Addition of 1 equiv. of benzophenone to a solution of 2a in benzene and 6 hours exposure to LED light led to a distinctive signal in the X-band EPR spectrum (giso = 2.031) at 25 °C (Figure ). A similar EPR signal was observed from the reaction the analogous Zn-Zn bonded complex [Zn2{CH(CMeN-2,6-Me2C6H3)2}2] with benzophenone under the same photochemical conditions (Figure ). The short lifetime of the radical species, presumed to be a benzophenone radical anion coordinated to zinc, prevented its isolation and characterisation.