Radiochemical determination of some unsaturates using mercuric acetate and methanol-14C
1968; Elsevier BV; Volume: 13; Issue: 4 Linguagem: Inglês
10.1016/0026-265x(68)90042-8
ISSN1095-9149
Autores Tópico(s)Polymer crystallization and properties
ResumoA radiochemical method sensitive to 1 μmole of double bond permits determination of terminal and cis-type olefinic unsaturation in many organic compounds without interfering reactions involving carboxyl, hydroxyl, carbonyl, or oxirane groups. Methoxy-14C-acetoxymercuri adducts of the double bond are formed in the presence of methanol-14C and mercuric acetate; excess methanol is volatilized, and residual activity in the derivative is assayed by wet combustion. The method is advantageous in that isolation of the adduct is not required and the combustion flask thus may serve as reaction vessel. The procedure has been used to measure unsaturation of the allyl ether and propenyl ether types in commercial poly (oxypropylene) glycols. The technique is useful for investigating the stoichiometry of the reaction of hydroxylated olefins with mercuric acetate in the presence of methanol. Double bonds located alpha-beta to aldehyde, ketone, carboxyl, and ester groups are in general not determined quantitatively.
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