Al–Sc Bonded Complexes: Synthesis, Structure, and Reaction with Benzene in the Presence of Alkyl Halide
作者:Genfeng Feng、Ka Lok Chan、Zhenyang Lin、Makoto Yamashita
DOI:10.1021/jacs.2c09746
日期:2022.12.14
An alumanyl anion possessing N,N′-bis(2,6-diisopropylphenyl)-1,3-propanediamine ligand was synthesized and characterized. Transmetalation of this Al anion with diaminoscandium chloride precursors afforded the corresponding Al–Sc complexes possessing an unprecedented Al–Sc bond. The Al–Sc[N(SiMe3)2] complex underwent intramolecular C–H cleavage to form a bridged dinuclear complex with μ-hydrido and
合成并表征了具有N,N'-双(2,6-二异丙基苯基)-1,3-丙二胺配体的铝氨酰基阴离子。该 Al 阴离子与二氨基氯化钪前体的金属转移反应提供了相应的具有前所未有的 Al-Sc 键的 Al-Sc 配合物。Al–Sc[N(SiMe 3 ) 2 ] 复合物经历分子内 C–H 裂解,形成具有 μ-氢和 μ-亚甲基配体的桥联双核复合物。Al–Sc( Ni Pr 2 ) 2络合物在烷基溴存在下与苯反应,得到 1,4-二铝化环己二烯产物,同时形成烷基-烷基偶联产物。尽管后一种产物似乎是通过自由基机制形成的,但 DFT 计算揭示了涉及双金属反应途径与烷基溴和苯反应的离子机制,这为金属-金属键合化合物的化学提供了新的见解。