Issue 33, 2020

Group 13-derived radicals from α-diimines via hydro- and carboalumination reactions

Abstract

The mechanochemical synthesis of tertiary and secondary alanes AlR3 (R = Np 1 or Mes 2; HAlR2 R = Np 3 or Mes 4) is described. These species are reacted with several α-diimines to give a series of aluminium-derived radicals of the form [(diimine)AlR2]˙ (6–11). EPR and several crystallographic studies are reported. These species are thought to form via hydro- or carboalumination and subsequent elimination reactions. This view is supported by the structural data for minor products C12H7(NHDipp)(NDipp)AliBu25 and C13H8(C(iBu)[double bond, length as m-dash]N(m-Xy)(NH(m-Xy)))AliBu212. In addition, the characterization of (C6F5)2B(OC(C6F5)OC12H8) indicates that such a carboboration pathway also provides access to related boron-derived radicals.

Graphical abstract: Group 13-derived radicals from α-diimines via hydro- and carboalumination reactions

Supplementary files

Article information

Article type
Paper
Submitted
15 Maw 2020
Accepted
06 Mha 2020
First published
07 Mha 2020

Dalton Trans., 2020,49, 11689-11696

Group 13-derived radicals from α-diimines via hydro- and carboalumination reactions

A. Bodach, K. L. Bamford, L. E. Longobardi, M. Felderhoff and D. W. Stephan, Dalton Trans., 2020, 49, 11689 DOI: 10.1039/D0DT02498H

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