Accession Number : AD0712271

Title :   THE CLEAVAGE OF AROMATIC METHYLETHERS BY NEUTRAL SULPHITE,

Corporate Author : SVENSKA TRAFORSKNINGSINSTITUTET STOCKHOLM

Personal Author(s) : Gierer,Josef ; Koutek,Bohumir

Report Date : 04 OCT 1968

Pagination or Media Count : 11

Abstract : The splitting of aromatic methylether linkages by neutral sulphite was found to be an SN2 displacement on the methyl carbon atom, the rate depending on the concentrations of the methylether and the sulphite (and hydrosulphite) ions. The energy of activation was found to be 18.6 kcal per mole and the Hammett reaction constant +1.24. This sulphitolytic reaction is compared with other nucleophilic demethylation reactions of technical importance, such as the cleavage of methylether bonds by hydrosulphide and mercaptide ions (sulphate pulping) and the alkaline hydrolysis of methoxyl groups (alkaline pulping). A method for the gas chromatographic determination of methane sulphonic acid (as methylester) has been developed. (Author)

Descriptors :   (*ETHERS, *DECOMPOSITION), (*SULFITES, CHEMICAL REACTIONS), WOOD PULP, REACTION KINETICS, SWEDEN

Subject Categories : Organic Chemistry
      Wood, Paper and Related Forestry Products

Distribution Statement : APPROVED FOR PUBLIC RELEASE