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Issue 8, 2018
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Hidden aryl-exchange processes in stable 16e RhIII [RhCp*Ar2] complexes, and their unexpected transmetalation mechanism

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Abstract

Experiments mixing the stable 16e 5-coordinate complexes [RhCp*Ar2] (Cp* = C5Me5; Ar = C6F5, C6F3Cl2-3,5) uncover fast aryl transmetalations. Unexpectedly, as supported computationally, these exchanges are not spontaneous, but catalyzed by minute amounts of 18e (μ-OH)2[RhCp*Ar]2 as a source of 16e [RhCp*Ar(OH)]. The OH group is an amazingly efficient bridging partner to diminish the activation barrier of transmetalation.

Graphical abstract: Hidden aryl-exchange processes in stable 16e RhIII [RhCp*Ar2] complexes, and their unexpected transmetalation mechanism

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Submitted
05 Dec 2017
Accepted
27 Dec 2017
First published
02 Jan 2018

Chem. Commun., 2018,54, 984-987
Article type
Communication

Hidden aryl-exchange processes in stable 16e RhIII [RhCp*Ar2] complexes, and their unexpected transmetalation mechanism

M. N. Peñas-Defrutos, C. Bartolomé, M. García-Melchor and P. Espinet, Chem. Commun., 2018, 54, 984
DOI: 10.1039/C7CC09352G

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