Pushkarevsky, Nikolay A. and Konchenko, Sergey N. and Scheer, Manfred (2007) Synthesis, Structure and Isomerism of the [Fe3Pt(μ4-Q)(CO)9(dppm)] Clusters (Q = Se, Te; dppm = Ph2PCH2PPh2). Journal of Cluster Science 18 (3), pp. 606-617.
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The reaction of K2[Fe3(μ3-Q)(CO)9] (Q = Se (K2[1a]), Te (K2[1b])) with [(dppm)PtCl2] leads to the addition of a [(dppm)Pt]2+ unit to a Fe2Q face of the initial cluster. By this way new heteronuclear clusters [Fe3Pt(μ3-Q)(CO)9(dppm)] were obtained possessing a butterfly-shaped cluster core bridged by a μ4-Q unit. It has been found that the resulting Fe-Pt clusters exist as equilibrium mixtures of two isomeric forms in solution differing by the dppm coordination mode: as a chelate ligand coordinated to Pt or as a bridging ligand coordinated to Pt and Fe atoms. The mixtures of isomers can be separated by chromatography and the pure isomers can be isolated as stable crystalline phases. Solutions of both isomers attain equilibrium at normal conditions in about 1 month as found by NMR.
|Institutions:||Chemistry and Pharmacy > Institut für Anorganische Chemie > Chair Prof. Dr. Manfred Scheer|
|Keywords:||Cluster; Carbonyl complexes; Iron; Platinum; Selenium; Tellurium|
|Subjects:||500 Science > 540 Chemistry & allied sciences|
|Created at the University of Regensburg:||Unknown|
|Deposited On:||07 Jun 2010 14:38|
|Last Modified:||07 Jun 2010 14:38|
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