Photocrystallographic structure determination of a new geometric isomer of [Ru(NH3)(4)(H2O)(eta(1)-OSO)][MeC6H4SO3](2)

The structure of a new metastable geometric isomer of [Ru(NH3)(4)(H2O)(SO2)][MeC6H4SO3](2) in which the SO2 group is coordinated through a single oxygen in an eta(1)-OSO bonding mode has been determined at 13 K; the new isomer was obtained as a 36% component of the structure within a single crystal upon irradiation using a tungsten lamp.