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Herein we present the catalytic activation of N 2 O at a Bi I ⇄Bi III redox platform. The activation of such a kinetically inert molecule was achieved by the use of bismuthinidene catalysts, aided by HBpin as reducing agent. The protocol features remarkably mild conditions (25 °C, 1 bar N 2 O), together with high turnover numbers (TON, up to 6700) and turnover frequencies (TOF). Analysis of the elementary steps enabled structural characterization of catalytically relevant intermediates after O-insertion, namely a rare arylbismuth oxo dimer and a unique monomeric arylbismuth hydroxide. This protocol represents a distinctive example of a main-group redox cycling for the catalytic activation of N 2 O.

Catalytic Activation of N2O at a Low-Valent Bismuth Redox Platform

Catalytic Activation of N₂O at a Low-Valent Bismuth Redox Platform