New dinuclear and heterotrinuclear complexes containing the M2(μ-az)(μ-PPh2) core (M = Rh or Ir; az = azolate)

Article abstract of DOI:10.1016/0022-328X(95)05839-H

The heterobridged dinuclear complexes [M₂(μ-Pz)(μ-PPh₂) (COD₂)] (M = Rh; Pz= pyrazolate (pz) (1) or 3,5-dimethylpyrazolate (dmpz) (2) (M = Ir; Pz = pz (3) or dmpz (4)) have been prepared by reaction of [M₂(μ-Cl)(μ-Pz)(COD)₂] with LiPPh₂. Substitution of the chloride bridge in [Rh₂(μ-Cl)(μ-PPh₂)(COD)₂] by an azolate on compound is a good method for preparing complexes [Rh₂(μ-az)(μ-PPh₂)(COD)₂] (az = 1,2,4-triazolate (tz) (5), or tetrazolate (ttz) (6)). The preparation of the heterobridged heterotrinuclear complexes [{M(μ-pz)(μ-PPh₂()COD)}₂Pd] (M = Rh (7) or Ir (8)) is also reported.