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Arsinocarbyne reactivity.

Benjamin J Frogley1, Anthony F Hill1

  • 1Research School of Chemistry, The Australian National University, Canberra, ACT 0200, Australia. a.hill@anu.edu.au.

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Summary
This summary is machine-generated.

This study details the reactivity of tungsten diphenylarsinocarbyne complexes. These complexes form new heterometallic compounds and demonstrate unique coordination behavior with gold(I).

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Area of Science:

  • Organometallic Chemistry
  • Coordination Chemistry
  • Tungsten Chemistry

Background:

  • Tungsten-based carbynes are versatile synthetic precursors.
  • The coordination behavior of pyramidal arsenic ligands is of significant interest.
  • Exploring heterobimetallic and trimetallic complexes expands the scope of inorganic synthesis.

Purpose of the Study:

  • To investigate the reactivity of the tungsten diphenylarsinocarbyne complex [W(CAsPh2)(CO)2(Tp*)] (1).
  • To explore the formation of heterobi- and trimetallic complexes using 5d metal centers.
  • To study the coordination preferences of the arsenic atom and the W-C bond.

Main Methods:

  • Synthesis of the tungsten diphenylarsinocarbyne precursor.
  • Coordination reactions with osmium(II), iridium(III), platinum(II), and gold(I) complexes.
  • Methylation of the arsenic center followed by further coordination studies.

Main Results:

  • The pyramidal arsenic atom successfully coordinated to multiple 5d metal centers (Os, Ir, Pt, Au).
  • Formation of novel heterobi- and trimetallic complexes was achieved.
  • The W-C bond was identified as a competitive coordination site for gold(I).
  • Methylation of arsenic yielded the first arsoniocarbyne, with the W-C bond exclusively available for gold(I) coordination.

Conclusions:

  • The tungsten diphenylarsinocarbyne ligand offers diverse coordination possibilities.
  • The study presents new synthetic routes to complex heterometallic structures.
  • The reactivity and coordination behavior of the arsenic center can be tuned through methylation.