Abstract
Photochemically generated cationic cyclopentadienyl iron fragments [FeCp]+ allow a specific stacking reaction of [(t-Bu3C3P2)Fe(t-Bu2C2P3)]. This results in the transient formation of an unstable cationic Fe-Fe triple-decker sandwich complex which decomposes by deliberating the neutral sandwich complex [CpFe(t-Bu2C2P3)], and is stacked again by a second [FeCp]+-unit, yielding the moderately stable cationic triple-decker sandwich complex [CpFe(t-Bu2C2P3)FeCp]+ with a central mi-eta5:eta5-triphospholyl ligand. Air exposure or storage of solutions at room temperature leads to a destacking and the neutral triphosphaferrocene derivative [CpFe(t-Bu2C2P3)] is formed again almost quantitatively in respect to the pentaphospha-ferrocene educt.
Published Version
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