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JOURNALS // Mendeleev Communications // Archive

Mendeleev Commun., 2021 Volume 31, Issue 3, Pages 334–336 (Mi mendc921)

This article is cited in 5 papers

Communications

Highly basic alkyl-substituted bis(benzhydryl) CaII and YbII complexes with β-CH–M agostic interactions

A. N. Selikhovab, A. V. Cherkasovb, Yu. V. Nelyubinaa, A. A. Trifonovab

a A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Moscow, Russian Federation
b G.A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, Nizhnii Novgorod, Russian Federation

Abstract: The reaction between potassium derivative {[(4-ButC6H4)2CH]K+}n and alkyl iodides gives new 1,1-bis(4-tert-butylphenyl)alkanes which can be deprotonated with BunNa to produce species [(4-ButC6H4)2CR]Na+ (R=Me, Bui). The salt metathesis of the latter with base-free CaI2 or YbI2 affords novel bis(hydrocarbyl) complexes [(4-ButC6H4)2CR]2M(TMEDA) (M=Ca, R=Me; M=Yb, R=Bui). The hyperconjugation of the central carbanion with alkyl groups pronouncedly enhances the basic properties of the compounds which would perform CH bond activation in toluene and thiophene, in distinction to the related ‘nonalkylated’ analogues with (4-ButC6H4)2CH ligand.

Keywords: rare-earth metals, alkaline earth metals, calcium complexes, ytterbium complexes, alkyl ligands, agostic interactions, CH bond activation.

Language: English

DOI: 10.1016/j.mencom.2021.04.017



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