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• W2335726602 endingPage "4538" @default.
• W2335726602 startingPage "4526" @default.
• W2335726602 abstract "A novel pincer ligand based on the pyrazine backbone (PNzP) has been synthesized, (2,6-bis(di(tert-butyl)phosphinomethyl)pyrazine), tBu-PNzP. It reacts with FeBr2 to yield [Fe(Br)2(tBu-PNzP)], 1. Treatment of 1 with NaBH4 in MeCN/MeOH gives the hydride complex [Fe(H)(MeCN)2(tBu-PNzP)][X] (X = Br, BH4), 2·X. Counterion exchange and exposure to CO atmosphere yields the complex cis-[Fe(H)(CO)(MeCN)(tBu-PNzP)][BPh4] 4·BPh4, which upon addition of Bu4NCl forms [Fe(H)(Cl)(CO)(tBu-PNzP)] 5. Complex 5, under basic conditions, catalyzes the hydrogenation of CO2 to formate salts at low H2 pressure. Treatment of complex 5 with a base leads to aggregates, presumably of dearomatized species B, stabilized by bridging to another metal center by coordination of the nitrogen at the backbone of the pyrazine pincer ligand. Upon dissolution of compound B in EtOH the crystallographically characterized complex 7 is formed, comprised of six iron units forming a 6-membered ring. The dearomatized species can activate CO2 and H2 by metal–ligand cooperation (MLC), leading to complex 8, trans-[Fe(PNzPtBu-COO)(H)(CO)], and complex 9, trans-[Fe(H)2(CO)(tBu-PNzP)], respectively. Our results point at a very likely mechanism for CO2 hydrogenation involving MLC." @default.
• W2335726602 created "2016-06-24" @default.
• W2335726602 creator A5005143072 @default.
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• W2335726602 creator A5071445861 @default.
• W2335726602 creator A5081692819 @default.
• W2335726602 creator A5086773368 @default.
• W2335726602 date "2015-04-14" @default.
• W2335726602 modified "2023-10-11" @default.
• W2335726602 title "Synthesis and Reactivity of Iron Complexes with a New Pyrazine-Based Pincer Ligand, and Application in Catalytic Low-Pressure Hydrogenation of Carbon Dioxide" @default.
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• W2335726602 doi "https://doi.org/10.1021/acs.inorgchem.5b00366" @default.
• W2335726602 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25871886" @default.
• W2335726602 hasPublicationYear "2015" @default.
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