II. The Bromination of Butadiene The cis and trans forms of 1,4-dichloro-2-butene have been prepared, and their configurations proved by conversion to the respective 2-butenes. The 1,4-addition of chlorine to butadiene yields the trans isomer exclusively, under conditio... K Mislow,HM ...
For manufacturing trans-1,1,2,3,4,4-hexabromo-2-butene by the\nbromination of diacetylene, the diacetylene is first dissolved in residual\nhydrocarbons derived from acetylene manufacture in a solvent containing hydroxyl\ngroups. In a first desorption stage a mixture rich in vinylacetylene is\n...
Maleic acid (cis-2-butene-1, 4-dioic acid, Lide, 2004) and its corresponding methyl ester, dimethyl maleate (DMME) in which the alkene double bond is in conjugation with a carboxyl group, undergo isomerization on treatment with catalytic amounts of aqueous bromine or Br2/CCl4 under UV ...
Maleic acid (cis-2-butene-1, 4-dioic acid, Lide, 2004) and its corresponding methyl ester, dimethyl maleate (DMME) in which the alkene double bond is in conjugation with a carboxyl group, undergo isomerization on treatment with catalytic amounts of aqueous bromine or Br2/CCl4 under UV ...
1. A process for the production of trans 1,1,2,3,4,4-hexabromo-2-butene by bromination of diacetylene, characterised in that the diacetylene from the hydrocarbon residue arising in the acetylene recovery operation is dissolved at a temperature of -20 degrees C to + 20 degrees C and a ...