A binuclear guanidinate yttrium carbyne complex: unique reactivity toward unsaturated C–N, C–O and C–S bonds

Abstract

A guanidinato-stabilized binuclear yttrium carbyne complex [(PhCH2)2NC(NC6H3iPr2-2,6)2]2Y2(µ2-Me)(AlMe3)2(µ4-CH) (1) was synthesized via C−H bond activation and its versatile reactivities were investigated. Complex 1 underwent σ-bond metathesis with PhSSPh and nucleophilic addition...

Rare-earth metal ethylene and ethyne complexes

“…Impressive progress has been witnessed in the development of the design and synthesis of new rare-earth alkyl complexes in the last few decades owing to their high activity in a wide range of stoichiometric and catalytic reactions. 1–3 However, studies on the alkylidene and alkylidyne complexes are limited due to the HOMO/LUMO orbital energy mismatch between the rare-earth metal ions and carbon-centered orbitals, 4–12 among which the deprotonation of AlMe 3 and thermally induced methyl ligand degradation have been proven to be effective ways for the generation of CH 2 2− and CH 3− moieties. However, to our knowledge, compared to methyl congeners, only a few examples of rare-earth ethyl complexes and their derivatives have been isolated and structurally authenticated.…”