Synthesis of N-heterocyclic carbene stabilized catecholatoborenium cations by ligand substitution

Synthesis of N-heterocyclic carbene stabilized catecholatoborenium cations by ligand substitution

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 = AlC...

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Bibliographic Details
Main Authors: Do, Dinh Cao Huan, Muthaiah, Senthilkumar, Ganguly, Rakesh, Vidović, Dragoslav
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2014
Subjects:
DRNTU::Science::Chemistry::Organic chemistry::Organometallic compounds
Online Access:https://hdl.handle.net/10356/105349
http://hdl.handle.net/10220/20516
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Institution: Nanyang Technological University
Language: English
Description
Summary: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.

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