The reactions of transition metal chelates with organometallic compounds and their paramagnetic products: IV—the anion radical of acetylacetonate

The anion radical of acetylacetonate is formed by the reaction of nickel (II) acetylacetonate with Grignard reagents. From the two coupling constants found in the e.s.r. spectrum, the one of 2·6 G was assigned to the methine proton and the one of 12·5 G to the six equivalent methyl protons of acetylacetonate. The calculations of spin densities for the anion radical of acetylacetonate by the INDO method are in relatively good agreement with experiment.