| 16602796 |
Wajda-Hermanowicz K, Ciunik Z, Kochel A: Syntheses and molecular structure of some Rh and Ru complexes with the chelating diphenyl (2-pyridyl) phosphine ligand. Inorg Chem. 2006 Apr 17;45(8):3369-77.
The rhodium (III) complex mer,cis-[RhCl3 (PPh2py-P,N)(PPh2py-P)] (1) (PPh2py = diphenyl (2-pyridyl) phosphine) has been prepared from RhCl3 x 3H2O and PPh2py and converted to the trans,cis-[RhCl2 (PPh2py-P,N) 2] PF6 (2) in acetone solution by treatment with Ag+ and PF6 (-). Ruthenium (III) and ruthenium (II) compounds with PPh2py, mer,cis-[RuCl3 (PPh2py-P,N)(PPh2py-P)] (3) and mer-[RuCl (PPh2py-P,N) 2 (PPh2py-P)] Cl (5) have been obtained from DMSO precursor complexes. In a chloroform solution, complex (5) isomerizes to fac-[RuCl (PPh2py-P,N) 2 (PPh2py-P)] Cl (fac-5). All compounds have been characterized by MS, UV-vis, IR, and 1H and 31P{1H} NMR spectroscopy, and the Ru (III) compound has been characterized by EPR spectroscopy as well. The crystal structures of 1, 2, 3, and fac-5 have been determined. In all compounds under investigation, at least one pyridylphosphine acts as a chelate ligand. The 31P chemical shifts for chelating PPh2py-P,N depend on the Ru-P bond lengths. |
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