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- W2898054503 abstract "A phosphinite-based dinickel pincer complex, {2,3,5,6-(iPr2PO)4C6}Ni2Cl2, is synthesized by heating a mixture of 1,2,4,5-tetrahydroxybenzene, iPr2PCl, NiCl2, and Et3N at 150 °C in a microwave reactor or refluxing 1,2,4,5-(iPr2PO)4C6H2 with NiCl2 and Et3N at 175–250 °C in a flask. Substitution of chlorides by hydrides (from LiAlH4 or LiEt3BH) and methyl groups (from MeLi) generates {2,3,5,6-(iPr2PO)4C6}Ni2H2 and {2,3,5,6-(iPr2PO)4C6}Ni2Me2, respectively. Protonation of the methyl complex with HCO2H gives {2,3,5,6-(iPr2PO)4C6}Ni2(OCHO)2. Spectroscopic and crystallographic data of these Janus POCOP pincer complexes are compared to those of the analogous mononuclear complexes {2,6-(iPr2PO)2C6H3}NiX (X = Cl, H, Me, and OCHO). The hydride complex {2,3,5,6-(iPr2PO)4C6}Ni2H2 reacts with phenylacetylene and CO2 to give insertion products. It also catalyzes the reduction of CO2 with catecholborane (HBcat) to yield CH3OBcat and catBOBcat with a turnover frequency of 7.5 min–1. The stoichiometric and catalytic activities of {2,3,5,6-(iPr2PO)4C6}Ni2H2 are compared to those of {2,6-(iPr2PO)2C6H3}NiH." @default.
- W2898054503 created "2018-10-26" @default.
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- W2898054503 date "2018-10-22" @default.
- W2898054503 modified "2023-10-18" @default.
- W2898054503 title "Janus POCOP Pincer Complexes of Nickel" @default.
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- W2898054503 doi "https://doi.org/10.1021/acs.organomet.8b00619" @default.
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