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Bis(diphenylphosphino)methane-assisted Synthesis of Iron-platinum and -palladium Clusters. Crystal Structures of and (dppm=Ph2PCH2PPH2)

DOI: 10.1039/DT9900003801

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 3801 - 3814 (1990)

Update date:2022-07-29

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Authors:

Braunstein, PierreBraunstein, Pierre

Richert, Jean-LucRichert, Jean-Luc

Dusausoy, YvesDusausoy, Yves

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Article abstract of DOI:10.1039/DT9900003801

Reactions of (dppm=Ph2PCH2PPh2) complexes with carbonyl reagents afforded dppm-bridged Fe-M mixed-metal complexes: (1) was best obtained using , (2) by the reaction K, (4) by the reaction with Na2, and (5) by the reaction with Na2.Reactions of Pd with Na2 afforded (6; M=Pd) and (7; M=Pt) in high yields.Cluster (7) was shown to exist in two isomeric forms.The kinetic isomer, isolated pure at -20 deg C, contains a terminal Pd-bound carbonyl whereas the thermodynamic isomer has a terminal Pt-bound carbonyl ligand.A 1:1 ratio is observed at equilibrium.The cluster (3) was obtained quantitatively by reaction of (1) or with 1 or 2 equivalents of dppm.These reactions were shown to occur first by substitution of the Pt-bound carbonyl ligand.Low-yield interconversion of (1) and (2) was observed as a result of metal-exchange reactions.The structures of clusters (1) and (2) have been established by single-crystal X-ray diffraction studies.In (1) a Fe-Pt bond is bridged by the dppm ligand and Fe(1)-Fe(2) 2.740(2), Pt-Fe(1) 2.542(1), and Pt-Fe(2) 2.557(1) Angstroem.In (2) the Pt-Pt bond is bridged by the dppm ligand and Fe-Pt(1) 2.541(3), Fe-Pt(2) 2.541(4), and Pt(1)-Pt(2) 2.581(1) Angstroem.The i.r. and n.m.r. spectra (1H, 1H-<31P>, and 31P-<1H>) of the new compounds are reported and discussed.

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Product name:bis(μ-bis(diphenylphosphino)methane)-hexacarbonyl-triangulo-di-ironpalladium

Cas No:132512-45-9

132512-45-9

R&D Labs maybe for 132512-45-9

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