Fig. 4: Mechanistic investigation. | Nature Communications

Fig. 4: Mechanistic investigation.

From: Rapid and scalable photocatalytic C(sp2)–C(sp3) Suzuki−Miyaura cross-coupling of aryl bromides with alkyl boranes

Fig. 4

A Results of NMR complexation studies disproving Lewis acid-base adduct with 2,6-lutidine. B Electronic-Paramagnetic Resonance (EPR) results. CW X-Band EPR spectrum of catalytic mixture in 5:1 PrCN:MeCN at 10 K, after 30 s irradiation with blue light (Mw Freq = 9.6503 GHz). Experimental spectrum (black), simulated spectrum of a paramagnetic Ni species (blue, S = 1/2, g = [2.265 2.23 2.047]), simulated spectrum 4CzIPN radical anion (red, S = 1/2, giso = 2.002). L1: 4,4′-di-tert-butyl-2,2′-dipyridyl; L2: 6,6′-dimethyl-2,2′-dipyridyl. C Control experiments. D Effect of the ligand on the reaction outcome. E Proposed mechanism.

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