles (1 and 2) are described. The mesomorphic behaviour of the title compounds is compared with their benzoate analogues. The dielectric anisotropy of these compounds is negative.
W. Schäfer, U. Rosenfeld, H. Zaschke, H. Stettin, H. Kresse   +4 more
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1,3,4- Thiadiazoles—III

Tetrahedron, 1968
Abstract Some 2-aryl-5-chloro-1,3,4-thiadiazoles (I; X = Cl) were treated with several nucleophilic agents in different solvents. Displacement of chlorine by piperidine was chosen for a kinetic study in ethanol and in benzene, in the temperature range 30–60°.
A. Alemagna, T. Bacchetti, P. Beltrame
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Synthesis of 1,3,4-thiadiazole oligomers

Journal of the Chemical Society, Perkin Transactions 1, 2002
AbstractFor Abstract see ChemInform Abstract in Full Text.
Van‐Duc Le, Charles W. Rees, Sivaprasad Sivadasan   +2 more
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Kristallin‐flüssige 1,3,4‐Thiadiazole. I. Biphenyl‐ und terphenylanaloge 1,3,4‐Thiadiazole

Journal für Praktische Chemie, 1980
Liquid Crystalline 1,3,4‐Thiadiazoles. I. Biphenyl‐ and Terphenyl Analogous 1,3,4‐ThiadiazolesThe synthesis of disubstituted 1,3,4‐ and 1,2,4‐thiadiazoles and 1,3,4‐oxadiazoles is described and their melting and clearing points are investigated. The influence of the heterocyclic ring system on the formation of crystalline liquid phases is discussed.
K. Dimitrowa, J. Hauschild, H. Zaschke, H. Schubert   +3 more
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Copper(II) complexes of 2-amino-1,3,4-thiadiazole and 2-ethylamino-1,3,4-thiadiazole

Transition Metal Chemistry, 1982
Some copper(II) complexes of 2-amino-1,3,4-thiadiazole (atz) and 2-ethylamino-1,3,4-thiadiazole (eatz) have been prepared and studied by electronic, i.r. and e.p.r. spectra and by magnetochemical and conductometric methods. The CuX2 · atz (X=Cl, Br) and CuCl2 · eatz complexes are presumably six-coordinate with bridging ligand molecules and ...
Antonio C. Fabretti, Gian Carlo Franchini, Giorgio Peyronel   +2 more
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1,3,4‐Thiadiazoles

ChemInform, 2005
AbstractFor Abstract see ChemInform Abstract in Full Text.
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1,3,4-THIADIAZOLES FROM THIOSEMICARBAZIDES

Phosphorus, Sulfur, and Silicon and the Related Elements, 1991
Abstract A new method for the synthesis of 1,3,4-thiadiazoles is described. Thus condensation of 4-methyl-4phenyl-3-thiosemicarbazide with an aldehyde or ketone affords 1,1-disubstituted-6-[1-(arylethylidine) amino] −2,5-dithiobiureas, rather than the anticipated 4,4-disubstituted-3-thiosemicarbazones.
John P. Scovill, Daniel L. Klayman, Judith L. Flippen-anderson, Richard Gilardi   +3 more
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Microwave spectra of isotopic 1,3,4-thiadiazoles. Molecular structure of 1,3,4-thiadiazole

Journal of Molecular Spectroscopy, 1966
Abstract The microwave spectra of 2-D-, 2-13C-, and 3-15N-1,3,4-thiadiazole, C2H2N2S, were assigned and combined with earlier measurements to give a substitution structure of 1,3,4-thiadiazole. The molecule is planar with the following structural parameters: S,C=1.721A C,N=1.302A N,N=1.371A C,H=1.077A The result is ...
B. Bak, L. Nygaard, E.J. Pedersen, J. Rastrup-Andersen   +3 more
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