Fluxionality in [ReH5(PPh3)2(pyridine)]

Fluxionality in [ReH5(PPh3)2(pyridine)]

The new polyhydrides [ReH5(PPh3)2(L)] (1; L = 4-carbomethoxypyridine (a), pyridine (b), 4-picoline (c), 4-(dimethylamino)pyridine (d)), formed by reaction of L with [ReH7(PPh3)2], are rigid on the NMR time scale at low temperature. The low-temperature spectrum is assigned by ROESY NMR studies, and t...

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Veröffentlicht in:Inorganic chemistry 1996-01, Vol.35 (3), p.695-699
Hauptverfasser: Lee, Jesse C, Yao, Wenbin, Crabtree, Robert H, Rüegger, Heinz
Format: Artikel
Sprache:eng
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Zusammenfassung:The new polyhydrides [ReH5(PPh3)2(L)] (1; L = 4-carbomethoxypyridine (a), pyridine (b), 4-picoline (c), 4-(dimethylamino)pyridine (d)), formed by reaction of L with [ReH7(PPh3)2], are rigid on the NMR time scale at low temperature. The low-temperature spectrum is assigned by ROESY NMR studies, and turnstile and pseudorotation fluxionality mechanisms are suggested to account for the two successive coalescence events in the VT NMR spectra.
ISSN:0020-1669
1520-510X
DOI:10.1021/ic950929y