Electron Spin Resonance in an Irradiated Single Crystal of Dimethylglyoxime

Journal Article · Thu Jan 01 04:00:00 EST 1959 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.1730244· OSTI ID:4253329

Miyagawa, Ichiro; Gordy, Walter

The paramagnetic resonance of gamma-irradiated single crystals of dimethylglyoxime has been measured at 23 kMc/sec and 9 kMc/sec for various orientations of the crystal in the magnetic field. The resonance pattern was found to have a triplet structure caused by coupling to a single N/sup 14/ nucleus. Both thc nuclear coupling and the spectroscopic splitting factor were found to be anisotropic with the principal values; A/sub 1/ = 45 plus or minus 1 gauss, A/sub 2/ = A/sub 3/ = 25 plus or minus 1 gauss, g/sub 1/ =2.0026 plus or minus 0.0003, g/sub 2/== 2.0063 plus or minus 0.0003, and g/sub 3/ = 2.0095 plus or minus 0.0003. It is concluded that the free radical produced by the irradiation is probably the ionized dimethylglyoxlme molecule with the positive charge and the electron spin density concentrated on one of the nitrogens and in an hybridized sp/sup 2/ orbital whieh is approximately in the molecular plane and along the bisector of the C = N - O angle. The s character in the orbital is calculated from the N/sup 14/ coupling to be 19%.

• Research Organization: Duke Univ., Durham, N.C.
• Sponsoring Organization: USDOE
• NSA Number: NSA-13-015088
• OSTI ID: 4253329
• Journal Information: Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 6 Vol. 30; ISSN JCPSA6; ISSN 0021-9606
• Publisher: American Institute of Physics (AIP)
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ATOMIC MODELS
CHEMICALS
CHEMISTRY
CONTAMINATION
CRYSTALS
DIMETHYLGLYOXIME
ELECTRONS
ENERGY LEVELS
FREE RADICALS
GAMMA RADIATION
IONIZATION
IRRADIATION
MAGNETIC FIELDS
MAGNETIC RESONANCE
MEASURED VALUES
METHYL RADICALS
MICROWAVES
MOLECULES
NITROGEN 14
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PRODUCTION
RADIATION EFFECTS
RESONANCE
SPECTRA
SPECTROSCOPY
SPIN
TABLES