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Controlling the oxidation of bis-tridentate cobalt(II) complexes having bis(2-pyridylalkyl)amines: Ligand: vs. metal oxidation
Babu Varghese,
Published in Royal Society of Chemistry
2017
PMID: 28621377
Volume: 46
   
Issue: 33
Pages: 10830 - 10836
Abstract
Two bis-tridentate chelated cobalt(ii) complexes, which differ in the ligand structure by a methylene group, activate molecular oxygen (O2), and give different oxidation products. The O2 reaction of [CoII(pepma)2]2+ (1) with unsymmetrical 2-(2-pyridyl)-N-(2-pyridylmethyl)ethanamine (pepma) results in ligand oxidation, to the corresponding Co(ii) imine complex [CoII(pepmi)2]2+ (2). Contrastingly, the Co(ii) complex [CoII(bpma)2]2+ (3) of similar symmetrical bis(2-pyridylmethyl)amine (bpma), undergoes metal oxidation, yielding a cobalt(iii) complex, [CoIII(bpma)2]2+ (4). The reversibility of the amine to imine conversion and the stability of the Co(ii) imine complex (2) are investigated. Furthermore, the solution dynamics of Co(ii) complexes are highlighted with the help of paramagnetic 1H-NMR spectroscopy. © 2017 The Royal Society of Chemistry.
About the journal
JournalData powered by TypesetDalton Transactions
PublisherData powered by TypesetRoyal Society of Chemistry
ISSN14779226
Open AccessYes
Concepts (15)
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    Cobalt
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    Ligands
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    Molecular oxygen
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    Nitrogen compounds
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    Nuclear magnetic resonance spectroscopy
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    Oxidation
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    1h nmr spectroscopy
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    BIS(2-PYRIDYLMETHYL)AMINE
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    Cobalt complexes
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    LIGAND STRUCTURE
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    METAL OXIDATION
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    METHYLENE GROUPS
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    OXIDATION PRODUCTS
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    SOLUTION DYNAMICS
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    Cobalt compounds