A heterobimetallic cumulenic μ-carbido complex

Area of Science:

• Organometallic Chemistry
• Inorganic Synthesis
• Coordination Chemistry

Background:

• Tungsten and rhenium complexes are valuable in catalysis and materials science.
• The synthesis of heteronuclear metal carbido complexes presents unique challenges.
• Understanding reactivity of metal-chalcogenide complexes is crucial for developing new synthetic routes.

Purpose of the Study:

• To synthesize and characterize a novel tungsten-rhenium carbido complex.
• To explore the reactivity of a tungsten-tungsten carboselenide precursor.
• To investigate the formation of heteronuclear metal clusters.

Main Methods:

• Reaction of [W(CSe)(CO)2(Tp*)]NEt4 with N-methyl-N-nitroso-4-toluenesulfonamide to form a nitrosyl complex.
• Subsequent reaction with excess [Re(THF)(CO)2(η-C5H5)].
• Characterization of the resulting complexes using spectroscopic and analytical techniques.

Main Results:

• Successful synthesis of the nitrosyl complex [W(CSe)(CO)(NO)(Tp*)].
• Formation of the cumuenic μ-carbido complex [WRe(μ-C)(CO)3(NO)(Tp*)(η-C5H5)].
• Co-formation of the μ-selenido complex [Re2(μ-Se)(CO)4(η-C5H5)2].

Conclusions:

• The synthetic route provides access to a novel heteronuclear tungsten-rhenium carbido complex.
• The reaction demonstrates the utility of the tungsten carboselenide precursor in cluster synthesis.
• This work expands the scope of known organometallic carbido and selenido complexes.