163858-01-3Relevant academic research and scientific papers
Metal Complexes of Dyes. VI Phosphine-Nickel, Palladium, Platinum Complexes and Pentamethylcyclopentadienyl Rhodium and Iridium Complexes of 2,2'-Dihydroxyazoarenes
Hintermaier, Frank,Kuehlwein, Frank,Robl, Christian,Beck, Wolfgang
, (2008/10/08)
The terdentate dianions of 2,2'-dihydroxyazobenzene (L(1)H), 1-(2-hydroxy-4-nitrophenylazo)-2-naphthol (L(2)H), 1-(2-hydroxy-5-nitrophenylazo)-2-naphthol (L(3)H) and 1-phenyl-3-methyl-4-(2-hydroxy-5-nitrophenylazo)-5-pyrazolone (L(4)H) form with chloro bridged complexes [(R3P)MCl2]2 (M=Pd, Pt; R=Ph, nBu), [(η5-C5Me5)MCl2]2 (M=Rh, Ir) and with (nBu3P)2NiCl2 the metal dye complexes (R3P)ML (M=Ni, Pd, Pt) and (C5Me5)ML (M=Rh, Ir). The structures of (Ph3P)PtL(1) and (nBu3P)PdL(3) have been determined by X-ray diffraction. For the complexes (η5-C5Me5)ML (M=Rh, Ir) with asymmetric metal centers two diastereoisomers are detected by NMR spectroscopy which points to the "hydrazone" form of the azo ligand with a pyramidalized N-atom.
