NMR studies of chiral P,S-chelate platinum, rhodium, and iridium complexes and the X-ray structure of a palladium(II) allyl derivative
Articolo
Data di Pubblicazione:
1997
Citazione:
NMR studies of chiral P,S-chelate platinum, rhodium, and iridium complexes and the X-ray structure of a palladium(II) allyl derivative / A. Albinati, J. Eckert, P. Pregosin, H. Ruegger, R. Salzmann, C. Stossel. - In: ORGANOMETALLICS. - ISSN 0276-7333. - 16:4(1997 Feb 18), pp. 579-590.
Abstract:
Several Rh(I), Ir(III), and Pt(II) complexes of the chiral P,S-bidentate ligand 2 have been prepared and characterized. Detailed two-dimensional NMR studies show that (i) the boat-type chelate ring and the stereogenic sulfur center can invert rapidly at ambient temperature and (ii) the sulfur donor may dissociate, essentially destroying the chiral pocket. The solid-state structure of [Pt(eta(3)-C3H5)(2)]PF6 (3) has been determined and the sulfur substituent shown to have an axial orientation. The six-membered chelate ring takes up a boatlike conformation. As shown by an X-ray diffraction study for 3, and via incoherent inelastic neutron scattering (IINS) measurements for the Pd analog, 4, the OH group is remote from the metal atom.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
nuclear-magnetic-resonance; asymmetric catalytic allylation; metal-complexes; ferrocenyl ligands; crystal-structures; alkylation; chemistry; mechanism; PD; hydroboration
Elenco autori:
A. Albinati, J. Eckert, P. Pregosin, H. Ruegger, R. Salzmann, C. Stossel
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