The NMR spectrum of the triphenylmethyldimer taken in CH2Cl2 at− 22° is only compatible with the structure of Jacobson's dimer. Oxidation of solutions of triphenylmethyl and its dimer with SbCl5 leads after hydrolysis to different yields of 4-trityl-triphenylcarbinol as a function of reaction parameters. The formation of 4-trityl-triphenylcarbinol under the above conditions is taken as chemical evidence for the Jacobson structure of the triphenylmethyl dimer.
![1-[chloro-bis(4-phenylphenyl)methyl]-4-phenylbenzene Structure](https://image.chemsrc.com/caspic/140/64295-54-1.png)
![[1,1'-Biphenyl]-4-methanol,a,a-bis([1,1'-biphenyl]-4-yl)- Structure](https://image.chemsrc.com/caspic/312/5341-14-0.png)