A trigold carbide cation stabilized as a labile pyridine adduct

Daugherty, Nicholas T.; Robilotto, Thomas J.; Bacsa, John; Gray, Thomas G.; Sadighi, Joseph P.

doi:10.1016/j.poly.2020.114464

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A trigold carbide cation stabilized as a labile pyridine adduct

Daugherty, Nicholas T.·Robilotto, Thomas J.·Bacsa, John·Gray, Thomas G.·Sadighi, Joseph P.

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Abstract

Auration of trimethylsilyldiazomethane by an (N-heterocyclic carbene)gold alkoxide affords a stable (silyldiazoalkyl)gold complex. The reaction of this species with a gold(I) fluoride, more efficient in the presence of an added gold cation equivalent, results in auration, desilylation, and N 2 loss. The putative trigold carbide cation was isolated as its pyridine adduct, a stable N-(triauromethyl)pyridinium ion. Reaction of the cationic pyridine adduct with carbon monoxide breaks the C—N bond, forming the stable trigold ketenylidene cation. Finally, DFT studies suggest substantial negative charge at the bridging carbon in the methylpyridinium analogue and in two possible intermediates, the trigold carbide cation and the pyridine adduct of a neutral digold carbide.

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY Carbide Carbon monoxide Chemistry Crystallography Diazoalkane Gold N-heterocyclic carbene

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Daugherty, Nicholas T., Robilotto, Thomas J., Bacsa, John, Gray, Thomas G., Sadighi, Joseph P.. 2020-02-24. A trigold carbide cation stabilized as a labile pyridine adduct. https://doi.org/10.1016/j.poly.2020.114464

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