ANIONIC TETRANUCLEAR PLATINA-BETA-DIKETONATES OF PLATINA-BETA-DIKETONES - ORGANOMETALLIC ANALOGS OF PLATINUM BLUE COMPLEXES

The platina-beta-diketone [Pt-2{(COMe)(2)H}(2)(mu-Cl)(2)] (1) reacts w ith aliphatic amines [nBuNH(2), (iPr)(2)NH, NEt3], N-methylaniline, an d N,N-dimethylaniline, as well as with strong bases, such as a proton sponge or [NMe4]OH, in an equimolar ratio to give the anionic platina- beta-diketonato complexes of platina-beta-diketones [BH](2)[{Cl2Pt(mu- COMe)(2)Pt[(CoMe)(2)H]}(2)] (3) (B = nBuNH(2) (3a), (iPr)(2)NH (3b), N Et3 (3c), PhNHMe (3d), PhNMe2 (3e), C10H6(NMe2)(2) [1,8-bis(dimethylam ino)naphthalene] (3f) and [NMe4](2)[{Cl2Pt(mu-CoMe)(2)Pt[(COMe)(2)H])( 2)] (3g)}. All complexes were characterized by microanalysis, and by H -1-NMR and IR spectroscopy. X-ray structure analyses reveal that in th e solid state the complexes 3a.0.5 CH2Cl2 and 3g.2CH(2)Cl(2) consist o f tetranuclear dianions with zigzag Pt-4 chains [Pt-Pt-Pt angle: 122.9 2(3)degrees (3a), 119.30(6)degrees (3g)]. The central Pt Pt distances [3a: 3.171(1) Angstrom, 3g: 3.176(1) Angstrom] give evidence for close d shell d(8)-d(8) interactions. Thus, these bis(acyl)-bridged complexe s can be regarded as organometallic analogues of platinum blue complex es.