Issue 30, 2022

Titanium complexes with unsymmetrically substituted imidazolin-2-iminato ligands

Abstract

The reaction of the unsymmetrical N-heterocyclic carbenes 1-(2,4,6-trimethylphenyl)-3-(adamantyl)imidazolin-2-ylidene (IAdMes, 1a) and 1-(2,6-diisopropylphenyl)-3-(adamantyl)imidazolin-2-ylidene (IAdDipp, 1b) with trimethylsilyl azide furnished the 2-(trimethylsilylimino)imidazolines 2a (ImAdMesNSiMe3) and 2b (ImAdDippNSiMe3). Desilylation by stirring in methanol gave the corresponding imidazolin-2-imines 3a (ImAdMesNH) and 3b (ImAdDippNH). 2a and 2b were treated with [TiCl4(THF)2] (THF = tetrahydrofuran) and [CpTiCl3] (Cp = η5-C5H5) to form the mono- and bis(imidazolin-2-iminato) titanium(IV) complexes [(ImAdRN)TiCl3] (4, R = Mes, Dipp), [Cp(ImAdRN)TiCl2] (5, R = Mes, Dipp), and [(ImAdRN)2TiCl2] (6, R = Mes, Dipp). The crystal structures of all compounds except 2b were determined by X-ray diffraction analysis.

Graphical abstract: Titanium complexes with unsymmetrically substituted imidazolin-2-iminato ligands

Supplementary files

Article information

Article type
Paper
Submitted
03 6 2022
Accepted
08 7 2022
First published
08 7 2022
This article is Open Access
Creative Commons BY-NC license

Dalton Trans., 2022,51, 11448-11456

Titanium complexes with unsymmetrically substituted imidazolin-2-iminato ligands

M. Koneczny, A. B. Erol, M. Mauduit, M. S. Eisen and M. Tamm, Dalton Trans., 2022, 51, 11448 DOI: 10.1039/D2DT01740G

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