Collect. Czech. Chem. Commun. 1983, 48, 2525-2530

Anion radicals of beta diketonates

Andrej Staško, Ľubomír Malík, Peter Pelikán and Ján Reguli

Department of Physical Chemistry, Slovak Institute of Technology, 812 37 Bratislava


Formation of anion radicals [RCOCHCOR']- with R ≡ R' = Me, i-Pr, t-Bu, and with R = Me, R' = Ph has been observed in reactions of beta diketonates wih Grignard reagents. The splitting constant of the methine proton is 0.26 mT, and that of the methyl protons is 1.2 mT if R ≡ R' = Me. According to INDO calculations the anion radical is stabilized with Ni2+ counterion in tetrahedral arrangement.