Abstract
A range of radicals, CH2(Mu) HX (1) and XCH(Mu)CR2 (2), where X is a second-row substituent, have been studied by transverse-fieldμ +SR spectroscopy. The reduced muon—electron hyperfine coupling constants (A′Mu) for class (1) were all close to 37.3 G, the value for the parent radical CH2(Mu)CH2. However, for class (2)A′ Mu values are greatly reduced, as is the case for the corresponding hydrogen derivatives, XCH2CR2, relative to CH3CH2. Nevertheless, the reduction in coupling for Mu in (2] is appreciably less that that for1H in XCH2CR2 radicals, suggesting significant competition between Mu and X for the out-of-plane site. In addition to theμ + SR studies, the ESR spectra for the radicals (MeO)3SiCHCH3 and (MeO)3SiCH2CH2 have been measured for comparative purposes.
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Rhodest, C., Symons, M.C.R. Radicals containing β-muonium and α or β substituents:. Struct Chem 2, (233)441–(238)446 (1991). https://doi.org/10.1007/BF00672237
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DOI: https://doi.org/10.1007/BF00672237