Ethyl xanthogenate

The extent of the long-chain branching of a series of ethyl xanthogen disulfide modified polymers carried to increasing conversion is shown in Table 1. No branches are found until 56% conversion. The gel point is a Htfle over 82%. Polymer rheology deteriorates between 56 and 82% conversion. 

A three-necked, round-bottomed flask with Claisen head may be used instead. p-Chloroacetophenone (97%), hydroxylamine hydrochloride (purum p.a. >98%), potassium 0-ethyl xanthogenate (>98%), bromine (puriss. p.a., >99.5%), and hydrobromic add [puriss. 48% (w/w)] were obtained from Ruka Chemika and used as... 

Potassium 0-ethyl xanthate or Potassium 0-ethyl xanthogenate Carbonodithioic acid O-ethyl ester, potassium salt (8,9) (140-89-6)... 

Omeprazole was prepared [19] by reaction of 4-methoxy-o-phenyl-enediamine 1 with potassium ethyl xanthogenate 2 to give 5-methoxy-2-mercapto-lH-benzimidazole 3. Treatment of compound 3 with 3,5-dimethyl-4-methoxy-2-chloromethyl pyridine 4 in sodium hydroxide... 

Bis-(2-bromo-(l-bromomethyl-l-methyl)ethyl)pyridine 78 is a precursor for tetrapodal ligands. Its reaction with an excess of potassium 0-ethyl xanthogenate in DMSO at 70 °C (72 h) gave 2,6-bis-(3-methylthietan-3-yl)pyridine 79 (Equation 24) <2002ZN1256>. The yield of the product was not reported. 

OGEN DISULFIDE DITHIOBIS(THIOFORMIC ACID)-o,o-DIETHYL ESTER DIXANTHOGEN ETHYL XANTHOGEN DISULFIDE EXD K PREPARATION THIOPEROXYDICARBONIC ACID DIETHYL ESTER... 

Hydrosulfide end groups are usually introduced with potassium ethyl xanthogenate in acetone, thus substituting a bromide atom by a dithio carbonic acid. The latter is reductively cleaved by sodium borohydride in the presence of amines (Scheme 2.6). 

Most common is the theory of chemisorption of collectors at the surface of solid particles. However, it is, as a rule, at the same time noted that simultaneously concurrent processes take place, which are connected both with adsorption of surfactants at 1/g interfaces and with their interaction with ions in the flotation pulp. Thus, it is shown in [66] that saturated C 2—Cj4 fatty acids are selectively chemisorbed on calcium carbonate surfaces which provides them with an effective hydrophobisation. At the same time, C5—Cg acids are adsorbed mainly at 1/g interfaces which produces a substantial influence on the stability of the flotation foams. Free and Miller [67] have thoroughly investigated the behaviour of sodium oleate in the flotation of a calcium mineral, fluorite. It has been established that calcium dioleates are formed both in the bulk and at 1/s interfaces. In this case, an effective hydrophobisation of the surface of fluorite particles takes place both due to the interaction of oleate with calcium ions on the active sites and by adsorption of calcium dioleates formed in the solution. It has been once more confirmed [68] that classical collecting agents, xanthogenates, e.g. ethyl xanthogenate, form on the... 

Synonyms Carbonodithioic acid, 0-ethyl ester Dithiocarbonic acid, 0-ethyl ester Ethyixanthic acid Ethyl xanthogenate... 

Ethyl xanthogenate. See Ethyl xanthate Ethyl xanthogen disulfide. See Diethyl, xanthogen disulfide... 

Potassium 0-ethyl dithiocarbonate Potassium ethyl xanthogenate Potassium xanthate Potassium xanthogenate... 

Potassium ethyl xanthogenate. See Potassium ethyl xanthate... 

DNIC with cysteine DNIC with ethyl xanthogenate DNIC with thiosulfate... 

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