Synthesis and Bond Activation Chemistry of Palladium(II) Pincer Complexes with a Weakly Coordinating Side Arm
نویسندگان
چکیده
A series of Pd(II) aryl complexes a PNO-type pincer ligand bearing weakly coordinated benzofuran side arm has been prepared. Crystallographic studies showed very long Pd–O distances more than 2.3 Å, which is significantly longer the in structurally similar PNO-Pd with an exocylic oxygen donor. and 19F NMR solution containing electron-donating (OMe) electron-withdrawing (CF3) substituents position para to atom revealed dependence interactions on nature aromatic group at Pd center. The ability influence these by changing electron density metal was demonstrated stoichiometric Sonogashira-type cross-coupling reactions between phenylacetylene, proceed via reversible aromatization/dearomatization ligand. Complexes electron-poor CF3 higher reactivity comparison their electron-neutral or -rich analogues. DFT systems provided further mechanistic insight into origin observed patterns.
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ژورنال
عنوان ژورنال: Organometallics
سال: 2022
ISSN: ['1520-6041', '0276-7333']
DOI: https://doi.org/10.1021/acs.organomet.1c00710