Detection of thioureas, thiosemicarbazides and monothiosemicarbazones with 2,3-dichloro-1,4-naphthoquinone
- 1 January 1973
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in The Analyst
- Vol. 98 (1171) , 759-761
- https://doi.org/10.1039/an9739800759
Abstract
Thiosemicarbazones, thiosemicarbazides, thioureas and also isothiocyanates are made to react with 2,3-dichloro-1,4-naphthoquinone in an ethanolic medium and on rendering the mixtures alkaline with ethanolic ammonia solution, a red to violet colour is developed with absorption maxima between 500 and 570 nm. The reaction forms the basis of a spot test for these compounds.Keywords
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