SYNTHESIS OF COMPLEXES OF PLATINUM (II) WITH C,N,N'-TERDENTATE SCHIFF-BASE DONOR LIGANDS - CRYSTAL AND MOLECULAR-STRUCTURE OF [PT(3-ME-4-MEOC6H2C(H)=NCH2CH2NME2)(ME)]

Treatment of the potentially terdentate ligands C6RxH5-xC(H)=N-CH2CH2N Me2 [R: a (x = 2), 2,4-(MeO)(2); b (x = 2), 3,4-(MeO)(2); c (x = 2), 3 -Me-4-MeO; d (x = 3), 2,3,4-(MeO)(3); e (x = 2), 4,5-(OCH2O); f (x = 1 ), 2-NO2] with [PtMe2(COD)] gave the platinated compounds [Pt{C6RxH4-x C(H)=NCH2CH2-NMe2}(Me)] with two fused five-membered rings at platinum . The crystal and molecular structure of [Pt{3-Me-4-MeOC6H2C(H)=NCH2CH 2NMe2}(Me)] has been determined by X-ray crystallography. The reactivi ty of these complexes was tested by the reactions of [Pt{2,4-(MeO)(2)C 6H2C(H)=NCH2CH2NMe2}-(Me)] with tertiary phosphines and diphosphines. In the latter case, dinuclear and mononuclear platinum complexes were synthesized, with bridging or chelating diphosphine ligands, respectiv ely, depending on the complex/diphosphine molar ratio used. The reacti on of the related potentially hexadentate ligand 1,4-[Me2NCH2CH2N=(H)C ](2)C6H4 with [PtMe2(COD)] gave the metallated compound Pt{Me2NCH2CH2N =(H)C}C6H2{C(H)=N-CH2CH2NMe2}Pt(Me)] with five fused rings. (C) 1998 E lsevier Science S.A. All rights reserved.