Synthesis and characterization of mixed-ligand oxorhenium(V) complexes with new [(PNO/S)(S)] donor atom sets


Synthesis and characterization of mixed-ligand oxorhenium(V) complexes with new [(PNO/S)(S)] donor atom sets

Correia, J. D. G.; Domingos, A.; Santos, I.; Spies, H.

New oxorhenium complexes with 2(diphenylphosphanyl)-N-(1-thioethyl)benzamide (H2PNS) and 2-(diphenylphosphanyl)-N-(2-hydroxyethyl)bezamide (H2PNO) and various monodentate thiols as co-ligands are reported. These new complexes, 1-6, have been prepared by reacting [nBu4][Re(O)Cl4] or [Re(O)Cl3(PPh3)2] with the tridentate H2PNX (X=O, S) ligands and different monothiols. The characterization of the complexes involved IR. 1H and 31PNMR spectroscopy and x-ray crystallographic analysis in the case of 1 and 2. Complexes [Re(O)(kappa3-PNO)(SPh)] (1), and [Re(O)(kappa3-PNS)(SPh)] (2), adopt a distorted square pyramidal geometry (delta=3.0°, 1 and delta=1.3° for 2), with the oxo group in the axial position and the equatorial plane being defined by the phosphorus, nitrogen and oxygen (1) or sulfur (2) atoms of the tridentate chelate and by the sulfur atom of the monothiol.

  • J. Chem. Soc., Dalton Trans. (2001) 2245-2250

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Publ.-Id: 4092