Synthesis, structure and dioxygen reactivity of Ni(II) complexes with mono-, bis-, tetra- and hexa-oxime ligands

Boyko, Y. D. and Sukhorukov, A. Yu. and Semakin, A. N. and Nelyubina, Y. V. and Ananyev, I. V. and Rangappa, K. S. and Ioffe, S. L. (2014) Synthesis, structure and dioxygen reactivity of Ni(II) complexes with mono-, bis-, tetra- and hexa-oxime ligands. Polyhedron, 71. pp. 24-33. ISSN 0277-5387

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Official URL: https://doi.org/10.1016/j.poly.2014.01.003

Abstract

Four nickel complexes with β-(oximinoalkyl)amine ligands Ox nHn containing one (Ox1H1), two (Ox2H2), four (Ox4H4) and six (Ox6H6) oxime groups were synthesized and characterized by elemental analysis, FTIR, HRMS and single crystal X-ray diffraction. β-Oximinoalkylamines OxnHn act as polydentate ligands forming five-membered chelate rings, in which nickel is coordinated with both amine and oxime nitrogen atoms. In all structurally characterized complexes, OH-groups of oximes arms are involved in hydrogen bonding with counterions (Cl-), which are located in the inner or outer coordination sphere of the nickel atom. Two new structural types of pseudo-octahedral Ni(II) β-oximinoalkylamine complexes containing two ligands per one nickel ion (Ni(Ox1H1)2Cl2 and Ni(Ox 2H2)2Cl2) were identified. Dioxygen reactivity of the obtained complexes in aerobic oxidation of triphenylphosphine was studied. Bis-oxime complex Ni(Ox2H2) 2Cl2 was found to be the most active promoter of triphenylphosphine oxidation among the synthesized nickel complexes.

Item Type: Article
Subjects: C Chemical Science > Chemistry
Divisions: Department of > Chemistry
Depositing User: Arshiya Kousar
Date Deposited: 17 Jun 2019 05:21
Last Modified: 17 Jun 2019 05:21
URI: http://eprints.uni-mysore.ac.in/id/eprint/3177

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