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.