Hydrocarbons, aromatic dehydrogenative couplings

Tertiary amines have also been employed in electron transfer reactions with a variety of different acceptors, including enones, aromatic hydrocarbons, cyanoaro-matics, and stilbene derivatives. These reactions also provide convincing evidence for the intermediacy of aminoalkyl radicals. For example, the photoinduced electron transfer reactions of aromatic hydrocarbons, viz. naphthalene, with tertiary amines result in the reduction of the hydrocarbon as well as reductive coupling [183, 184]. Vinyl-dialkylamines can be envisaged as the complementary dehydrogenation products their formation was confirmed by CIDNP experiments [185]. 

SiH-functional poly(silylated) aromatic hydrocarbons are important starting materials for the preparation of arene-bridged polysilanes through thermal or catalytic dehydrogenative coupling reactions. 

Once the paraffin and naphthenic hydrocarbons have been converted into reactive unsaturated hydrocarbons, many chemical reactions or processes are possible. Dehydrogenation may occur during decomposition [see Eqs. (19-9) to (19-12) and (19-15)]. In a general processing scheme dehydrogenation is usually coupled with or followed by other processes such as polymerization or alkylation. Reactions that have been termed cycUzaiion or aromatization may also be dehydrogenation reactions and may also involve decomposition, as indicated here ... 

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