Related Experiment Video
Updated: Jan 12, 2026

Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction
Published on: August 23, 2018
A benign and scalable reverse water-gas shift reaction in EMIM acetate with Ru-PNP catalysts
Perla Haidée García-Ríos1, Sakhitha Koranchalil1, Martin Nielsen1
1Department of Chemistry, Technical University of Denmark, Kemitorvet, Building 207, 2800, Kgs. Lyngby, Denmark. marnie@kemi.dtu.dk.
Abstract:
The combination of the ionic liquid 1-ethyl-3-methylimidazolium acetate, [EMIM]OAc, and Ru-MACHO-BH catalyst facilitates efficient and scalable reverse water-gas shift (RWGS) of CO2/H2 mixtures under mild conditions. Optimized conditions of 150 °C and 10 : 10 bar CO2 : H2 achieve the highest reaction selectivity towards CO (31%) whereas 5 : 20 bar CO2 : H2 attains higher CO yield (26%) but also significantly promotes formic acid formation, highlighting the potential of ionic liquid/Ru-MACHO-BH as an effective and versatile hybrid system for CO2 valorisation.
Related Concept Videos
Regioselectivity and Stereochemistry of Acid-Catalyzed Hydration
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
Radical Anti-Markovnikov Addition to Alkenes: Overview
Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
Regioselectivity of Electrophilic Additions-Peroxide Effect
Aldehydes and Ketones to Alkenes: Wittig Reaction Mechanism
The reaction begins with the nucleophilic addition between a phosphorus ylide and the carbonyl compound. Due to its carbanionic character, phosphorus ylide acts as a strong nucleophile and attacks the electrophilic carbonyl group. This generates a charge-separated dipolar intermediate called betaine. The negatively charged oxygen atom and...

