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Updated: Jun 16, 2025
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Achieving Moderate Pressures in Sealed Vessels Using Dry Ice As a Solid CO2 Source
Published on: August 17, 2018
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Carbon Suboxide, C2O3: A Hidden σ0π2 Carbene
Nargish Sultana1, Kangkan Sarmah1, Ankur K Guha1
1Advanced Computational Chemistry Centre, Cotton University, Assam, Panbazar, Guwahati, 781001, India.
Summary
Carbon suboxide (C3O2) exhibits unexpected reactivity with hydride ions, revealing a unique carbene character. This finding expands the understanding of "Carbone" chemistry and its electronic structure.
Area of Science:
- Inorganic Chemistry
- Theoretical Chemistry
- Quantum Chemistry
Background:
- Carbon suboxide (C3O2) is known for its linear geometry and two lone pairs on the central carbon, termed "Carbones".
- Previous studies focused on C3O2 reactivity with protons, overlooking its interaction with hydride ions.
Purpose of the Study:
- To investigate the unexplored reactivity of carbon suboxide with hydride ions.
- To analyze the electronic structure and carbene character of C3O2 in relation to hydride ion affinity.
Main Methods:
- Detailed quantum chemical calculations were employed.
- Analysis of the electronic structure and bonding in carbon suboxide.
Main Results:
- Quantum chemical calculations predict significant hydride ion affinity for carbon suboxide.
- This reactivity is consistent with a σ0π2 carbene character in C3O2.
- A similar σ0π2 carbene character was identified in carbodiphosphorane, C(PH3)2.
Conclusions:
- Carbon suboxide exhibits previously unrecognized reactivity towards hydride ions.
- The study highlights a σ0π2 carbene character in C3O2, broadening the scope of "Carbone" chemistry.
- This bonding situation offers new avenues for exploring "Carbone" chemistry.
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