Supersonically cooled CrAr+ and Cr(N2)+ are photodissociated in the visible region. Diabatic dissociation thresholds are observed enabling the ground state binding energy to be determined as 0.61 +/- 0.04 and 0.29 +/- 0.04 eV for Cr(N2)+ and Cr(Ar)+, respectively. These data are compared with previously determined binding energies of first row transition-metal rare-gas diatomics.