Nuclear magnetic resonance studies on metal complexes. Part IX. A 31P-INDOR investigation of IrCl3(PMe2Ph)(Ph2PCH2CH2PPh2) and related complexes

Abstract

The complexes IrCl₂X(PMe₂Ph)(Ph₂PCH₂CH₂PPh₂)(X = NO₃, NO₂, N₃, NCO, –NCS, Cl, Br, I, pyridine, or CO), IrCl₃(AsMe₂Ph)(Ph₂PCH₂CH₂PPh₂), and IrCl₃(PMe₂Ph)(Ph₂AsCH₂CH₂AsPh₂) have been synthesised. The relative signs of the coupling constants, ²J(P–CH₃), ⁴J(P–lr–P-CH₃)(trans), and ²J(P–lr–P)(trans) and the ³¹P chemical shifts have been measured using the methyl resonance pattern of the PMe₂Ph or AsMe₂Ph ligand and ³¹P-INDOR. I.r. and electronic absorption spectral data are also reported and discussed.