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Samarium(III) Pentalene Sandwich Compounds [Sm(?8-C8H4{SiiPr3-1,4}2)(Cp*)] and [Sm(?8-C8H4{SiiPr3-1,4}2)(?5-C8H5{SiiPr3-1,4}2)] and a Mixed-Valence Hexasamarium Cluster Derived from Sm(II)-Based Solvent Activation

journal contribution
posted on 2023-06-08, 09:49 authored by Owen T Summerscales, David R Johnston, Geoff Cloke, Peter B Hitchcock
The reaction of the pentalene salt C8H4{(SiPr3)-Pr-i-1,4}(2)[K](2) with [SmCp*(mu-I)(THF)(2)](2) yields not the expected Sm(II) pentalene-bridged dimer but the Sm(III) sandwich complexes [Sm(eta(8)-C8H4{(SiPr3)-Pr-i-1,4}(2))(eta(5)-Cp*)] (1) and [Sm(eta(8)-C8H4{(SiPr3)-Pr-i-1,4}(2))(eta(5)-C8H5{(SiPr3)-Pr-i-1,4}(2))] (2) and the mixed-valence cluster [Cp*Sm-6(6)(OMe)(8)O][K(THF)(6)] (3) via solvent activation of THF. The samarium(III) sandwich compound 2 incorporates an eta(8)-pentalene ligand and an eta(5)-hydropentalenyl ligand. X-ray crystallography shows the Sm(II)/Sm(III) mixed-valence cluster compound 3 to contain a centrosymmetric hexanuclear array of Cp*Sm units, bridged by face-centered mu(3)-methoxy groups, with a central oxo unit.

History

Publication status

  • Published

Journal

Organometallics

ISSN

0276-7333

Publisher

American Chemical Society

Issue

21

Volume

27

Page range

5612-5618

Department affiliated with

  • Chemistry Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2012-02-06

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