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Issue 33, 2019
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Rh(I) and Ru(II) phosphaamidine and phosphaguanidine (1,3-P,N) complexes and their activity for CO2 hydrogenation

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Abstract

Phosphaamidine metal complexes Rh2Cl2[Ph2PC(Ph)[double bond, length as m-dash]NPh]2μ-CO (1), RuCl2[Ph2PC(Ph)[double bond, length as m-dash]N(Ph)]2 (2), [Rh{iPr2PC(Ph)[double bond, length as m-dash]NiPr}(COD)]BF4 (3), and RuCl2[iPr2PC(Ph)[double bond, length as m-dash]NiPr](DMSO)2 (4) are prepared by combining phosphaamidines Ph2P-C(Ph)[double bond, length as m-dash]NPh and iPr2P-C(Ph)[double bond, length as m-dash]NiPr (1,3-P,N) with their corresponding metal ions. Complexes 1 and 2 are stable in air while 3 and 4 are stable under inert conditions. For further comparison of structure and stability, a Ru(II) phosphaguanidine complex, RuCl2[Me2NC(PPh2)[double bond, length as m-dash]NiPr](DMSO)2 (6) was prepared. Complex 6 is stable in air and in the presence of water. The structures of the phosphaamidine and phosphaguanidine complexes, determined using single crystal X-ray diffraction, revealed P,N bidentate coordination. While all five complexes have some activity as precatalysts, complex 6 was the most active.

Graphical abstract: Rh(i) and Ru(ii) phosphaamidine and phosphaguanidine (1,3-P,N) complexes and their activity for CO2 hydrogenation

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Publication details

The article was received on 08 Feb 2019, accepted on 22 Jul 2019 and first published on 22 Jul 2019


Article type: Paper
DOI: 10.1039/C9DT00602H
Dalton Trans., 2019,48, 12512-12521

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    Rh(I) and Ru(II) phosphaamidine and phosphaguanidine (1,3-P,N) complexes and their activity for CO2 hydrogenation

    R. Kandel, G. Schatte and P. G. Jessop, Dalton Trans., 2019, 48, 12512
    DOI: 10.1039/C9DT00602H

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