Proton ENDOR of dimethylnitramine free radicals
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Electron nuclear double resonance (ENDOR) spectra of free radicals produced by ultraviolet (UV) photolysis of polycrystalline and single crystal dimethylnitramine (or N-methyl-N-nitromethanamine) [DMN; (CH3)2NNO2 were studied atca. −30°C. Results suggest that multiple radical species are formed during UV photolysis of DMN, perdeutero-DMN-d6, and15N-labeled DMN. Proton ENDOR spectra are consistent with assignment of a cation radical (CH3)2NNO 2 + as the major DMN radical species. Proton hyperfine coupling anisotropy, which is observed from the ENDOR spectra, is attributed to inequivalence of the two DMN methyl groups.
KeywordsHyperfine Coupling ENDOR Spectrum ENDOR Line Electron Nuclear Double Resonance Unpaired Spin Density
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- Photolysis of DMN was conducted at 77 K. EPR spectra of the DMN radical gave no indications of NO2+ radicals.Google Scholar
- Dimethylnitramine used in this experiment was originally purchased for K&K Laboratories which is now part of ICN Biomedicals, Inc.Google Scholar
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