As a team, consider the following historic preparation of a tris(1,1-dimethylethyl)
Chapter 14, Problem 77(choose chapter or problem)
As a team, consider the following historic preparation of a tris(1,1-dimethylethyl) derivative ofDewar benzene, B, by the photochemical isomerisation of 1,2,4-tris(1,1-dimethylethyl)benzene byvan Tamelen and Pappas (1962). B does not revert to A via either a thermal or a photochemicalelectrocyclic mechanism. Formulate a mechanism for the conversion of A to B and explain thekinetic robustness of B with respect to the regeneration of A.Dewar benzeneA B
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