Novel Organic Ions of High-Spin States VI.: ESR Study on a Monocation of a Prototyoical High-Spin Molecular with a Weak Intramolecular Exchange Interaction, Biphenyl-3,3′-Diylbis (Phenylmethylene)

Autor:	Takamasa Momose, Takamasa Kinoshita, Koichi Itoh, Yoshio Teki, Tadamasa Shida, Toshihiro Nakamura, T. Takui
Rok vydání:	1997
Předmět:	Biphenyl chemistry.chemical_compound Spin states Chemistry Stereochemistry Intramolecular force Exchange interaction Photodissociation Physical chemistry Molecule Condensed Matter Physics Ground state Ion
Zdroj:	Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals. 306:439-446
ISSN:	1058-725X
DOI:	10.1080/10587259708044599
Popis:	A monocation of biphenyl-3,3′-diylbis(phenylmethylene) (BP-3,3′-BPM) was produced by γ-irradiation of biphenyl-3,3′-diylbis(phenyldiazomethane) (BP-3,3′-BPD) followed by denitrogenation by a visible light photolysis. ESR spectra at 77 K indicated the formation of a spin-quartet cation. However, the ground state of the cation was determined to be spin-doublet from the temperature dependence of the intensity of the quartet ESR signal. The doublet-quartet energy gap of the cation was estimated to be about 24 cm−1. The electronic state and the molecular structure of the cation were discussed by referring to a semiempirical calculation and by comparing with those of the anion.
Databáze:	OpenAIRE
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