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• W2512431350 endingPage "4330" @default.
• W2512431350 startingPage "4323" @default.
• W2512431350 abstract "A new class of planar chiral heteroatom-bridged biferrocene species was prepared using (pR,pR,SS,SS)-2,2″-bis(p-tolylsulfinyl)-1,1″-biferrocene (pR,pR,SS,SS)-2 as a readily accessible precursor. Initially, one of the sulfinate groups in compound 2 is replaced with a trimethylstannyl or dimesitylboryl group. Replacement of the second sulfinate group with t-BuLi then results in cyclization to give the Me2Sn-bridged species (pS,pS)-4Sn and the Mes2B-bridged borate anion [(pS,pS)-4B]−. The products are redox active, as cyclic and square wave voltammetry data of (pS,pS)-4Sn and [Li(12-c-4)2][(pS,pS)-4B] reveal two separate reversible oxidation events. The mixed-valent species [(pS,pS)-4Sn]+ and (pS,pS)-4B can also be obtained by chemical oxidation with AgPF6 or by simple exposure to air, respectively. A comparison of X-ray crystal structures reveals that the oxidized (mixed-valent) species contain distinct Fe(II) and Fe(III) sites, but UV–visible–NIR spectra display IVCT bands at ca. 4000 and 5000 cm–1, indicative of electronic coupling in solution. All compounds are obtained in enantiomerically pure form, suggesting potential use as switchable chiral anions and cations." @default.
• W2512431350 created "2016-09-16" @default.
• W2512431350 creator A5030225075 @default.
• W2512431350 creator A5040146694 @default.
• W2512431350 creator A5049669208 @default.
• W2512431350 creator A5067894921 @default.
• W2512431350 date "2015-08-25" @default.
• W2512431350 modified "2023-09-25" @default.
• W2512431350 title "Redox-Switchable Chiral Anions and Cations Based on Heteroatom-Fused Biferrocenes" @default.
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• W2512431350 doi "https://doi.org/10.1021/acs.organomet.5b00577" @default.
• W2512431350 hasPublicationYear "2015" @default.
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