Related Experiment Video
Updated: Jun 28, 2026

Separation of Aldehydes and Reactive Ketones from Mixtures Using a Bisulfite Extraction Protocol
Published on: April 2, 2018
Determination of benzoyl bisulphide by desulphurisation and solvolysis
1Department of Chemistry, Sam Houston State College, Huntsville, Texas, U.S.A.
Abstract:
Benzoyl disulphide is rapidly and quantitatively desulphurised to the monosulphide by reaction with triphenylphosphine in aqueous methanol at 25 degrees . The monosulphide reacts with methanol to form thiobenzoic acid and methyl benzoate. Benzoyl disulphide also reacts with methanol in solutions containing ammonium acetate or sodium acetate yielding thiobenzoic acid, methyl benzoate and elemental sulphur. Benzoyl disulphide and sulphur were detected by their polarographic reduction waves. Thiobenzoic acid was detected by its polarographic oxidation wave and yields were determined by amperometric silver nitrate titrations.
More Related Videos
Related Concept Videos
Electrophilic Aromatic Substitution: Sulfonation of Benzene
Electrophilic Aromatic Substitution: Nitration of Benzene
Preparation and Reactions of Sulfides
Hydrolysis of Chlorobenzene to Phenol: Dow Process
Reduction of Benzene to Cyclohexane: Catalytic Hydrogenation
Preparation and Reactions of Thiols

