Tetrahedron Letters p. 7675 - 7678 (1991)
Update date:2022-09-26
Topics:
Ramamurthy
Lei, Xue-Gong
Turro, Nicholas J.
Lewis, Thillairaj J.
Scheffer, John R.
Photolysis of macrocyclic mono- and diketones (1 and 2) included in X and Y zeolites gives Norrish type I products in addition to the products obtained via the Norrish type II process, the only observed process in isotropic media. Enhancement of the type I over the type II process is cationdependent and especially large enhancements are obtained with Li and Na as cations. The zeolite effect is attributed to a reduction in the rate of the Norrish type II α-hydrogen abstraction process.
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