Spectroscopic and structural characterization of cationic N-(2-aminoethyl)aziridine-N,N′ chelate complexes of the d-metals Rh(III) and Ir(III) |
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| Authors: | Roman Bobka J Nicolas RoedelBernd Neumann Tobias NigstIngo-Peter Lorenz |
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| Institution: | Department of Chemistry and Biochemistry, Ludwig-Maximilians University, Butenandtstraße 5-13, (Building D), 81377 Munich, Germany |
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| Abstract: | The syntheses of the compounds M(Cp∗)(aeaz)(az)](OTf)2 (4, 5) (M = Rh(III), Ir(III); aeaz = C2H4NC2H4NH2, az = C2H4NH (3)) containing cationic N-(2-aminoethyl)aziridine-N,N′ chelate complexes are described. The bis-aziridine complexes MCl(Cp∗)(az)2]Cl (M = Rh (1), M = Ir (2)) react with an excess of the aziridine (az) in the presence of AgO3SCF3 (=AgOTf) via AgCl precipitation and az addition followed by a metal-mediated coupling reaction, to give the compounds M(Cp∗)(aeaz)(az)](OTf)2 (4, 5). The new aeaz ligand is formally the dimerisation product of az. Using the same reaction conditions with the analogous, but weaker Lewis acidic ruthenium(II) complex RuCl(C6Me6)(az)2]Cl (6) an anion exchange reaction yielding RuCl(C6Me6)(az)2]OTf (8) is observed. After purification, all compounds are fully characterized using IR, FAB-MS, 1H and 13C NMR spectroscopy. The single crystal X-ray structure analysis reveals a distorted octahedral geometry for all complexes. |
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| Keywords: | Aziridine Chelating ligands Crystal structures Iridium Rhodium Ruthenium |
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