Related Experiment Video
Updated: Jul 6, 2025

Chemical Precipitation Method for the Synthesis of Nb2O5 Modified Bulk Nickel Catalysts with High Specific Surface Area
Published on: February 19, 2018
Tetracosanuclear nickel complexes as effective catalysts for cycloaddition of carbon dioxide with epoxides
Guan-Lin Liu1, En-Hsu Wu1, Yu-Ching Hung1
1Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan. cchlin@mail.nchu.edu.tw.
Abstract:
A series of well-defined tetracosanuclear nickel complexes 3-7 facilely produced by one-pot synthesis were active catalysts for cycloaddition of CO2 and cyclohexene oxide (CHO). These nickel complexes were doughnut-like supramolecular coordination complexes involving eight repeating units, and each of them contains one Schiff base ligand and three nickel(II) ions. Notably, the 24-nuclear nickel cluster complex 3 in combination with nucleophilic additives was the most efficient catalyst to mediate CO2 coupling with CHO to generate CO2-based cis-cyclohexene carbonates. In addition to CO2/CHO cycloaddition, complex 3 was also found to effectively couple CO2 with other alicyclic epoxides, generating the corresponding cyclic carbonates. Additionally, kinetic investigations for CO2 cycloaddition of CHO using 3 were reported.
More Related Videos
Related Concept Videos
Cycloaddition Reactions: Overview
Acid-Catalyzed Ring-Opening of Epoxides
Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids
[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction
Base-Catalyzed Ring-Opening of Epoxides
Preparation of Epoxides
Epoxides result from alkene oxidation, which can be achieved by a) air, b) peroxy acids, c) hypochlorous acids, and d) halohydrin cyclization.
Epoxidation with Peroxy Acids
Epoxidation of alkenes via oxidation with peroxy acids involves the conversion of a carbon–carbon double bond to an epoxide using the oxidizing agent meta-chloroperoxybenzoic acid, commonly known as MCPBA. Since the O–O bond of peroxy acids is very weak, the addition of electrophilic oxygen of...

