Reactions of dioxygen with benzylnickel complexes |
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| Institution: | 1. Department of Chemistry, National Institute of Technology Kurukshetra, Haryana, 136119, India;2. School of Applied Sciences, Om Sterling Global University, Hisar, Haryana, 125001, India;3. School of Chemical Engineering and Physical Sciences, Lovely Professional University, Phagwara, Punjab, 144411, India;4. Division of Organic Chemistry, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411008, India;1. Department of Applied Chemistry, Cochin University of Science and Technology, Kochi 682 022, Kerala, India;2. Post Graduate and Research Department of Chemistry, Maharaja''s College, Ernakulam;3. Sivas Cumhuriyet University, Health Services Vocational School, Department of Pharmacy, 58140, Sivas, Turkey;4. Sivas Cumhuriyet University, Faculty of Education, Math. and Edu., 58140, Sivas, Turkey;5. Analytical Sciences Division, Central Salt and Marine Chemicals Research Institute, Bhavanagar, Gujarat 364 002, India;6. Department of Chemistry, College of Science, King Khalid University, Abha-61421 KSA |
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| Abstract: | The benzyl complexes Ni(X)(CH2C6H5)(PCy3) (X = Cl, CN; Cy = cyclohexyl) react with molecular oxygen to give benzaldehyde and benzyl alcohol as main oxidation products. The ratio of the two products is strongly dependent on the nature of X and is also influenced by the solvent and the temperature. Isotopic labelling and mass spectra show that the hydrogen atoms necessary for the formation of the benzyl alcohol are supplied by the phosphine ligands. Isolation and characterization of the chloride complex by conventional spectroscopic techniques (IR, 1H 31P NMR, visible spectra) provide evidence in favour of a η3-τ-benzyl structure for the compound. |
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