Chapter 1

3-Methyl-2-Benzothiazolinone Hydrazone (MBTH)

INTRODUCTION

3-Methyl-2-benzothiazolinone hydrazone was first synthesised by Besthorn in 1910. Huning and Fritsch has described the oxidative coupling of this reagent with phernds, aromaticamines, heterocyclic-based compounds containing active methylenegroup to form highly coloured products in 1957. In 1961, Saltlicki et al. introduced MHTH into analytical chemistry.

STRUCTURE

 

3-Methyl benzothiazolinone hydrazone

 

3-Methyl benzothiazolinone hydrazone

MECHANISM OF ACTION

Under experimental conditions, MBTH loses two electrons and one proton on oxidation forming the electrophilic intermediate which is an active coupling spectres. ...

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