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α,β-(Phosphino)(aminocarbene) and α,ω-(phosphino)(oxyaminocarbene): new bidentate ligands for transition metal complexes

Nathalie Merceron-Saffon - No affiliation found

2004/04/15 Full-length article DOI: 10.1016/j.jorganchem.2004.02.002 Journal: Journal of Organometallic Chemistry

Abstract:

AbstractDirect complexation of (amino)(phosphino)carbene 1a and (amino)(oxy)carbene 1b featuring a phosphino group in position-6 to the carbene with [Rh(CO)2Cl]2 has been studied. With the 1,2-bidentate ligand 1a, an original cationic complex 2 featuring two (amino)(phosphino)carbenes η2-bonded to the metal has been isolated in 79% yield. In the case of the 1,6-bidentate ligand 1b, a rhodium(I) complex 3 in which the carbene is in trans position relative to the CO ligand was obtained in 85% yield. Both compounds were fully characterized including X-ray diffraction studies.