Aerobic epoxidation of olefins by carboxylate ligand-based cobalt (II) compound: synthesis, X-ray crystallography, and catalytic exploration

Patra, BN and Ghosh, P and Sepay, N and Gayen, S and Koner, S and Brandao, P and Lin, Z and Debnath, R and Pratihar, JL and Maity, T and Mal, D (2022) Aerobic epoxidation of olefins by carboxylate ligand-based cobalt (II) compound: synthesis, X-ray crystallography, and catalytic exploration. In: Applied Organometallic Chemistry, 36 (3).

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Abstract

A new quinoline carboxylate-based cobalt (II) metal compound, [Co (HL1)2(H2O)4] (1) (H2L1 = 2-hydroxyquinoline-4-carboxylic acid) has been hydrothermally synthesized, and fully characterized by single-crystal X-ray diffraction, powder X-ray diffraction, Fourier-transform infrared (FT-IR), elemental and thermo-gravimetric analysis. Compound 1 shows high thermal stability up to ~300°C. Single-crystal X-ray diffraction study of 1 exhibited monomeric structure experiences further stabilized in solid state through different non-covalent interaction, for example, H-bonding and π···π stacking interaction and extended to 3D supramolecular H-bonded network. Compound 1 efficiently catalyzes epoxidation reactions of olefins under homogeneous conditions using molecular oxygen as an oxidizer. Another reported quinoline carboxylate-based nickel (II) monomer [Ni(L2)2(H2O)2] (2) (HL2 = thiazole-4-carboxylic acid) has been synthesized and characterized to compare it with compound 1 towards aerobic epoxidation reactions, where 1 comes as superior.

Item Type:	Journal Article
Publication:	Applied Organometallic Chemistry
Publisher:	John Wiley and Sons Ltd
Additional Information:	The copyright for this article belongs to the John Wiley and Sons Ltd.
Keywords:	Chelation; Cobalt compounds; Crystal structure; Hydrogen bonds; Molecular oxygen; Nickel compounds; Olefins; Single crystals; Synthesis (chemical); Thermogravimetric analysis; X ray crystallography; X ray diffraction, Aerobic epoxidation; Carboxylate ligands; Compound synthesis; Epoxidation reactions; Fourier transform infrared; High thermal stability; Hydrothermally synthesized; Hydroxyquinolines; Single-crystal X-ray diffraction studies; X- ray diffractions, Carboxylation
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	20 Jan 2022 06:56
Last Modified:	12 Sep 2022 06:17
URI:	https://eprints.iisc.ac.in/id/eprint/71005

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