ESR Spectrum of Electron Irradiated Cycloheptatriene. Cycloheptatrienyl Radical

Journal Article · Mon Oct 15 04:00:00 EDT 1962 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.1733387· OSTI ID:4757576

Arai, S.; Shida, S.; Yamaguchi, K.; Kuri, Z.

Electron spin resonance measurements on irradiated cycloheptatriene were made to obtain information on the cycloheptatrienyl radical formed. The spectrum of equally spaced eight lines was attributed to the hyperfine interaction of the seven equivalent protons, and it was concluded that the unpaired electron density on each carbon atom was one-seventy of an odd electron. It was concluded that cycloheptatrienyl radical may have a symmetric conjugated plane frame that is, the greatly increased resonance energy in the new frame is sufficiently large to overcome the strain required to flatten the ring. Q was found to be -27 G. It was also found that cycloheptatriene has the excited state with a definite lifetime, which is capable of the isomerization or collisional deactivation. (P.C.H.)

• Research Organization: Tokyo Inst. of Tech.
• Sponsoring Organization: USDOE
• NSA Number: NSA-17-004604
• OSTI ID: 4757576
• Journal Information: Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 8 Vol. 37; ISSN JCPSA6; ISSN 0021-9606
• Publisher: American Institute of Physics (AIP)
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALKENES
ATOMS
CARBON
CHEMISTRY
CYCLOALKENES
ELECTRONS
EXCITATION
FREE RADICALS
HEPTANE
HYPERFINE STRUCTURE
INTERACTIONS
IRRADIATION
ISOMERS
LIFETIME
MEASURED VALUES
PROTONS
RESONANCE
SPECTRA
SPIN