the reaction mixture was stirred at 35 u00b0 c for an additional one hour the reaction mixture was then cooled and extracted with three 25 ml portions of methylene chloride analysis of the methylene chloride extract by gas chromatography indicated that no detectable products arising from the side chain chlorination are formed from the methylene chloride extract 16 9 g 118 3 mmoles of pure n propanesulfonyl chloride was isolated in the same manner as in example 1 60 g of 30 weight percent aqueous hydrogen peroxide 530 mmole was added with vigorous stirring using a mechanical stirrer to a mixture of 23 4 g of 1 octanethiol 160 mmole and 50 g of 36 5 weight percent aqueous hydrochloric acid 500 mmole over a period of two hours while the reaction temperature was increased from 25 u00b0 c to 50 u00b0 c the reaction mixture was stirred for an additional one hour at 50 u00b0 c the reaction mixture was then cooled and extracted with three 25 ml portions of methylene chloride analysis of the methylene chloride extract by gas chromatography indicated that no detectable products arising from the side chain chlorination are formed from the organic extract 14 7 g of pure 1 octanesulfonyl chloride was obtained in the same manner as described in example 1 there was added with vigorous stirring using a mechanical stirrer 62 3 g of 30 weight percent aqueous hydrogen peroxide 550 mmoles to a mixture of 9 4 g of dimethyldisulfide 100.