Derivatization of Alcohols Using (bmim)HSO₄: A Green Approach for the Undergraduate Chemistry Laboratory

Sharda Mahilkar Sonkar^1, , Sujata Sengupta¹, Shivani Singh¹ and Anshika Lumb¹

¹Department of Chemistry, Miranda House, University of Delhi, Delhi, India

Cite this paper:
Sharda Mahilkar Sonkar, Sujata Sengupta, Shivani Singh and Anshika Lumb. Derivatization of Alcohols Using (bmim)HSO₄: A Green Approach for the Undergraduate Chemistry Laboratory. World Journal of Chemical Education. 2022; 10(2):62-64. doi: 10.12691/wjce-10-2-2

Abstract

Alcohol is one of the functional groups detected as part of qualitative organic analysis. The final identification of alcohol involves the preparation of suitable crystalline derivative, usually the 3,5-dinitrobenzoate. According to the standard procedure, 3,5-dinitrobenzoic acid is first converted to 3,5-dinitrobenzoyl chloride by reaction with either phosphorous pentachloride (PCl₅) or thionyl chloride (SOCl₂). However, in this reaction, hazardous side products like phosphorous oxychloride (POCl₃), hydrochloric acid (HCl) and sulphur dioxide (SO₂) are produced. In the present method, we report the direct and benign conversion of alcohols to the corresponding 3,5-dinitrobenzoates using ionic liquid, (bmim)HSO₄ under microwave irradiation.

Keywords:
alcohol qualitative organic analysis 3，5-dinitrobenzoate ionic liquid microwave

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