Three radicals have been identified in the room temperature ESR spectra of xhyphen;irradiated single crystals of bgr;hyphen;alanine (N+H3CH2CH2COminus;2). ENDOR spectra from one radical exhibit hyperfine coupling to 1 agr;hyphen;proton (Axx=minus;33.12,Ayy=mdash;20.68,Azz=minus;10.50 G) and 2 bgr;hyphen;protons lsqb;Aiso(Hbgr;1) =13.24 G,Aiso(Hbgr;2) =4.89 Grsqb;. From the anisotropic nature of the agr;hyphen;proton coupling it has been determined that these splittings arise from a N+H3CH2Cdot;HCOminus;2radical. It has been shown that this radical is the decay product of the unstable low temperature oxidation product. A second room temperature radical, N+H3CH2CH2Cdot;=0, has been shown to be a decay product of the primary reduction product. A minor room temperature product has been tentatively identified as a Cdot;H2ndash;CH2ndash;R radical.
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