| Abstract
| - The terminal hydride in the PtIPtIPtII triangulo cluster Pt3(μ-PBut2)3(H)(CO)2 (1) may beremoved by one-electron oxidants such as [Cp2Fe]PF6. Under carbon monoxide the reactionaffords the symmetrical, cationic derivative [Pt3(μ-PBut2)3(CO)3]PF6 (2). By operating withan excess of the suitable ligand, we also prepared [Pt3(μ-PBut2)3(CO)2(NCCH3)]PF6 (3) and[Pt3(μ-PBut2)3(CO)2(CH2CH2)]PF6 (4). New neutral triangular precursors were obtained bysubstitution of the CO ligands contained in 1 with isocyanides. The hydrides Pt3(μ-PBut2)3(H)(CNR)2 (5, R = CH2Ph; 6, R = C6H4-p-CH3; 7, R = But) were isolated by this route. Complex7 reacts with chloroform to give Pt3(μ-PBut2)3(Cl)(CNBut)2 (8), which, under an excess ofCNBut, yields the cationic derivative [Pt3(μ-PBut2)3(CNBut)3]Cl (9). The new triangulo clusterswere characterized by multinuclear NMR spectroscopy and, as far as 4 and 7 are concerned,by single-crystal X-ray diffraction.
- New cationic ([Pt3(μ-PBut2)3(CO)2(L)]PF6 (L = CO (2), CH3CN (3), CH2CH2 (4)) and [Pt3(μ-PBut2)3(CNBut)3]Cl (9)) and neutral (Pt3(μ-PBut2)3(X)(CNR)2 (X = H, R = CH2Ph (5), C6H4-p-CH3 (6), But (7); X = Cl, R = But (8))) PtIPtIPtII triangulo clusters have been prepared and characterized. The crystal and molecular structures of complexes 4 and 7 are also reported.
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