NMR studies of chiral P,S-chelate platinum, rhodium, and iridium complexes and the x-ray structure of a palladium (II) allyl derivative

Alberto Albinati, Jürgen Eckert, Paul Pregosin, Heinz Rüegger, Renzo Salzmann, Corinna Stössel

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67 Scopus citations

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(η3-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.

Original languageEnglish
Pages (from-to)579-590
Number of pages12
JournalOrganometallics
Volume16
Issue number4
DOIs
StatePublished - 1997

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