The H-abstraction from benzyl silicanes (3–6), alkoxy silicanes (7–18), phenyl alkoxy silicanes (19–22), and polybenzylsiloxane (23) by “magic blue” solution (in F113, CClF2-CCl2F) containing the H-abstracting agent [H(CF2)4]2NO· (1) and spin trap H(CF2)4 NO (2) was studied by EPR detection of the F, Si-nitroxides (a total of 24 from 21 silicon substrates) generated in the reactions. From the EPR spectra of the nitroxides, we have gained information about the position of H-abstraction, the subsequent radical steps after the H-abstraction, as well as the structures of the transient radical intermediates. This technique may serve as a new method for making multi-and polynitroxides under very mild conditions.
Research on Chemical Intermediates – Springer Journals
Published: Apr 14, 2009
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