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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 20, Number 8
BKCSDE 20(8)
August 20, 1999 

Reactivity and Reaction Mechanism for Reactions of 1,1'-(Azodicarbonyl) dipiperidine with Triphenylphosphines
Dae Dong Sung, Mi Jeong Choi, Keun Moon Ha, Tae Seop Uhm
Reactivity and reaction mechanism for the reactions of 1,1'-(azodicarbonyl) dipiperidine with triphenylphosphines are investigated using kinetic method. The cation radical, Ph3P and the anion radical, -N-N - are produced during the course of the reaction. The cation radical is formed by the transfer of an electron from phosphorus to the nitrogen atom. The anion radical is formed by the addition of the one electron to the azo rad-ical. The rate constants are decreased by electron withdrawing groups while they are increased by electron donating groups present in triphenylphosphine. The electron density increases on nitrogen, while positive charge is developed on phosphorus in the transition state.
935 - 938
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