Di- and Triazaphospholes as Ligands for Ruthenium(II) and Iridium(III) Complexes

Ingo-Peter Lorenz (1) , Brigitte Koehler (2)

1 Chemie & Biochemie
2 Chemie & Biochemie

The reaction of the azaphospholes 5-methyl-2-phenyl-1,2,3-diazaphospole (PDAP) and 2-methyl-2-phenyl-1,2,4,3-triazaphospole (PTAP) with the dimers [LMCl2]2 (LM = 6-C6Me6Ru, 5-C5Me5Ir) of ruthenium(II) and iridium(III) only occurs in presence of nucleophiles such as EtOH or H2O leading to their metal-coordination after cleavage of the dimers. [(6-C6Me6)RuCl2]2 reacts with PDAP and EtOH in the molar ratio 0.5:1:1 to give the P-coordinated complex (6-C6Me6)RuCl2(P-PDAP*EtOH) (1). In case of [(5-C5Me5)IrCl2]2 the triazaphosphole PTAP was used in the presence of EtOH or H2O yielding the analogous products (5-C5Me5)IrCl2(P-PTAP*EtOH) (2) or (5-C5Me5)IrCl2(P-PTAP*H2O) (3). In 1-3 the former aromatic azaphosphole (σ2, λ3-P ) has been converted by 1,2 addition of EtOH or H2O to their P=C or P=N double bond with the nucleophiles EtO- and OH- bonded to phosphorus (σ3, λ3-P). Complexes 1-3 with the piano-stool configuration were characterized by elemental analysis, 31P NMR spectroscopy and single crystal X-ray diffraction.

Mots clés: Physical Sciences

Ingo-Peter Lorenz, Brigitte Koehler. Di- and Triazaphospholes as Ligands for Ruthenium(II) and Iridium(III) Complexes. Journal of Inorganic and General Chemistry / Zeitschrift für anorganische und allgemeine Chemie, 2009, 635 (9-10), pp.1362. ⟨10.1002/zaac.200900240⟩. ⟨hal-00495064⟩