Synthesis and Potentiometric Titrations of Some New 4-(Benzylideneamino)-4,5-dihydro-1H-1,2,4-triazol-5-one Derivatives in Non-Aqueous Media

2002 ◽  
Vol 67 (8) ◽  
pp. 1215-1222 ◽  
Author(s):  
Şule Bahçeci ◽  
Haydar Yüksek ◽  
Zafer Ocak ◽  
Ibrahim Azakli ◽  
Muzaffer Alkan ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Isopropyl Alcohol ◽  
Aqueous Media ◽  
Tetrabutylammonium Hydroxide ◽  
Alkyl Aryl ◽  
Neutralization Potential ◽  
Potentiometric Titrations ◽  
Derivatives Of

The synthesis of 3-alkyl(aryl)-4-[4-(dimethylamino)benzylideneamino]-4,5-dihydro-1H-1,2,4-triazol-5-ones (3) from the reactions of 3-alkyl(aryl)-4-amino-4,5-dihydro-1H-1,2,4-triazol-5-ones (2) with 4-(dimethylamino)benzaldehyde is described. The newly synthesized 3 type compounds were titrated potentiometrically with tetrabutylammonium hydroxide in three non-aqueous solvents, including acetonitrile, isopropyl alcohol and N,N-dimethylformamide. The half-neutralization potential values and the corresponding pKa values were determined for all cases. Thus, the effects of solvents and molecular structure upon acidity were investigated. In addition, N-acetyl derivatives of 3 type compounds were also obtained. The new synthesized compounds in the study were fully characterized.

scholarly journals In VirtoAntioxidant Activities of New 4,5-Dihydro-1H,2,4-triazol-5-ones having Thiophene Ring with their Acidic Properties

2011 ◽  
Vol 8 (4) ◽  
pp. 1734-1746 ◽  
Author(s):  
H. Yuksek ◽  
F. Islamoglu ◽  
O. Gursoy Kol ◽  
S. Bahceci ◽  
M. Bekar ◽  
...  
Keyword(s):  
Isopropyl Alcohol ◽  
Antioxidant Activities ◽  
Thiophene Ring ◽  
Butyl Alcohol ◽  
Dimethyl Formamide ◽  
Acidic Properties ◽  
Alkyl Aryl ◽  
Neutralization Potential ◽  
New Compounds ◽  
Derivatives Of

Seven new 3-alkyl(aryl)-4-(2-thienymethylenamino)-4,5-dihydro-1H-1,2,4-triazol-5-ones(2)were synthesized by the reactions of 3-alkyl(aryl)-4-amino-4,5-dihydro-1H-1,2,4-triazol-5-ones(1)with thiophene-2-carbaldehyde. In addition,N-acetyl derivatives of compounds2d-2gwere also prepared. The structures of eleven new compounds synthesized were determined by elemental analysis as well as IR, NMR and UV spectral data. In addition, compounds2a-gand3a,3b,3d-fwere also screened for their antioxidant activities and2a-gwere potentiometrically titrated with tetrabutylammonium hydroxide (TBAH) in four nonaqueous solvents (isopropyl alcohol,t-butyl alcohol, acetonitrile andN,N-dimethyl formamide). Also half-neutralization potential values and the corresponding pKa values were determined in all cases.

Alkyl, aryl, acyl, and hydride derivatives of phosphido-bridged WRe complexes. Crystal and molecular structure of [cyclic] (CO)5W(.mu.-PPh2)Re(CO)4

1985 ◽  
Vol 4 (1) ◽  
pp. 68-74 ◽  
Author(s):  
William C. Mercer ◽  
Robert R. Whittle ◽  
Eric W. Burkhardt ◽  
Gregory L. Geoffroy
Keyword(s):  
Molecular Structure ◽  
Crystal And Molecular Structure ◽  
Alkyl Aryl ◽  
Derivatives Of

Synthesis, characterisation and molecular structure of stannyl derivatives of molybdenum and iron

2006 ◽  
Vol 782 (2-3) ◽  
pp. 110-115 ◽  
Author(s):  
J.L. Neto ◽  
G.M. de Lima ◽  
A.O. Porto ◽  
J.D. Ardisson ◽  
A.C. Doriguetto ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Derivatives Of

ChemInform Abstract: An Efficient, Three-Component Synthesis and Molecular Structure of Derivatives of 2-Amino-3-R-6-ethyl-4,6-dihydropyrano[3,2-c] [2,1]benzothiazine-5,5-dioxide Spirocombined with a 2-Oxindole Nucleus.

ChemInform ◽  
2015 ◽  
Vol 46 (13) ◽  
pp. no-no
Author(s):  
Leonid A. Shemchuk ◽  
Dmitry A. Lega ◽  
Ruslan Gr. Redkin ◽  
Valentin P. Chernykh ◽  
Oleg V. Shishkin ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Derivatives Of
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