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Synthesis of N-heterocyclic Carbene stabilized catecholatoborenium cations by ligand substitution
D.C.H. Do, S. Muthaiah, , D. Vidović
Published in American Chemical Society
2014
Volume: 33
   
Issue: 16
Pages: 4165 - 4168
Abstract
Ligand substitution is not a common procedure for the preparation of different borenium cations. This work demonstrates that the chloride ligands of several NHC-stabilized dichloroborenium cations [NHC·BCl2][X] (NHC = (R'C)2(NR)2C; 1, R = iPr, R' = H; 2, R = iPr, R' = Me; 3, R = tBu, R' = H; X = AlCl4, B(3,5-Cl2-C6H3)4) could be replaced with a catecholato moiety to produce [NHC·Bcat][X]. According to single-crystal X-ray analyses this particular ligand exchange enhanced the Lewis acidity of the target borocations with respect to the dichloro precursors. © 2014 American Chemical Society.
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