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Monomeric nickel hydroxide stabilized by a sterically demanding phosphorus–nitrogen PN3P-pincer ligand: synthesis, reactivity and catalysis

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Abstract

A terminal nickel hydroxide complex (PN3P)Ni(OH) (3) bearing the 2nd generation phosphorus–nitrogen PN3P-pincer ligand has been synthesized and structurally characterized. As a nucleophile, 3 reacts with CO to afford the hydroxycarbonyl complex 4, (PN3P)Ni(COOH). 3 can also activate CO2 and CS2 to produce nickel bicarbonate (PN3P)Ni(OCOOH) (5) and bimetallic dithiocarbonate [(PN3P)NiS]2CO (6) respectively, as well as to promote aryl isocyanate and isothiocyanate insertion into the Ni–OH bond to give the corresponding (PN3P)NiEC(O)NHAr complexes (E = O, 7; E = S, 8). In addition, 3 catalyzes the nitrile hydration to various amides with well-defined intermediates (PN3P)Ni–NHC(O)R (R = Me, 9; R = Ph, 10).

Graphical abstract: Monomeric nickel hydroxide stabilized by a sterically demanding phosphorus–nitrogen PN3P-pincer ligand: synthesis, reactivity and catalysis

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Publication details

The article was received on 20 Aug 2018, accepted on 18 Sep 2018 and first published on 18 Sep 2018


Article type: Paper
DOI: 10.1039/C8DT03403F
Citation: Dalton Trans., 2018, Advance Article
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    Monomeric nickel hydroxide stabilized by a sterically demanding phosphorus–nitrogen PN3P-pincer ligand: synthesis, reactivity and catalysis

    C. Yao, P. Chakraborty, E. Aresu, H. Li, C. Guan, C. Zhou, L. Liang and K. Huang, Dalton Trans., 2018, Advance Article , DOI: 10.1039/C8DT03403F

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