The methylidene scandium complex (PNP)Sc(mu3-CH2)(mu2-CH3)2[Al(CH3)2]2 (PNP = N[2-P(CHMe2)2-4-methylphenyl]2-) can be prepared from the reaction of (PNP)Sc(CH3)2 and 2 equiv of Al(CH3)3. The Lewis acid stabilized methylidenes candium complex has been crystallographically characterized, and its bonding scheme analyzed by DFT. In addition, we report preliminary reactivity studies of the Sc-CH2 ligand with substrates such as H2NAr and OCPh2. While the former results in an Brønsted acid-base reaction, the latter reagent produces the olefin H2C CPh2 along with the novel oxoscandium complex (PNP)Sc(mu3-O)(mu2-CH3)2[Al(CH3)2]2, quantitatively.

中文翻译：

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路易斯酸稳定的亚甲基和氧钪配合物

亚甲基钪络合物(PNP)Sc(mu3-CH2)(mu2-CH3)2[Al(CH3)2]2 (PNP = N[2-P(CHMe2)2-4-methylphenyl]2-)来自 (PNP)Sc(CH3)2 和 2 当量的 Al(CH3)3 的反应。路易斯酸稳定的亚甲基钆络合物已被晶体学表征，并通过 DFT 分析了其键合方案。此外，我们报告了 Sc-CH2 配体与底物如 H2NAr 和 OCPh2 的初步反应性研究。前者导致 Brønsted 酸碱反应，后者产生烯烃 H2C CPh2 以及新型氧钪络合物 (PNP)Sc(mu3-O)(mu2-CH3)2[Al(CH3)2]2，数量上。