172991-38-7Relevant academic research and scientific papers
Synthesis and characterization of dinuclear platinum group metal complexes of a hexadentate ligand α,α′-bis(bis-(2-(diphenylphosphino)ethyl)amino)-m-xylene
Paul, Parimal,Tyagi, Beena
, p. 675 - 682 (2008/10/08)
A number of dinuclear complexes of platinum group metal ions with a hexadentate ligand, α,α′-bis(bis-(2-(diphenylphosphino)ethyl)amino)-m-xylene (L), were synthesized. The reaction of [MCln(COD)], (n = 1, x = 2 when M = RhI and IrI and n = 2, x = 1 when M = PdII and PtII) with the ligand L resulted in the formation of square planar dinuclear complexes of the composition [M2LCl2]n+ (n = 0 for RhI and IrI and n = 2 for PdII and PtII). The reaction of [Pt Cl2(COD)] with L under different experimental conditions yielded a tetranuclear complex, [Pt4L2Cl4]Cl4. The reaction of [M2LCl2] (M = RhI, IrI) with CO gas at ambient temperature resulted in the formation of the pentacoordinate CO adduct, [M2LCl2(CO)2], with trigonal bipyramidal geometry. The reaction of [RhCl(CO)(AsPh3)2] and [IrCl(CO)(PPh3)2] with L gave complexes of the same composition as that of the CO adduct, [M2LCl2(CO)2], with two isomeric forms in the case of iridium. The reaction of [Rh2LCl2] with AgClO4 in acetonitrile resulted in the complete displacement of chloride, with the formation of [Rh2L(NCCH3)2](ClO4)2. A complex of the composition [Rh2L(PPh3)2](BPh4)2 was obtained when [RhCl(COD)]2 was reacted with L in the presence of PPh3 in equimolar ratio followed by addition of NaBPh4. The reaction of hydrated iridium trichloride gave a dinuclear octahedral complex of IrIII of composition [Ir2LCl6]. The geometry of the complexes was established by 31P{1H} NMR spectral data.
