87655-62-7Relevant academic research and scientific papers
Evidence for formation of a Co-H bond from (H2O) 2Co(dmgBF2)2 under H2: Application to radical cyclizations
Li, Gang,Han, Arthur,Pulling, Mary E.,Estes, Deven P.,Norton, Jack R.
, p. 14662 - 14665 (2012)
Under H2, the radical cyclization of appropriate dienes can be catalyzed by cobaloximes. H can be abstracted from an intermediate (presumably a cobalt hydride) by trityl radicals (Ar3C) or by TEMPO. The rate-determining step in these reactions is the uptake of H2, which is second order in cobalt and first order in hydrogen; the third-order rate constant is 106(3) M-2As-1.
Preparation and Characterization of Some Pentaarylethyls
Smith, William B.,Harris, Michael C.
, p. 4957 - 4962 (2007/10/02)
The reaction of triphenylmethylsodium with dichlorodiphenylmethane does not give pentaphenylethyl as previously reported, but when the anion reacts with 9,9-dichlorofluorene, it does form the reported 9-tritylfluorenyl radical which has been characterized by ESR spectroscopy.The radical is better prepared by oxidation of the anion of 9-tritylfluorene.The 9-tritylfluorenyl radical reacts with traces of oxygen to give triphenylmethyl and fluorenone.With light it forms triphenylmethyl and fluorenylidene.The latter was established by photolyzing 9-diazofluorene in the presence of triphenylmethyl with the generation of 9-tritylfluorenyl.Small yields of the persistent pentakis(p-tert-butylphenyl)ethyl radical have been prepared, and it is propable that pentaphenylethyl has also.
