34450-24-3Relevant academic research and scientific papers
UNSATURATED COMPOUNDS. XV. LIQUID-PHASE LOW-TEMPERATURE CHLORINATION OF 2-CHLORO- AND 2,3-DICHLORO-2-BUTENES IN THE PRESENCE OF FERRIC CHLORIDE
Kaplanyan, E. E.,Mkrtchyan, A. M.,Voskanyan, E. S.
, p. 41 - 43 (2007/10/02)
The effect of anhydrous ferric chloride on the degree of normal and anomalous chlorination of 2-chloro- and 2,3-dichloro-2-butenes at low temperatures (-20 to 0 deg C) in the presence of tert-butyl pyrocatechol was investigated.It was established that the addition of ferric chloride leads to a significant decrease in the amount of anomalous chlorination products.At the same time an increase is observed in the chlorination rate of trans-2,3-dichloro-2-butene. During the chlorination of 2,3-dichloro-2-butene under the influence of ferric chloride the anomalous chlorination product 2,3,3-trichloro-1-butene isomerizes to 1,2,3-trichloro-2-butene.
INVESTIGATION IN THE FIELD OF UNSATURATED COMPOUNDS. XII. BEHAVIOUR OF 2,3-DIHALOGENO-2-BUTENES DURING LIQUID-PHASE CHLORINATION IN THE PRESENCE OF AN INHIBITOR OF RADICAL REACTION
Kaplanyan, E. E.,Mkryan, G. G.,Adamyan, A. P.,Mkryan, G. M.
, p. 2014 - 2020 (2007/10/02)
Both normal addition products (tetrahalogenobutanes) and anomalous reaction products (2,3,3-trihalogeno-1-butenes) are formed during the liquid-phase chlorination of 2,3-dihalogeno-2-butenes (2,3-dichloro-, 2-chloro-3-bromo-, and 2,3-dibromo-2-butenes) in the presence of an inhibitor of radical reactions.Below 20 deg C the cis isomers are chlorinated more rapidly than the trans isomers, mainly forming the anomalous reaction products.During chlorination above 20 deg C (20-40 deg C) the process is complicated by the partial isomerization of the 2,3,3-trihalogeno-1-butene which forms into 1,2,3-trihalogeno-2-butene and, in the case of the bromine-substituted butenes, by substitution of the bromine atom by chloring.
INVESTIGATION IN THE FIELD OF UNSATURATED COMPOUNDS. V. ANOMALOUS CHLORINATION OF ETHYLENE COMPOUNDS CONTAINING A CHLORINE ATOM AT THE DOUBLE BOND
Mkryan, G. G.,Kaplanyan, E. E.,Mkryan, G. M.
, p. 1398 - 1402 (2007/10/02)
The liquid-phase chlorination of isomeric dichlorobutenes in a nonpolar medium was investigated in the presence of tert-butylpyrocatechol and without additions.The addition of tert-butylpyrocatechol leads to an increase in the yield of the products from anomalous chlorination and to a decrease in the yield of the products from normal addition.Increase in temperature during the chlorination of dichlorobutenes in the absence of tert-butylpyrocatechol promotes the formation of the normal addition products.It was suggested that the anomalous reaction, which leads to chlorides of the allyl and vinyl types, takes place by a molecular mechanism while the normal addition reaction takes place by both mechanism (molecular and radical).
