Weak intramolecular exchange interaction between two carbenic units in a novel organic high-spin ion. ESR studies on a monoanion of biphenyl-3,3′-diylbis(phenylmethylene)

Article abstract of DOI:10.1021/ja00150a029

A monoanion of biphenyl-3,3′-diylbis(phenylmethylene) (BP-3,3′-BPM) with a low-lying quintet and a triplet state near the singlet ground state was generated by γ-radiolysis followed by a subsequent visible light photolysis in a frozen solution of 2-methyl