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Trans- l,4-Dichloro-2-butene

Cm.OROCARBONSANDCm.OROHYDROCARBONS - Cm OROPRENE] (Vol6) trans-l,4-Dichloro-2-butene... [Pg.303]

Chemical Designations - Synonyms 1,4-Dichloro-2-butene 2-Butylene Dichloride 1,4-Dichloro-2-butylene cis-l,4-Dichloro-2-butene trans-l,4-Dichloro-2-butene Chemical Formula C1CHjCH=CHCH2C1. [Pg.115]

Hydrochlorination of 1,3-Butadiene. A historic process for the synthesis of adi-ponitrile was the transformation of 1,3-butadiene through 1,4-dichlorobutene.187 Addition of HC1 was carried out in the vapor phase (125-230° C) in an excess of 1,3-butadiene. A mixture of isomeric dichlorobutenes (3,4-dichloro-l-butene, cis-and trans-l,4-dichloro-2-butene) was formed. They underwent further transformations to form the dicyanides and then, after hydrogenation, to give adiponitrile. [Pg.301]

Bromochlorination of olefins such as 1-hexene, ethylene, 3,4-dichloro-l-butene, trans-l,4-dichloro-2-butene and 3-chloro- and 3-bromo-propene has been accomplished using... [Pg.1157]

For the liquid product, the composition at thermodynamic equilibrium of the mixture of dichlorobutenes resulting from the previous step is favorable to the presence of the 1,4-isomers. At 100 C, in fact, and at Qtl. 10 Pa absolute, the following distribution is obtained (molar per cent) 3,4- dichloro 1-butene 21, d -i,4-dichloFo 2-butenes 7, and trans-l,4-dichloro 2-butenes s 72. However, these three components have (Efferent boiling points, 123,154 and 158 C respectively at atmospheiic pressure. Thm the vapor in equilibrium with the liquid is for richer in 3,4niicUoro 1-butene (52 per oentX n chloroprene precursor. This feature facilitates the shift of the reaction in the desired direction and allows the removal of the more volatile 3,4-isomer by assodated distiDation. [Pg.375]

Ma.nufa.cture. Butenediol is manufactured by partial hydrogenation of butynediol. Although suitable conditions can lead to either cis or trans isomers (111), the commercial product contains almost exclusively iVj -2-butene-l,4-diol Trans isomer, available at one time by hydrolysis of l,4-dichloro-2-butene, is unsuitable for the major uses of butenediol involving Diels-Alder reactions. The Hquid-phase heat of hydrogenation of butynediol to butenediol is 156 kj/mol (37.28 kcal/mol) (112). [Pg.107]

Another example is the vapor-phase chlorination of butadiene, which gives a mixture of dichlorobutenes of which 3,4-dichloro-l-butene (12) is the only desired isomer for the chloroprene synthesis [23, 24] (cf. eq. (14)). It is easily boiled off from the cis/trans 1,4-dichloro-2-butenes (123 vs. 155 °C). The migratory isomerization of residual 1,4-isomers 11 is effected by Cu complexes and seems to operate through -olefin/ -allyl intermediates. The chloride probably migrates via the copper center, but no mechanistic details are available. [Pg.1125]

The reaction of 2,3-dimethyl-l,3-butadiene with an equimolar amount of chlorine in carbon tetrachloride at — 20 °C has instead been reported593 to give mainly trans-1,4-dichloro-2,3-dimethyl-2-butene and 2-chloromethyl-3-methyl-l,3-butadiene, arising from the loss of one of the acidic hydrogen atoms in the ionic intermediate (equation 28). [Pg.565]

For trans-2,3-butene oxide and trans-l,4-dichloro-23-butere oxide, in order to understand the formation of disyndtotactic polymers, it is sufficient to assume a stereoselective process, i. e. that the active species selects a moncmia with a stereochemistry resembling its own Two different notattons are used in (xrder to conform with original papers... [Pg.72]


See other pages where Trans- l,4-Dichloro-2-butene is mentioned: [Pg.179]    [Pg.23]    [Pg.1114]    [Pg.179]    [Pg.23]    [Pg.1114]    [Pg.172]    [Pg.179]    [Pg.261]    [Pg.261]    [Pg.72]    [Pg.172]    [Pg.67]    [Pg.110]    [Pg.70]    [Pg.497]    [Pg.230]    [Pg.54]    [Pg.58]    [Pg.43]    [Pg.172]    [Pg.91]    [Pg.156]    [Pg.174]   
See also in sourсe #XX -- [ Pg.115 ]

See also in sourсe #XX -- [ Pg.115 ]




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1.2- dichloro trans

1.3- Dichloro-2-butene

1.4- DICHLORO-trans-2-BUTENE

L,3-Dichloro-2-butene

Trans-2-butene

Trans-l-

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