Novel Organic Ions of High-Spin States .4. ESR Studies on a Monoanion of a Prototype System Having 2 Carbenic Units Coupled by a Weak Intramolecular Exchange Interaction, Biphenyl-3,3’-bis(Phenylmethylene)

Nakamura T; Momose T; Shida T; Kinoshita T; Takui T; Teki Y; Itoh K

Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, Vol.278, 309-318, 1996

DOI10.1080/10587259608033689 Export Citation

Novel Organic Ions of High-Spin States .4. ESR Studies on a Monoanion of a Prototype System Having 2 Carbenic Units Coupled by a Weak Intramolecular Exchange Interaction, Biphenyl-3,3’-bis(Phenylmethylene)

Nakamura T, Momose T, Shida T, Kinoshita T, Takui T, Teki Y, Itoh K

The monoanion of biphenyl-3,3’-bis(phenylmethylene) (BP-3,3’-BPM) was produced and its electronic states were studied by ESR spectroscopy to conclude that the ground state is spin-doublet and that the first excited state is quartet lying above the ground state by 35cm(-1). The effective exchange interaction between the two carbenic units was analyzed in comparison with the interaction in the neutral parent BP-3,3’-BPM. The spin polarization of the pi-electrons dictates the spin alignment in the anion as in the case of the previously studied neutral BP-3,3’-BPM.

Keywords:ELECTRONIC GROUND-STATE;RESONANCE;HYDROCARBON;MOLECULES;NITROXIDE;H-1-ENDOR;SEPTET;MODEL