Xanthate - Wikipedia
A xanthate is a salt or ester of a xanthic acid. The formula of the salt of xanthic acid is [R−O−CS2]−M+ (where R is organyl group and M is usually Na or K). [1] . Xanthate also refers to the anion [R−O−CS2]−.
Xanthate | Organic Chemistry, Reactions, Salts | Britannica
xanthate, any of a class of organic salts formed by treatment of an alcohol with carbon disulfide in the presence of an alkali. The term is derived from the Greek word xanthos, for “yellow,” in reference to the compound potassium ethyl xanthate (C 2 H 5 OCS 2 K), which gives a yellow precipitate when combined with copper sulfate .
II. Xanthates - Chemistry LibreTexts
2022年9月14日 · The most common method for synthesizing O - [ (alkylthio)thiocarbonyl] esters of carbohydrates (carbohydrate xanthates) begins by forming an alkoxide ion from reaction of sodium hydride with a compound containing an unprotected hydroxyl group. 1 (Imidazole usually is present in the reaction mixture to promote alkoxide ion formation.)
Xanthate - SpringerLink
2023年6月14日 · Xanthate is one of the most common flotation collectors. It can be used for flotation of various metal sulfide ores and nonsulfide ores such as oxide copper ore, oxide lead ore, and lead sulfate ore. Methyl xanthate has short carbon chain and poor hydrophobicity, without practical application value in flotation.
Xanthate - an overview | ScienceDirect Topics
Xanthate is a type of sulfide collector widely used in Earth and Planetary Sciences. It has a molecular formula ROCSSM and is stable under alkaline conditions but unstable in acidic solutions. Common xanthate collectors include ethyl …
Chugaev elimination - Wikipedia
With the addition of iodomethane, the alkoxide is transformed into a methyl xanthate. At about 200 °C, the alkene is formed by an intramolecular elimination. In a 6-membered cyclic transition state the hydrogen atom is removed from the carbon atom β to the xanthate oxygen in a syn …
Xanthate - an overview | ScienceDirect Topics
The xanthate method for the preparation of alkanethiols involves two stages: (i) synthesis of the alkyl xanthate and (ii) subsequent cleavage by base hydrolysis or reduction (Scheme 14). Alkyl xanthates are usually prepared by treatment of alkyl halide with potassium ethyl xanthate or similar alkali metal xanthate reagents.
Xanthate Definition & Meaning - Merriam-Webster
The meaning of XANTHATE is a salt or ester of any of various thio acids and especially C3H6OS2.
The Xanthate Route to Ketones: When the Radical Is Better than …
2018年6月22日 · We have found over the past years that the degenerative exchange of xanthates represents in many ways an ideal solution to this problem. It overcomes essentially all of the difficulties faced by other radical processes because of its unique ability to reversibly store reactive radicals in a dormant, nonreactive form.
Angewandte Chemie International Edition in English
1997年4月18日 · Known for nearly two centuries, yet hardly researched! The rich chemistry of xanthates leaves much to be discovered. Xanthates are cheap precursors to a great variety of radicals that can be efficiently captured in reactions free of heavy metals.