Metallkomplexe mit biologisch wichtigen Liganden, CXXVII: Halbsandwich-Komplexe von Ruthenium, Rhodium und Iridium sowie phosphanhaltige Palladium- und Platin(II)-Komplexe mit Schiff-Basen aus α-Aminosäureanionen und Aldehyden

Reactions of the anions (L) of Schiff bases from S-α-amino acids and cinnamic aldehyde or 4-methoxy or 2,4-dimethoxy benzaldehyde with chloro-bridged compounds (R3P)(Cl)M(μ-Cl)2 M(Cl)(PR3) (M=Pd, Pt), (p-cymene)(Cl)Ru(μ-Cl)2Ru(Cl)(p-cymene) and (Cp*)(Cl)M(μ-Cl)2M(Cl)(Cp*) (M=Rh, IR) give the (N,O) chelate complexes cis/trans-(R3P)(Cl)M(L), (p-cymene)(Cl)RuL and (Cp*)(Cl)M(L) (M=Rh, Ir). The complexes (Cp*)(Cl)M[O2CCH(CHMe2)NCHCHCHPh] (M=Rh, Ir) with a chiral metal atom are formed with a high diastereoisomeric excess (9/1). The structures of (p-cymene)(Cl)Ir[O2CCH(CHMe2)NCHCHCHPh) (7), cis(P,N)-(nBu3)(Cl)Pt[O2CCH(Me)NCHC6H4OMe] (19), (Cp*)(Cl)Rh[O2CCH(Me)NCHC6H4OMe] (22) and of (p-cymene)(Cl)Ru[O2CCH(Me)NCHC6H3(OMe)2] (26) were determined by X-ray diffraction.