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Nitrosonium Reactivity of (NHC)Copper(I) Sulfide Complexes

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journal contribution
posted on 20.07.2019, 16:29 by Abraham J. Jordan, Rebecca K. Walde, Kelly M. Schultz, John Bacsa, Joseph P. Sadighi
This study examines the reactivity of a series of copper­(I) sulfide complexes stabilized by the expanded-ring N-heterocyclic carbene (NHC) 1,3-bis­(2,6-diisopropylphenyl)-4,5,6,7-tetrahydro-1,3-diazepin-2-ylidene (7Dipp) toward the nitrosonium ion (NO+). 7Dipp is shown to support neutral sulfide- and disulfide-bridged dicopper­(I) complexes, as well as mononuclear copper­(I) hydrosulfide. The addition of NO+ to each of these results in the formation of NHC-supported copper­(I) cations and elemental sulfur. Reduction of copper­(I) to copper(0) is observed upon reaction of NO+ with dicopper­(I) sulfide or disulfide, whereas ammonium ion formation is observed upon reaction of copper­(I) hydrosulfide with NO+. Ammonium ion formation is likewise observed upon reaction of NO+ with (7Dipp)­copper­(I) hydride.