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Updated: May 11, 2026

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Noyori hydrogenation: aromaticity, synchronicity, and activation strain analysis
Olalla Nieto Faza1, Carlos Silva López, Israel Fernández
1Departmento de Química Orgánica, Universidade de Vigo, Lagoas-Marcosende s/n 36310, Vigo, Spain.
Computational studies reveal Noyori hydrogenation and double group transfer reactions share a concerted mechanism. Differences in synchronicity and aromaticity were observed, with heteroatoms lowering reaction barriers by increasing interaction energy.
Area of Science:
- Computational chemistry
- Organic reaction mechanisms
- Catalysis
Background:
- Noyori hydrogenation is a key reaction for reducing multiple bonds.
- Double group transfer reactions share mechanistic similarities with hydrogenation.
- Understanding transition states is crucial for catalyst design.
Purpose of the Study:
- To computationally explore the mechanism of Noyori hydrogenation.
- To compare Noyori hydrogenation with double group transfer reactions.
- To identify factors influencing reaction barriers.
Main Methods:
- Density functional theory (DFT) calculations.
- Activation Strain Model (ASM) analysis.
Main Results:
- Both reaction types proceed concertedly via six-membered transition structures.
- Significant differences in synchronicity and aromaticity were identified.
- Heteroatoms in acceptor moieties increase interaction energy, lowering reaction barriers.
Conclusions:
- The study provides quantitative insight into Noyori hydrogenation mechanisms.
- The findings highlight the role of heteroatoms in catalytic efficiency.
- The research offers a deeper understanding of concerted pericyclic reactions.
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