ChemInform Abstract: SUBSTITUTIVE AZO COUPLING OF 1-MONO- AND 1,3-DISUBSTITUTED 4,6,8-TRIMETHYLAZULENES WITH M-NITROPHENYLDIAZONIUM CATION IN AN ACID MEDIUM

1980 ◽  
Vol 11 (44) ◽  
Author(s):  
YU. N. PORSHNEV ◽  
V. I. ERIKHOV ◽  
M. I. CHERKASHIN
Keyword(s):  
Acid Medium ◽  
Azo Coupling

Oxidation mechanism of carcinogenic bis-azo dyestuff Trypan Blue

1982 ◽  
Vol 47 (10) ◽  
pp. 2746-2748 ◽  
Author(s):  
Miroslav Matrka ◽  
Jana Pípalová
Keyword(s):  
Acid Medium ◽  
Quantitative Evaluation ◽  
Oxidation Product ◽  
Trypan Blue ◽  
Oxidation Mechanism ◽  
Azo Coupling ◽  
Arenediazonium Salt

Oxidation of Trypan Blue with cerium(IV) ion in acid medium gives arenediazonium cation similar to the oxidation product of N,N-dimethyl-4-aminoazobenzene. Quantitative evaluation of the arenediazonium salt formed has been carried out spectrophotometrically after previous C-azo coupling with 2-naphthol.

Reactions of some 2-(6-azauracil-5-yl)phenylhydrazones

1979 ◽  
Vol 44 (8) ◽  
pp. 2438-2442 ◽  
Author(s):  
Jan Slouka
Keyword(s):  
Carboxylic Acid ◽  
Acid Medium ◽  
Alkaline Medium ◽  
Acidic Medium ◽  
Diazonium Salt ◽  
Azo Coupling

Azo coupling of the diazotized 6-(2-aminophenyl)-2,3,4,5-tetrahydro-1,2,4-triazine-3,5-dione with ethyl cyanoacetylcarbamate and diethyl malonyl-bis-carbamate has been used for preparation of the hydrazones I and II. The latter substances have been boiled in strongly acidic medium to give 2,3,4,6-tetrahydro-1,2,4-triazino[5,6-c]cinnoline-3-one (III) which has also been obtained by reduction of the mentioned diazonium salt with alkali sulphite and sebsequent cyclization of the formed hydrazine sulphonate by boiling in acid medium. In alkaline medium the hydrazones I and II have been cyclized to the nitrile IV and to 2-[2-(3,5-dioxo-2,3,4,5-tetrahydro-1,2,4-triazin-6-yl)-phenyl]-3,5-dioxo-2,3,4,5-tetrahydro-1,2,4-triazine-6-carboxylic acid (V), respectively.

Kinetics and Mechanism of Oxidation of Paracetamol by Thallic Perchlorate in Acid Medium

2015 ◽  
Vol 4 (3) ◽  
pp. 302-309 ◽  
Author(s):  
Deepmala Pareek ◽  
Riya Sailani ◽  
Vinita Gupta ◽  
Chandra Khandelwal ◽  
Prem Sharma
Keyword(s):  
Acid Medium ◽  
Kinetics And Mechanism ◽  
Mechanism Of Oxidation

CORROSION INHIBITION OF ZINC IN HYDROCHLORIC ACID MEDIUM USING UREA INHIBITOR

2007 ◽  
Vol 10 (2) ◽  
pp. 31-38 ◽  
Author(s):  
Khulood AL-Saadie ◽  
◽  
Nadia Abdul Karime ◽  
Israa M Al-Mousawi ◽  
◽  
...  
Keyword(s):  
Hydrochloric Acid ◽  
Acid Medium ◽  
Corrosion Inhibition ◽  
Hydrochloric Acid Medium
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