Multiple Bonding Involving Late Transition Metals. The Case of a Silver-Oxo Complex

Area of Science:

• Inorganic Chemistry
• Theoretical Chemistry
• Computational Chemistry

Background:

• Experimental proposal of a novel silver-oxo complex.
• Need for theoretical validation of proposed complex structures and properties.
• Existing data on metal-oxo bond lengths in transition series.

Purpose of the Study:

• To computationally investigate putative silver-oxo species.
• To model an experimentally proposed silver-oxo complex.
• To perform statistical analysis of metal-oxo bond lengths across transition metals.

Main Methods:

• Ab initio calculations at various theoretical levels.
• Electronic structure calculations for silver-oxo species.
• Statistical analysis of experimentally determined and calculated metal-oxo bond lengths.

Main Results:

• Predicted a triplet ground state for cationic Ag(III)-oxo species, with singlet states at higher energies.
• Indicated that even the triplet state would be unstable due to low predicted bond energy.
• Highlighted that the experimental silver-oxo bond length (1.59 Å) is significantly shorter than calculated and estimated values for similar metal-oxo species.

Conclusions:

• The study casts doubt on the formulation of the reported complex as a diamagnetic Ag(III)-oxo species.
• Theoretical findings suggest the proposed silver-oxo species is unlikely to exist as described.
• Discrepancies in predicted ground state and bond length challenge the experimental interpretation.