Diazocopulation des amines et des heterocycles azotes a l'aide du reactif hmbt

Pays, M.; Bourdon, R; Beljean, M.

doi:10.1016/s0003-2670(01)81809-2

Cited by 19 publications

(2 citation statements)

References 7 publications

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“…The probable reaction pathway is based on the reactivity of hydrazine group with aromatic amines (Hemantha Kumar et al 2002;Eugene et al 1961;Pays et al 1969) as described in Fig. 4.…”

Section: Reaction Mechanismmentioning

confidence: 99%

A spectrophotometric assay method for vanadium in biological and environmental samples using 2,4-dinitrophenylhydrazine with imipramine hydrochloride

Al-Tayar

Nagaraja

Vasantha³

et al. 2011

Environ Monit Assess

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A simple, rapid, and sensitive method involving the interaction of 2,4-dinitrophenylhydrazine with imipramine hydrochloride in presence of vanadium (V) in sulfuric acid medium has been proposed for the determination of vanadium. The purple-colored product developed showed an absorption maximum at 560 nm and was stable for 24 h. The working curve was linear over the concentration range of 0.1-2.8 μg ml( - 1), with sensitivity of detection of 0.0124 μg ml( - 1). Molar absorptivity and Sandell's sensitivity were found to be 2.6 × 10(4) l/mol cm and 0.0039 μg cm( - 1), respectively. The accuracy of the proposed method was assessed by Student's t test and variance ratio F test, and the results were on par with the reported method. The method was successfully used in the determination of V in water, human urine, soil, and plant samples, and it was free from interference by various concomitant ions.

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“…The probable reaction pathway is based on the reactivity of hydrazine group with aromatic amines (Hemantha Kumar et al 2002;Eugene et al 1961;Pays et al 1969) as described in Fig. 4.…”

Section: Reaction Mechanismmentioning

confidence: 99%

A spectrophotometric assay method for vanadium in biological and environmental samples using 2,4-dinitrophenylhydrazine with imipramine hydrochloride

Al-Tayar

Nagaraja

Vasantha³

et al. 2011

Environ Monit Assess

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“…Under the reaction conditions, MBTH loses 2eand a proton on oxidation with thallium(III) forming the electrophilic intermediate (active coupling species) which couples with IPH to give a blue colored product. The probable reaction pathway based on the reactivity of MBTH with aromatic amines [39][40][41] is shown in Scheme 1.…”

Section: Reaction Mechanismmentioning

confidence: 99%

Spectrophotometric Determination of the Trace Amount of Thallium in Water and Urine Samples by Novel Oxidative Coupling Reaction

Nagaraja

Al-Tayar

Shivakumar

et al. 2009

Journal of Chemistry

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A novel, simple, rapid, sensitive and selective method has been proposed for the trace determination of thallium by spectrophotometric detection. This method is based on the oxidation of MBTH (3-methyl-2-benzothiazolinone hydrazone hydrochloride) by thallium(III) to form diazonium cation, which couples with IPH (Imipramine hydrochloride) in phosphoric acid medium at room temperature giving a blue colored species having a maximum absorption at 635 nm. The reagents and manifold variables influences on the sensitivity were investigated and the optimum reaction conditions have been established. The calibration curve was found to be linear over the range 0.1-5 μg mL-1with the molar absorptivity and Sandell’s sensitivity of 2.9x104L mol-1cm-1, 0.0071 μg cm-2respectively. The tolerance limit of the method towards various ions usually associated with thallium has been detected. The relative standard deviation for five replicate determination of 2μg mL-1thallium was 0.47%. The method has been successfully applied for the determination of thallium(ІΙΙ) and thallium(I) in synthetic, standard reference materials, water and urine samples with satisfactory results. The performance of the proposed method was evaluated in terms of student’st-test and variance ratioF-test, to find out the significance of proposed method over the reported methods.

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Applications de la Résonance Dynamique du Proton et du Carbone‐13 à l'Etude d'Azines Hétérocycliques. Mécanismes de Formation et d'Isomérisation

1978

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Diazocopulation des amines et des heterocycles azotes a l'aide du reactif hmbt

Cited by 19 publications

References 7 publications

A spectrophotometric assay method for vanadium in biological and environmental samples using 2,4-dinitrophenylhydrazine with imipramine hydrochloride

A spectrophotometric assay method for vanadium in biological and environmental samples using 2,4-dinitrophenylhydrazine with imipramine hydrochloride

Spectrophotometric Determination of the Trace Amount of Thallium in Water and Urine Samples by Novel Oxidative Coupling Reaction

Applications de la Résonance Dynamique du Proton et du Carbone‐13 à l'Etude d'Azines Hétérocycliques. Mécanismes de Formation et d'Isomérisation

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