Ethylene as reactant

These reactions are made possible by the fact that hydrocarbons and related compounds having a benzylic or allylic hydrogen are carbon acids, having a pKa of about 35 to 37 they can donate a protcHi to a base and thus become carbanions. These carbanions can add to olefinic hydrocarbons. The steps involved in the catalytic chain reactions are illustrated by the following set of equations, using toluene and ethylene as reactants, and sodium as catalyst (5). 

Experiments of the type described above and illustrated in Figure 4 have been carried out for a series of zeolites which included H-ZSM-5, H-offretite, and their iron substituted analogs, using light alcohols, dimethyl ether, and ethylene as reactants. 

Diels-Alder reaction involves /i, j/2, V3 and ]/4 orbitals of 1, 3-butadiene andrt and71 orbitals of ethylene as reactants m.os andCj, CT2,7t, 7i, a3,04 orbitals of cyclohexene which are product molecular orbitals. When these molecular orbitals are arranged in the increasing order of their energies alongwith their symmetries, ground state molecular orbitals of reactants correlate with the ground state molecular orbitals of their product, therefore, reaction is thermally allowed but photochemically forbidden on account of the fact that first excited state of reactant does not correlates with first excited state of product (Fig. 5.6). 

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See also in sourсe #XX -- [ , ]

See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ , ]

See also in sourсe #XX -- [ , ]

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