Britt E. Lindfors, Jonathan L. Male, Katharine J. Covert and David R. Tyler
The cage recombination efficiency of the [(η5-C5H4Me)(CO)3W ·, ·W(CO)3(η5-C5H4Me)] radical cage pair in hydrocarbon solvent systems is higher than that of the analogous, but less massive, [(η5-C5H4Me)(CO)3Mo ·, ·Mo(CO)3(η5-C5H4Me )] cage pair; the difference is shown to be attributable not to differences in the radical masses but to differences in the metal–metal bond energies or in the spin–orbit coupling.