Molecular rearrangement processes

Reaction of 8-aminoquinoline 567 with 3,4-dichlorodithiazolium chloride gave the quinolyl iminodithiazole 568 whose thermal rearrangement gave 569 via a molecular rearrangement process (96MI2775) (Scheme 95). 

In some cases, a fourth category can be added and includes processes such as the reforming (molecular rearrangement ) processes. For the purposes of this text, reforming (etc.) processes are included in the finishing processes because that is precisely what they are. Processes designed to finish various refinery streams and render them ready for sale. 

R. Wallace, Chem. Phys., 37, 285 (1979). Vibronic State Symmetry, Selection Rules and Transition Probabilities for a Molecular Rearrangement Process. The Butadiene-Cyclobutene Rearrangement. 

The reduction scheme sketched by Haber for the reduction of nitrobenzene also holds true for the substitution products of nitrobenzene in so far as the formation of their reduction phases can be coordinated to the same reduction, condensation, or molecular rearrangement processes. But the decisive influ-... 

TABLE 2-VI Time Required for Various Molecular Rearrangement Processes... 

We are actively pursuing all possible mechanistic alternatives for these unusual reactions. The difficulty of finding model reactions for these molecular rearrangement processes is that certain fundamental reactions of the substrates have not yet been discovered. Although a successful rearrangement reaction in a model system is not now available, we have experimental data which seem to direct us toward our aim of mimicking... 

The strategy devised in order to obtain the photoinduced shuttling movement of R between the two stations Ai + and A2 + is based on a four stroke synchronized sequence of electron transfer and molecular rearrangement processes, as illustrated in Figure 27(b).Light excitation of the photoactive unit P + (process 1) is followed by the transfer of an electron from this unit to Ai + (process 2) which competes with the intrinsic decay of the P + excited state (process 3). After the reduction of Ai +, with the consequent deactivation of this station, the ring moves (process 4) by 1.3 nm to encircle A2 +, a step that is in competition with the back electron transfer from Ai+ (still encircled by R) to the oxidized unit P + (process 5). Eventually, a back electron transfer from the free reduced station Ai + to the oxidized unit P + (process 6) restores the electron-acceptor power to this radical cationic station. As... 

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