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Chemistry of Metal Benzylidene Picramates – benzylidene picramates of iron, cobalt and nickel

✍ Scribed by R. S. Srivastava; S. P. Agrawal; H. N. Bhargava

Publisher
John Wiley and Sons
Year
1977
Tongue
English
Weight
375 KB
Volume
2
Category
Article
ISSN
0721-3115

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✦ Synopsis

Abstract

Ferrous, cobalt and nickel benzylidene picramates have been prepared by treating the corresponding aqueous sulphate and chloride solutions with sodium salt of 4′‐dimethyIaminobenzylidene‐2‐hydroxy‐ 3.5‐dinitroaniline. A metal: ligand ratio of 1:2 has been established in all these cases with the help of micro‐analysis and confirmed by spectrophotometric, colorimetric and magnetic susceptibility measurements. I.R. studies of metal benzylidene picramates show N + M coordination, where M is iron, cobalt or nickel. Explosive properties of these benzylidene picramates have also been studied and it was found that the thermal stability of these benzylidene picramates increases as the atomic radius of the metal decreases. Ferrous, cobalt and nickel benzylidene picramates increased as the atomic radius of the metal decreases.

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✍ Dr. P. V. Kamat; Dr. M. G. Datar 📂 Article 📅 1973 🏛 John Wiley and Sons 🌐 English ⚖ 342 KB

## Abstract Metal‐ligand stability constants of complexes of substituted ortho‐hydroxyacetophenones and ortho‐hydroxypropiophenones with iron, cobalt and nickel were studied potentiometrically, at 27°C, at an ionic strength of μ∼0.1 M NaClO~4~, by CALVIN‐BJERRUM titration method. The stepwise stabi