Classical conjugate reactions discussion

Hitherto, we have only discussed Shilov s classic work in which using the example of conjugated oxidation reaction the general theory of conjugated processes was properly achieved. However, a series of subsequent works should be mentioned which developed investigations in the field of conjugated reactions. Without attempting a full treatment of the subject, let us concentrate on the most important results for scientific and applied purposes. 

The kinetics of consecutive, consecutive-parallel and parallel reactions of any complexity is discussed in classical monographs on chemical kinetics [1-3,11] and are not considered in the current monograph. The scope of kinetic regularities of these complex reactions mentioned will be minimally required for a clear understanding of their differences from kinetics of conjugated reactions. 

Treatment of the silyl compound, 61, above with hydrogen peroxide leads to the diol 62 which formally constitutes an oxidation as well as an electrophilic attack on the carbon atom. Classically, oxidation of nonconjugated rings to furnish their conjugated (usually aromatic) analogues is achieved by treatment with nickel(ii) peroxide however, these reactions are common and have been extensively explored for a number of different heterocyclic systems in both GHEC(1984) and CHEC-II(1996) so are not discussed further here. 

Besides the classical Schottky contact, various surface mechanisms are known to influence polymer metal contacts. Band bending in metal/PPV interfaces is also discussed in terms of surface states or chemical reactions between the semiconductor and the metal [70-74]. An excellent review on conjugated polymer surfaces and interfaces is given by [129]. 

In this section, we ll take a break from our survey of reaction mechanisms and focus instead on a class of intermediates, namely, carbanions. We will also discuss carbanion cognates such as enols, enolates, enamines, and ylides. As classic nucleophiles, carbanions react in highly characteristic ways, particularly via 8 2 displacements, as well as via other pathways (e.g., carbonyl addition and conjugate addition) we have discussed above. The material in this section will thus help you flesh out your understanding of what we have discussed so far. 

As discussed in Chapter 2 (Section 2.2), a classical acid-base reaction reacts an acid (A H) with a base (B ) to give a conjugate acid (B H) and a conjugate base (A ) as the products. This is an equilibrium reaction and the equilibrium... 

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