Spectroscopic and structural characterization of cationic N-(2-aminoethyl)aziridine-N,N′ chelate complexes of the d6-metals Rh(III) and Ir(III)
摘要:
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, H-1 and C-13 NMR spectroscopy. The single crystal X-ray structure analysis reveals a distorted octahedral geometry for all complexes. (c) 2007 Elsevier Ltd. All rights reserved.