A new, water-soluble organoruthenium(II) sulfato Complex [Ru-II(SO4)(Bz boolean AND py)] {1, Bz boolean AND py = 2-(pentamethylbenzyl)pyridine} has been synthesized and is stable at pH from 2.0 to 8.0. This complex has a bidentate sulfato ligand as a leaving group arid is a good building block for "concerto catalysis": a new way of thinking in catalysis that bridges hetero- and homogeneous catalysis.