Abstract: This is a contribution to the problem of stabilization of free organic radicals by resonance in general and to the recent discussion of" captodative" stabilization in particular. It has been found that substituent-dependent relative stabilities of 4, 4'-disubstituted triarylmethyl radicals 1 can be sensitively determined by ESR spectroscopic measurement of the equilibria of dissociation of the quinonoid dimers 2 in 21 cases. Most of the ...
![[1,1-Biphenyl]-4-methanol, .alpha.,.alpha.-diphenyl- Structure](https://image.chemsrc.com/caspic/138/38696-14-9.png)
