Nickel (I) paramagnetic complexes stabilized by norbornadiene

Abstract

During the reaction between the norbornadiene and bis-η3 -allyl nickel complexes Niall2 (all-C3H5, 1-CH3C3H4, 2-CH3C3H4) ESR method detected the presence of a paramagnetic nickel (I). The concentration is about 10-4—10-6 of the concentration of nickel imposed into the system. Dependence of paramagnetic particles concentration vs. temperature was detected. Based on the findings the structures of the complexes of nickel (I) are discussed, as well as possible ways of their formation.