Ethylene dichloride Production schemes

The production of ethyl chloride from ethylene and hydrogen chloride, mainly for tetraethyl lead manufacture, is expected to fall rapidly. Ethylene dichloride (1,2-dichloroethane) and vinyl chloride (chloroethene) have already been discussed in section 12.3.3.2. These two materials are also starting points for the production of more highly chlorinated C2 products. The following scheme illustrates routes used for vinylidene dichloride (1,1-dichloroethene) and 1,1,1-trichloroethane (also known as methylchloroform in the U.S.A.) ... 

Although the iron 77 -alkene interaction is the key to many of these catalytic reactions, discrete organometallic complexes have not been isolated in most cases. Thus, for example, the activation of the complexes (2,6-bis(aryl-imino)pyridyl)iron dichloride with MAO (methylaluminoxane) yields an ethylene oligomerization catalyst which is likely to involve an intermediate t7 -C2H4 iron species such as 17 (Scheme 17). The iron catalysts of this type yield a-olefms with a Schulz-Flory distribution as well as linear homopolymers. This is the first time that the simultaneous production of both products has been reported.Iron-alkene intermediates are also important in addition reactions. Thus, the reactions of some aminocarbene iron complexes with electron-deficient alkenes lead to 1,4-dicarbonyl compounds via iron-alkene intermediates as shown in Scheme 18. 

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