New Multihydride Complexes of Rhenium containing Diphosphine Ligands: Low-temperature Protonation of

DOI: 10.1039/DT9940000917

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 917 - 924 (1994)

Update date:2022-08-05

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Authors:

Fontaine, Xavier L. R.

Layzell, Timothy P.

Shaw, Bernard L.

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Article abstract of DOI:10.1039/DT9940000917

Treatment of oxochloro complexes of the type (L-L = diphosphine) with sodium tetrahydroborate gave complexes of the type .Treatment of with triphenylphosphine gave a mixture of the pentahydride and the trihydride .However, treatment of 1a with dppm in refluxing toluene, followed by slow crystallisation, gave which was isolated and characterised by variable-temperature NMR spectroscopy.Prolonged heating of 1a with dppm gave the trihydride , the fluxionality of which was studied by NMR spectroscopy between +90 and -70 deg C.Protonation of 1a with HBF4*Et2O, at -80 deg C, gave a complex formulated as 2-H2)(dppen-PP')>(1+) which, on warming to ambient temperature, was cleanly converted to a dirhenium multihydrate species tentatively formulated as <(dppen-PP')H3Re(μ-H)2ReH3(dppen-PP')> on the basis of IR and NMR evidence.

Full text of DOI:10.1039/DT9940000917

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