Reactions of alkali metal diphenylmethanides [(3,5-Bu2t-2-MeO-C6H2)2CH]M (M = Li, K) with LnCl3. The synthesis and structure of the complex [(3,5-Bu2t-2-MeO-C6H2)2CH]2ScCl
D. O. Khristolyubov, D. M. Lyubov, A. V. Cherkasov, G. K. Fukin, A. A. Trifonov
Российский химический вестник
https://doi.org/10.1007/s11172-021-3322-0
The outcome of the exchange reactions of alkali metal diphenylmethanides [(3,5-Bu2t-MeO-C6H2)2CH]M (M = Li (2), K (3)) with LnCl3 is determined by the nature of the rare-earth metal. In the case of ScCl3(THF)3, the reactions (the molar ratio is 2:1) afford the complex [(3,5-Bu2t-2-MeO-C6H2)2CH]2ScCl (4). The reaction of YCl3 with compound 3 is accompanied by the C-O bond cleavage of the diphenylmethanide ligand to form new diphenylmethane (3,5-Bu2t-2-MeO-C6H2)2CHMe (5). For Yb and Sm with a stable divalent state, the exchange reactions of LnCl3 with compound 3 are accompanied by oxidative dimerization of diphenylmethanide carbanions and the elimination of 1,1,2,2-tetraarylethane [(3,5-Bu2t-2-MeO-C6H2)2CH]2 (6). According to the X-ray diffraction data, the diphenylmethanide ligands in compound 4 are bidentate and are coordinated to the Sc3+ ion in a κ2-CO mode.
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