Specific rovibrational levels of the E0(g)(+) ion-pair state of Cl-2 have been laser excited by optical-optical double resonance (OODR) via the B0(u)(+) state. A two-color, single-laser visible+ultraviolet (VIS + UV) scheme was used, where the UV radiation was derived by second-harmonic generation from the VIS laser output. Spectrally resolved emission at 240-265 nm was observed. The E0(g)(+) --> BOu+ spectra exhibited both discrete and continuous (Condon oscillation) parts, from which the E --> B electronic transition moment curve M-e(R) was derived. It is compared with corresponding results on ion-pair states of I-2.