A new binuclear Ni(II) complex, an effective A-coupling catalyst in solvent-free condition.

Heliyon

Department of Inorganic Chemistry, Faculty of Chemistry, University of Tabriz, P.O. Box 5166616471, Tabriz, Iran.

Published: July 2023


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Article Abstract

A newly binuclear nickel(II) complex, [Ni(en)(ox)](ClO) () (where en = ethylenediamine, and ox = oxalate), has been isolated from a reaction of NiCl·6HO, ethylenediamine, ammonium oxalate and sodium perchlorate in water and its crystal structure has been determined by X-ray crystallography and infra-red techniques. Compound was successfully employed to promote the one-pot reaction of aldehydes, amines and acetylenes for the construction of corresponding propargylamines under solvent-free media with fine yields. Further studies reveal this catalytic system can be refreshed and used again in five runs.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10395144PMC
http://dx.doi.org/10.1016/j.heliyon.2023.e17743DOI Listing

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  • Crownphyrinogens and crownphyrins are macrocycles that blend features from both porphyrinoids and crown ethers, allowing for unique reactivity due to their dual-nature cavity.
  • When Ni(II) and Pd(II) are inserted into these structures, they form coordination compounds that can result in either monomeric or accordion-like dimeric assemblies, depending on the oxidation state.
  • Reactions with Na(I) and K(I) predominantly involve the crown ether segment, leading to notable dimeric complexes, and larger crownphyrins can create binuclear complexes that demonstrate distinct reactivity properties from each of its cavities.
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