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Xanthate salts of alkali metals are produced by the treatment of an alcohol, alkali, and carbon disulfide.The process is called xanthation. [2] In chemical terminology, the alkali reacts with the alcohol to produce an alkoxide, which is the nucleophile that adds to the electrophilic carbon atom in CS 2. [3]
The intermediate is a xanthate. It is named for its discoverer, the Russian chemist Lev Aleksandrovich Chugaev (1873–1922), who first reported the reaction sequence in 1899. In the first step, a xanthate salt is formed out of the alkoxide and carbon disulfide (CS 2). With the addition of iodomethane, the alkoxide is transformed into a methyl ...
Sodium ethyl xanthate (SEX) [3] is an organosulfur compound with the chemical formula CH 3 CH 2 OCS 2 Na. It is a pale yellow powder, which is usually obtained as the dihydrate. Sodium ethyl xanthate is used in the mining industry as a flotation agent. [4] A closely related potassium ethyl xanthate (KEX) is obtained as the anhydrous salt.
Main RAFT equilibrium: This is the most important part in the RAFT process, [8] in which, by a process of rapid interchange, the present radicals (and hence opportunities for polymer chain growth) are "shared" among all species that have not yet undergone termination (P n • and S=C(Z)S-P n). Ideally the radicals are shared equally, causing ...
The Chugaev elimination is the pyrolysis of a xanthate ester, resulting in an olefin. [ 1 ] [ 13 ] To form the xanthate ester, an alcohol reacts with carbon disulfide in the presence of a base, resulting in a metal xanthate which is trapped with an alkylating agent (typically methyl iodide ).
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Potassium amyl xanthate (/pəˈtæsiəm ˌæmɪl ˈzænθeɪt/) is an organosulfur compound with the chemical formula CH 3 (CH 2) 4 OCS 2 K. It is a pale yellow powder with a pungent odor that is soluble in water. It is widely used in the mining industry for the separation of ores using the flotation process.