Copper Imidazolin-imine Coordination Compounds as Precursors for a Cu/Al Complex

The reactions of [(CF3SO3Cu)2(C6H6)] with the sterically hindered imidazolin-2-imine ligands DippImTMS (1,3-Bis­(2,6-diisopropylphenyl)-2-(trimethylsilylimino)­imidazoline) or DippImH (1,3-bis­(2,6-diisopropylphenyl) imidazolin-2-imine) lead to the formation of the linear copper­(I) complexes [Cu­(D...

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Published in:Inorganic chemistry 2024-09, Vol.63 (38), p.17331-17339
Main Authors: Antsiburov, Ivan, Stephan, Johannes, Weininger, Richard J.J., Gemel, Christian, Fischer, Roland A.
Format: Article
Language:English
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Summary:The reactions of [(CF3SO3Cu)2(C6H6)] with the sterically hindered imidazolin-2-imine ligands DippImTMS (1,3-Bis­(2,6-diisopropylphenyl)-2-(trimethylsilylimino)­imidazoline) or DippImH (1,3-bis­(2,6-diisopropylphenyl) imidazolin-2-imine) lead to the formation of the linear copper­(I) complexes [Cu­(DippImTMS)­(OTf)] (1) and [Cu­(DippImH)2]­[OTf] (2), respectively. The triflate counteranion in 2 can be easily exchanged to the weakly coordinating [BArF] giving [Cu­(DippImH)2]­[BArF] (3) (BArF = tetrakis­[3,5-bis­(trifluoromethyl)­phenyl]­borate). Substitution of the N-heterocyclic imine (NHI) ligand in 3 by AlCp* (Cp* = pentamethylcyclopentadienyl) gives the tetrahedral [Cu­(AlCp*)4]­[BArF] (5). The reaction between lithiated imidazolin-2-iminate DippImLi and CuCl results in the triangular cluster [Cu3(DippIm)2Cl] (4). All products have been fully characterized by 1H- and 13C NMR, mass spectrometry, as well as SC-XRD.
ISSN:0020-1669
1520-510X
1520-510X
DOI:10.1021/acs.inorgchem.4c02530