Ammonia Activation by a Nickel NCN-Pincer Complex featuring a Non-Innocent N-Heterocyclic Carbene: Ammine and Amido Complexes in Equilibrium
| Autor: | Javier Borau Garcia, Rudy M. Brown, Christopher J. Roberts, Heikki M. Tuononen, Juuso Valjus, Roland Roesler, Masood Parvez |
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| Rok vydání: | 2015 |
| Předmět: |
Coordination sphere
typpiligandit N-heterosykliset karbeenit ammoniakki Photochemistry ammonia Catalysis Amidine nikkelikomopleksi chemistry.chemical_compound Deprotonation Polymer chemistry pincer ligands N-heterocyclic carbenes ta116 bond activation Chemistry Ligand Transition metal carbene complex nickel complex General Chemistry General Medicine sidoksen aktivointi Oxidative addition Pincer movement Carbene |
| Zdroj: | Angewandte Chemie. 127:6372-6375 |
| ISSN: | 0044-8249 |
| Popis: | A Ni0-NCN pincer complex featuring a six-membered N-heterocyclic carbene (NHC) central platform and amidine pendant arms was synthesized by deprotonation of its NiII precursor. It retained chloride in the square-planar coordination sphere of nickel and was expected to be highly susceptible to oxidative addition reactions. The Ni0 complex rapidly activated ammonia at room temperature, in a ligand-assisted process where the carbene carbon atom played the unprecedented role of proton acceptor. For the first time, the coordinated (ammine) and activated (amido) species were observed together in solution, in a solvent-dependent equilibrium. A structural analysis of the Ni complexes provided insight into the highly unusual, non-innocent behavior of the NHC ligand. peerReviewed |
| Databáze: | OpenAIRE |
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