New access to homodinuclear half-sandwich vinylidenemanganese complexes

Koushik Venkatesan, Thomas Fox, Helmut W. Schmalle, Heinz Berke*

*Corresponding author for this work

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

The d6 low-spin Mn1 half-sandwich dinuclear complexes of the type [{Mn(MeC5H4)(R2PCH 2CH2PR2)=C=C(SnMe3)}2{X}] (X = {μ-1,4-C6H4}, R = Me, 2a; X = {μ-1,4-C 6H4}, R = Et, 2b; X = {μ-1,3-C6H 4}, R = Me, 3a; X = {μ-1,3-C6H4}, R = Et, 3b; X = {μ-4,4-C6H4-C6H4}, R = Me, 4a; X = {μ-4,4-C6H4-C6H4), R = Et, 4b; X = {μ-1,4-C4H2S}, R = Me, 5a, X = {μ-1,4-C4H2S}, R = Et, 5b) were obtained by the treatment of [Mn(C5H4Me) (η6- cycloheptatriene)] with 0.5 equiv. of the corresponding acetylene Me 3Sn-C≡C-X-C≡C-SnMe3 (X = {μ-1,4-C 6H4), {μ-1,3-C6H4}, {μ-4,4-C6H4-C6H4}, {μ-1,4-C4H2S}) and R2PCH2CH 2PR2 (R = Me, Et) at 50 °C for 12 h to yield the corresponding dinuclear complexes in very good yields. These dinuclear tin-substituted vinylidene complexes were further treated with an excess of MeOH to give the corresponding dinuclear parent vinylidene complexes of the type [{Mn(MeC5H4)(R2PCH2CH 2PR2)=C=C(H)}2{X}] (X = (μ-1,4-C 6H4), R = Me, 6a; X = {μ-1,4-C6H 4), R = Et, 6b; X = {μ-1,3-C6H4}, R = Me, 7a; X = {μ-1,3-C6H4}, R = Et, 7b; X = {μ-4,4-C 6H4-C6H4), R = Me, 8a; X = {μ-4,4-C6H4-C6H4), R = Et, 8b). All dinuclear compounds were characterised by NMR and IR spectroscopy and elemental analysis. X-ray diffraction studies were performed on complexes 2b, 3a, 4a and 6a.

Original languageEnglish
Pages (from-to)901-909
Number of pages9
JournalEuropean Journal of Inorganic Chemistry
Issue number5
DOIs
Publication statusPublished - 4 Mar 2005
Externally publishedYes

Keywords

  • Cyclopentadienyl ligands
  • Half-sandwich complexes
  • Molecular devices
  • Phosphanes
  • Vinylidene ligands

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