Synthesis and characterization of iron and ruthenium complexes bearing P-N ligands based on 8-hydroxyquinoline |
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| Authors: | David Benito-Garagorri Christina M Standfest-Hauser Karl Kirchner |
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| Institution: | a Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9, A-1060 Vienna, Austria
b Institute of Chemical Technologies and Analytics, Vienna University of Technology, Getreidemarkt 9, A-1060 Vienna, Austria |
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| Abstract: | The synthesis of bidentate aminophosphine ligands (PNquin) based on 8-hydroxyquinoline is described. These ligands react with cis-Fe(CO)4Br2 to give selectively octahedral complexes of the type cis,cis-Fe(PNquin)(CO)2Br2. There is only one isomer formed where the two CO and the two bromide ligands adopt a cis configuration. The reaction of RuCp(CH3CN)3]PF6 with PNquin ligands affords the halfsandwich complexes RuCp(PNquin)(CH3CN)]PF6 in high isolated yields. Likewise, treatment of Ru(η6-p-cymene)(μ-Cl)Cl]2 with PNquin in the presence of AgCF3SO3 affords halfsandwich complexes of the type Ru(η6-p-cymene)(PNquin)Cl]CF3SO3. All ligands and complexes are characterized by NMR and IR spectroscopy. The X-ray structure of representative compounds is reported. In addition, the relative stability of isomeric structures and conformers of Fe(PNquin-Ph)(CO)2Br2 is studied by means of DFT calculations. |
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| Keywords: | Phosphinito quinoline ligands Iron complexes Ruthenium complexes/carbonyl complexes DFT calculations |
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