2431-52-9Relevant academic research and scientific papers
INVESTIGATIONS IN THE FIELD OF UNSATURATED COMPOUNDS. XIII. ANOMALOUS CHLORINATION OF 1,2,4-TRICHLORO-2-BUTENE IN THE PRESENCE OF FERRIC CHLORIDE
Mkryan, G. M.,Kaplanyan, E. E.,Mkrtchyan, A. M.,Aivazyan, E. M.
, p. 236 - 239 (2007/10/02)
It was shown that the low-temperature (-5 to 25 deg C) chlorination of 1,2,4-trichloro-3-butene with chlorine in the presence of anhydrous ferric chloride and tert-butylpyrocatechol leads to the formation of an anomalous reaction product and an addition product .It was found that the composition of the products from the chlorination of 2,3,4-trichloro-1-butene is close to the composition of the products from the reaction of 1,2,4-trichloro-2-butene with chlorine.
Kinetics of Cl(2PJ) Reactions with the Chloroethanes CH3CH2Cl, CH3CHCl2, CH2ClCH2Cl and CH2ClCHCl2
Wine, P. H.,Semmes, D. H.
, p. 3572 - 3578 (2007/10/02)
The kinetics of the reactions Cl(2PJ) + RHCl -> RCl + HCl were investigated over the temperature range 257-426 K for RHCl = CH3CH2Cl (k2), CH3CHCl2 (k3), CH2ClCH2Cl (k4), and CH2ClCHCl2 (k5).Cl(2PJ) was produced by 355 nm pulsed laser photolysis of Cl2 and monitored by time-resolved resonance fluorescence spectroscopy.The data are adequately described by the following Arrhenius expressions (units are cm3 molecule-1 s-1, errors are 2? and refer to precision only): k2=(2.34+/-0.42)E-11exp, k3=(8.19+/-1.84)E-12exp,k4=(2.21+/-0.51)E-11exp, and k5=(4.88+/-1.41)E-12exp.Under some experimental conditions evidence for Cl(2PJ) regeneration via a secondary reaction was observed.At 258+/-1 K, deviations of Cl(2PJ) temporal profiles from first-order behavior were attributable to the reactions RCl + Cl2 -> RCl2 + Cl(2PJ)(kj).By modeling the observed C(2PJ) temporal profiles, we found the rate constant kj to lie in the range (5-12)E-14 cm3 molecule-1 s-1 for all RCl investigated.The reactivity trends observed in reactions of Cl2PJ) with C2HXCl(6-x), x=3-6, are discussed.
CHEMISTRY OF DIENES AND THEIR DERIVATIVES. XVII. LOW-TEMPERATURE CHLORINATION OF 2-CHLORO- AND 1,2-DICHLORO-1,3-BUTADIENES IN THE PRESENCE OF AN INHIBITOR OF RADICAL REACTIONS
Mkryan, G. M.,Airapetyan, R. Kh.,Mkryan, G. G.,Kaplanyan, E. E.
, p. 1242 - 1247 (2007/10/02)
During the chlorination of chloroprene (80-85percent conversion) in carbon tetrachloride at -5 to 0 deg C in the presence of tert-butylpyrocatechol 1,2-dichloro-1,3-butadiene, 3,3,4-trichloro-1-butene, 2,3,4-trichloro-1-butene, and 1,2,4-trichloro-2-butene are formed in percentage ratios of 20.4:6.7:3.4:69.5.During chlorination to total conversion of chloroprene under these conditions a series of other compounds are also formed as a result of the further chlorination of 1,2-dichloro-1,3-butadiene and 3,3,4-trichloro-1-butene.During the chlorination of 1,2-dichloro-1,3-butadiene to a high degree of conversion 1,2,4-trichloro-1,3-butadiene, 1,2,3,4-tetrachloro-1-butene, and 1,1,2,4-tetrachloro-2-butene are formed in ratios of 11.4:49:39.6.
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).
