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Updated: Dec 13, 2025

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A bis(germylene) functionalized metal-coordinated polyphosphide and its isomerization.

Ravi Yadav1, Bhupendra Goswami1, Thomas Simler1

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|August 5, 2020
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Pentaphosphaferrocene served as a phosphorus source for novel germylene-polyphosphide complexes. Reactivity with a digermylene resulted in a unique iron-phosphorus-germanium complex exhibiting unprecedented isomerization.

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Area of Science:

  • Organometallic Chemistry
  • Main Group Chemistry
  • Coordination Chemistry

Background:

  • Pentaphosphaferrocene, [Cp*Fe(η5-P5)], is a known source of polyphosphorus ligands.
  • Germylene complexes are valuable building blocks in inorganic synthesis.

Purpose of the Study:

  • To explore the reactivity of pentaphosphaferrocene with digermylenes.
  • To synthesize and characterize novel germylene-polyphosphide complexes.

Main Methods:

  • Reaction of [Cp*Fe(η5-P5)] with [LGe-GeL] (L = {PhC(NtBu)2}).
  • Isolation and characterization of the resulting complex using spectroscopic and crystallographic techniques.

Main Results:

  • A stepwise reaction involving reductive homolytic cleavage of the Ge-Ge bond was observed.
  • Formation of the complex [(LGe)2{(μ,η4-P5)FeCp*}] with an unprecedented isomerization.

Conclusions:

  • Pentaphosphaferrocene can serve as a versatile polyphosphorus source in reactions with low-valent main group element compounds.
  • The observed isomerization highlights novel reactivity pathways in germylene-polyphosphide chemistry.