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Chlorine to conjugated dienes

Later on, product distribution studies15 of the ionic addition of chlorine to conjugated dienes, and in particular to cyclopentadiene, 1,3-cyclohexadiene, cis,cis-, trans,trans-and c ,fraws-2,4-hexadienes, and cis- and trans-1,3-pentadienes have supplied the first stereochemical data, showing that the stereochemistry of 1,4-addition is predominantly syn, although to an extent smaller than that of bromine addition. Moreover, the 1,2-addition is generally non stereoselective, except for the addition to the 3,4-bond of cis-and trans-1,3-pentadienes where the attack is 89-95% anti. Finally, appreciable amounts of cis- 1,2-dichlorides were obtained from the two cyclic dienes, whereas 2,4-hexadienes showed a preference for anti 1,2-addition, at least in the less polar solvents (carbon tetrachloride and pentane). On the basis of all these results the mechanism shown in equation 29 was proposed. [Pg.565]

FIGURE 12.38 Addition of bromine or chlorine to conjugated dienes gives two products. [Pg.536]


See also in sourсe #XX -- [ Pg.407 ]

See also in sourсe #XX -- [ Pg.407 ]

See also in sourсe #XX -- [ Pg.407 ]

See also in sourсe #XX -- [ Pg.382 ]




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1,3-Diene, conjugated

Conjugate 1,3 dienes

Conjugation Dienes, conjugated)

Dienes chlorination

Dienes conjugated

To dienes

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