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A study of the reaction of alpha,beta-unsaturated carbonyl compounds with t
riethylborane under free radical conditions (Brown's reaction) including sp
ectroscopic analyses (B-11 NMR, IR, EPR) of products and intermediates indi
cated that these reactions involve the prior formation of an 'alpha,beta-un
saturated carbonyl compound-organoborane' complex. (C) 2000 Elsevier Scienc
e Ltd. All rights reserved.