Spectroscopic and analytical evaluation of 1-(di-(2-pyridyl) methylidene-5-(p-hydroxybenzilidene)-thiocarbohydrazone.

doi:10.1016/0022-2860(86)85314-5

Journal of Molecular Structure

Volume 143, March 1986, Pages 517-520

https://doi.org/10.1016/0022-2860(86)85314-5 Get rights and content

Abstract

The synthesis and some of the physico-chemical properties of 1-(di-(2-pyridyl) methylidene)-5-(p-hydroxybenzilidene)-thiocarbohydrazone have been studied. The behaviour against the metallic ions and its possibilities as analytical photometric reagent have been evaluated.

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Evaluation of two new asymmetric derivatives of thiocarbohydrazide as spectrophotometric analytical reagents
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The synthesis and analytical properties of 1-(2-pyridylmethylideneamino)-3-(4-hydroxybenzylideneamino)thiourea PHT and 1-(2-pyridylmethylideneamino)-3-(2,4-dihydroxybenzylideneamino)-thiourea PDT have been studied. A spectrophotometric method has been used to determine the protonation constants of the reagents and a spectrophotometric survey of the reactions of various cations with PHT and PDT has been made.
Spectrophotometric determination of gallium in alloys and fly-ash with pyridoxal derivatives of thiocarbohydrazide and carbohydrazide
1988, Talanta
The symmetric derivatives of pyridoxal with thiocarbohydrazide and carbohydrazide, and the asymmetric derivatives of pyridoxal and salicylaldehyde with the same hydrazides have been synthesized and their analytical potential for spectrophotometric and kinetic fluorimetric determination of metal ions was studied. Gallium(III) and PyMAU(1,3-bis{[4-(2-methyl-3-hydroxy-5-hydroxymethyl)pyridyl]methyleneaminourea at pH = 4.2 form a complex with a single absorption maximum at 425 nm, which can be extracted into cyclohexanone in the presence of a controlled amount of sodium perchlorate. The extract has maximum absorbance at 435 nm. Both systems can be used for determining gallium. The optimal range of gallium concentration for measurement in a 1-cm cell is 0.5–1.25 gmg/ml for the procedure in homogeneous medium (ϵ₄₂₅ = 3.76 × 10⁴.mole⁻¹.cm⁻¹) and 0.25–1.25 μg/ml for the extraction procedure (ϵ₄₃₅ = 5.30 × 10⁴ 1.mole⁻¹.cm⁻¹. The latter procedure has been applied to the determination of gallium in alloys and fly-ash.

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Spectroscopic and analytical evaluation of 1-(di-(2-pyridyl) methylidene-5-(p-hydroxybenzilidene)-thiocarbohydrazone.

Abstract

Anal. Quim.

Talanta

Talanta

Anal. Quim.