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Issue 24, 2018
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Acetylacetonato-based pincer-type nickel(ii) complexes: synthesis and catalysis in cross-couplings of aryl chlorides with aryl Grignard reagents

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Abstract

In this work, three different types of acetylacetonato-based pincer-type nickel(II) complexes (2) were prepared. Complex 2a possessed the tridentate ONN ligand, which was constructed by the condensation reaction of acetylacetone with N,N-diethylethylenediamine. Complex 2b contained the PPh2 donor group in contrast to the NEt2 group in 2a, i.e., an ONP ligand framework. Complex 2c was composed of the NNN ligand, which was prepared by the reaction of 4-((2,4,6-trimethylphenyl)amino)pent-3-en-2-one with N,N-diethylethylenediamine. In addition to X-ray diffraction analysis, these complexes were characterized spectroscopically. Their catalytic activity for a cross-coupling reaction of aryl halides with aryl Grignard reagents was also evaluated. Among these complexes, 2b acted as an effective catalyst for the cross-coupling reaction using aryl chlorides as electrophiles. The electronic properties of these Ni(II) complexes were investigated by cyclic voltammetry and density functional theory calculations.

Graphical abstract: Acetylacetonato-based pincer-type nickel(ii) complexes: synthesis and catalysis in cross-couplings of aryl chlorides with aryl Grignard reagents

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Publication details

The article was received on 03 Apr 2018, accepted on 25 May 2018 and first published on 29 May 2018


Article type: Paper
DOI: 10.1039/C8DT01295D
Dalton Trans., 2018,47, 8003-8012

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    Acetylacetonato-based pincer-type nickel(II) complexes: synthesis and catalysis in cross-couplings of aryl chlorides with aryl Grignard reagents

    E. Asano, Y. Hatayama, N. Kurisu, A. Ohtani, T. Hashimoto, Y. Kurihara, K. Ueda, S. Ishihara, H. Nagao and Y. Yamaguchi, Dalton Trans., 2018, 47, 8003
    DOI: 10.1039/C8DT01295D

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