Add time:08/31/2019         Source:sciencedirect.com

Attempts to synthesize the sterically crowded complexes (C5Me5)3Ln of the smallest lanthanide metals, Ln = Tm, and Lu, from (C5Me5)2Ln(μ-Ph)2BPh2 and KC5Me5 via mechanochemical methods has revealed C–H bond activation chemistry: the tuckover hydride complexes, (C5Me5)2Ln(μ-H)(μ-η1:η5-CH2C5Me4)Ln(C5Me5), were observed in low crystalline yields. In the case of Ln = Yb, attempts to synthesize the cationic precursor, (C5Me5)2Yb(μ-Ph)2BPh2, from the reaction of (C5Me5)2Yb(η3-C3H5) and [HNEt3][BPh4] led to the reduction of the metal and the formation of the Yb(II) cationic complex, (C5Me5)Yb(μ-Ph)2BPh2.

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