We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Synthesis, Structural Characterisation and Solution Behaviour of High-Symmetry Lanthanide Triflate Complexes with the Sterically Demanding Phosphine Oxides Cy<sub>3</sub>PO and tBu<sub>3</sub>PO.
- Authors
Coles, Simon J.; Pitak, Mateusz B.; Platt, Andrew W. G.
- Abstract
The synthesis and characterisation of complexes formed from lanthanide trifluoromethanesulfonates [Ln(OTf)3] and tricyclohexylphosphine oxide (Cy3PO) or tri-tert-butylphosphine oxide (tBu3PO) are described. The structures of [Ln(H2O)5(Cy3PO)2]·2R3PO·(OTf)3 (Ln = Pr, Tm; R = Cy and Ln = Nd; R = tBu) are pentagonal bipyramidal with an equatorial plane of five H2O ligands and two axial Cy3PO ligands. The remaining Cy3PO molecules are H-bonded to the coordinated water molecules, as are the triflate anions. NMR spectroscopy showed that the triflate ions remain associated with the com-plexes in CDCl3 solution. Lanthanide-induced shifts in the 19F and 31P NMR spectra confirm that one structure is present for all the lanthanides with an additional structure for the heavier metals. The acidity of the complexes was examined by 31P NMR spectroscopic studies on the reactions between [Ln(H2O)5- (Cy3PO)2]·2Cy3PO·(OTf)3 (Ln = La, Eu, Er, Lu) and phosphines PR3 (R = Ph, mesityl, Cy), Ph2PC2H4PPh2 and Ph2PC3H6PPh2. Protonation of the more basic phosphines and H-bonding to the less basic phosphines is observed.
- Subjects
RARE earth metal compound synthesis; TRIFLATE compounds; PHOSPHINE oxides; NUCLEAR magnetic resonance spectroscopy; BUTYL group; HYDROGEN bonding; SOLUTION (Chemistry)
- Publication
European Journal of Inorganic Chemistry, 2017, Vol 2017, Issue 11, p1464
- ISSN
1434-1948
- Publication type
Article
- DOI
10.1002/ejic.201601471