Muonium adds to allyl chloride, CH2=CHCH2Cl, to form two radicals: MuCH2CHCH2Cl (main product) and CH2CHMuCH2Cl (minor product). Both radicals were fully characterized byμSR andμLCR. In the main product, the LCR lines due to the35Cl and37Cl nuclei were observed. Also, the temperature dependence of various hyperfine coupling constants (hfc) indicates that both Mu and Cl eclipse the unpaired electronp 2-orbital in the minimum energy conformation. For the fragment-CH2Cl, the presence of Mu in theβ′-position is found to affect significantly the hfc of Cl in theβ-position; an internal rotational barrier of 12 kJ mol−1 was estimated using a simpleV 2 torsional potential.
