A rhodium dinuclear complex having phenyltetramethyleyclopentadienyl (Cp-Ph=eta(5)-C5Me4Ph) and photosensitive dithionite (mu-O2SSO2) ligands, [((CpRh)-Rh-Ph)(2)(mu-CH2)(2) (mu-O2SSO2)] (1), has been synthesized. The crystal of complex 1 (monoclinic, C2/m (No. 12), a = 24.805(2) angstrom b = 29.111(2) angstrom, c = 10.8475(11) angstrom, beta = 105.9830(7)degrees, V = 7530.0(12) angstrom(3), Z = 8) consists of two independent molecules, 1-cis and 1-trans, with different arrangement of the Cp-Ph ligands. The flexibility, volume, and shape of the reaction cavities for the dithionite unit of 1-cis and 1-trans in the crystal are discussed.