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Preparation and Use of Carbonyl-decorated Carbenes in the Activation of White Phosphorus

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Published on: October 3, 2014

Secondary phosphinocarbyne and phosphaisonitrile complexes.

Annie L Colebatch¹, Anthony F Hill

¹Research School of Chemistry, Australian National University , Canberra, ACT 2601, Australia.

Journal of the American Chemical Society

|December 4, 2014

Summary

Researchers synthesized novel tungsten phosphinocarbyne and phosphaisonitrile complexes using palladium catalysis. These findings expand the scope of organometallic chemistry and coordination compounds.

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The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes

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Published on: April 10, 2015

Area of Science:

Organometallic Chemistry
Tungsten Chemistry
Phosphorus Chemistry

Background:

Tungsten carbyne complexes are versatile synthetic intermediates.
Palladium-catalyzed reactions offer efficient routes to complex molecules.
Understanding the reactivity of W-C bonds is crucial for catalysis.

Purpose of the Study:

To synthesize novel secondary phosphinocarbyne complexes of tungsten.
To explore the deprotonation of these complexes to form anionic phosphaisonitriles.
To structurally characterize the resulting tungsten-phosphorus compounds.

Main Methods:

Palladium-catalyzed coupling of a tungsten bromo(carbyne) precursor with primary phosphines.
Deprotonation of the phosphinocarbyne complexes using a strong base.
X-ray crystallography for structural elucidation of the anionic complex.

Main Results:

Successful synthesis of secondary phosphinocarbyne complexes [W(≡CPHR)(CO)2(Tp*)] via palladium catalysis.
Formation of anionic phosphaisonitrile complexes [W(CPR)(CO)2(Tp*)](-) upon deprotonation.
Structural characterization of the potassium salt [W(CPPh)(CO)2(Tp*)][K(kryptofix)] revealing a unique W-P bonding interaction.

Conclusions:

The palladium-mediated reaction provides a viable route to functionalized tungsten phosphinocarbyne complexes.
Deprotonation offers access to anionic phosphaisonitrile species with potential applications in materials science.
The structural data provides insights into bonding and reactivity in these novel organometallic compounds.