Crystallographic evidence for chromium-platinum interaction.

Heteronuclear Pt-Cr paddlewheel complexes with significant Pt-Cr interaction have been made. They can be interconverted. Upon oxidation, the Pt-Cr distance shortens significantly while other bond lengths remain unchanged. By taking into account the strong axial coordination from the chloride ligand in the oxidized compound, we suspect that the removed electron upon oxidation is probably from a Pt-Cr orbital that is significantly antibonding in nature.