in benzene byproducts: triphenylmethane, benzophenone; under N2; under exclusion of ambient light (wrapped in Al foil); Ph3C radical in benzene added to Re complex in benzene; stirred at ambient temp. for 1 wk; dried in vac.; washed with MeCN; ppt. collected by vac. filtration (Re2 complex); filtrate column chromd. (silica gel, CH2Cl2-hexanes 70:30, CH2Cl2); second band collected; solvent removed under reduced pressure; detd. by UV-vis and mass spectra;
