Abstract:
Single crystals of the di-n-hexyl sulfide-urea and diethyl s~lfide--~rea inclusion comi;>ounds were
x irradiated at 77°K and the long-lived free radicals produced were mvest1gated by electron spm resonance.
The free radicals observed in both crystals were of the type RCHSR'. The value for the spin density on
the carbon atom is 0.74±0.07 . The unpaired spin distribution is discussed in terms of simple molecularorbital
models.