Carbene Complexes in Organic Synthesis
Summary
Carbene complexes are organometallic species characterised by a neutral divalent carbon centre coordinated to a transition metal. These complexes fall into distinct classes: Fischer carbenes, which are electrophilic and stabilised by π-accepting ligands; Schrock carbenes, which are nucleophilic and supported by strongly donating alkyl ligands; and N-heterocyclic carbenes (NHCs), which combine robust σ-donation with steric tunability. Carbene complexes have become indispensable tools in organic synthesis, facilitating olefin metathesis, cyclopropanation, C–H insertion and cross-coupling reactions. Their unique metal–carbon multiple bonds enable construction of complex molecular frameworks in a step-economical manner, underpinning the synthesis of natural products, pharmaceuticals and advanced materials. Recent trends focus on sustainable catalysis through first-row transition metals and metal-free carbene transfer, as well as the design of chiral carbene ligands that deliver exceptional enantioselectivity.
Research from Nature Portfolio
No recent Nature Portfolio content available.
Carbene Complexes in Organic Synthesis publication trend
The graph below shows the total number of articles in carbene complexes in organic synthesis across all publications each year (not limited to Nature Index journals).
Technical terms
Carbene: A neutral divalent carbon species bearing two non-bonded electrons, capable of forming metal–carbon multiple bonds.
Fischer carbene: An electrophilic metal–carbene complex stabilised by π-accepting ligands, typically associated with late transition metals.
Schrock carbene: A nucleophilic metal–carbene complex supported by strongly σ-donating alkyl ligands, commonly found with early transition metals.
N-heterocyclic carbene (NHC): A stable carbene ligand in which the divalent carbon resides within a heterocyclic ring, noted for strong σ-donation and robustness.
Cyclopropanation: A reaction that forms three-membered cyclopropane rings via carbene addition to alkene double bonds.
Olefin metathesis: A catalytic process that exchanges alkene fragments between olefins through metal–carbene intermediates.
About these summaries
This Nature Research Intelligence Topic summary is created with the cited references and a large language model. We take care to ground generated text with facts, and have systems in place to gain human feedback on the overall quality of the process in line with our AI principles. We strive to create accurate and useful summaries for people unfamiliar with the research topic and that supports this goal. These pages are a beta release and will be updated as we learn how best to help people gain value from a research topic summary.
Turn complex research questions into confident strategic decisions
When you're under pressure to set direction, justify investment, or understand your competitive position, you need more than raw data — you need trusted insights you can act on.
Benchmark your performance against global peers using robust, methodologically sound analysis.
Combine quantitative metrics with qualitative expert insight to uncover strengths, gaps and emerging opportunities.
Gain tailored, decision-ready recommendations aligned to your strategic priorities.
Talk to us to learn more about our data dashboards and bespoke strategy reports.
Grow research skills, confidence and careers with training built for every stage of the research lifecycle.
Developed with Nature Portfolio journal Editors and internationally renowned experts. Discover three ways to learn:
Self-paced, online courses in convenient bite-sized units, covering key skills across scientific writing, publishing, grant writing, data analysis, and more.
Expert trainer-led workshops with hands-on exercises and real-time feedback across core research skills, delivered via interactive group sessions.
Editor-led workshops combining core principles in writing and publishing, personalised 1:1 feedback from Nature Portfolio Editors and hands-on exercises.
Explore course catalogues and workshop agendas, enquire about the options or request institutional pricing.