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A Monometallic Bis(cyaphido) Complex.

Madeleine C Levis1, Monte L Helm1,2, John F C Turner1

  • 1Department of Chemistry, University of Sussex, Brighton, UK.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|May 10, 2024
PubMed
Summary
This summary is machine-generated.

Researchers synthesized and characterized the first bis(cyaphido) complex, trans-[Ru(dppe)2(C≡P)2]. This work demonstrates the stability and synthetic accessibility of multiple cyaphido ligands in ruthenium complexes.

Keywords:
coordination chemistrycyanidecyaphiderutheniumstructure

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Area of Science:

  • Organometallic Chemistry
  • Coordination Chemistry
  • Phosphorus Chemistry

Background:

  • Cyaphido ligands (C≡P) are novel phosphorus-containing analogues of cyano ligands (C≡N).
  • The coordination chemistry and electronic properties of cyaphido ligands are not well understood.
  • Previous studies have focused on monocyaphido complexes.

Purpose of the Study:

  • To synthesize and characterize the first bis(cyaphido) complex.
  • To investigate the synthetic accessibility and stability of complexes with multiple cyaphido ligands.
  • To compare the electronic properties of cyaphido and cyano ligands.

Main Methods:

  • Synthesis of trans-[Ru(dppe)2(C≡P)2] from [Ru(dppe)2(C≡P)]+ via coordination and desilylation of Me3SiC≡P.
  • Synthesis of the heteroleptic analogue trans-[Ru(dppe)2(C≡N)(C≡P)] from the same cation and NaCN.
  • Structural characterization of the synthesized complexes using X-ray crystallography and spectroscopic methods.

Main Results:

  • The first bis(cyaphido) complex, trans-[Ru(dppe)2(C≡P)2], was successfully synthesized and characterized.
  • The study demonstrates the synthetic feasibility and stability of ruthenium complexes bearing multiple cyaphido ligands.
  • Direct comparison reveals that the cyaphido ligand exhibits enhanced π-acidity and higher π-donor character compared to the cyano ligand.

Conclusions:

  • Bis(cyaphido) complexes are synthetically accessible and stable.
  • The cyaphido ligand possesses distinct electronic properties compared to its isoelectronic analogue, the cyano ligand.
  • This work expands the scope of organometallic chemistry involving phosphorus-containing ligands.