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Dispersion-Driven Hydrogen Bonding: Predicted Hydrogen Bond between Water and Platinum(II) Identified by Neutron Diffraction


  • We thank Dr. Peter Reinhardt for technical assistance and helpful discussions. We acknowledge a generous gift of K2PtCl4 from W. C. Heraeus GmbH and financial support from the Hubert-Curien program “Galileo”, from COST (Action D39/0004/06), and from MIUR (PRIN 2007).


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An alternative to classical? In square-planar d8 complexes the metal ion can interact with axial H2O molecules either as a Lewis acid or as a Lewis base. Ab initio calculations predicted that uncharged PtII complexes form a hydrogen-bond-like interaction with H2O, in which PtII acts as a Lewis base. Such a nonclassical O[BOND]H⋅⋅⋅Pt hydrogen bond has now been identified in crystals of trans-[PtCl2(NH3)(N-glycine)]⋅H2O by neutron diffraction.

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