Active Iron(II) Catalysts toward <i>gem</i>-Specific Dimerization of Terminal Alkynes

We report the syntheses and catalytic activity of a series of piano-stool iron complexes with the general formula [FeClCp*­(NHC)] (where NHC = N-heterocyclic carbene) toward the gem-specific dimerization of terminal alkynes. In comparison to our first-generation catalyst, the newly synthesized catalyst is more active and features the same geminal specificity. Both the experimental and computational data are presented herein.本文报道了一系列通式为[FeClCp*(NHC)]的钢琴椅型铁配合物的合成及其催化活性，其中NHC为氮杂环卡宾（N-heterocyclic carbene, NHC），该类配合物可催化末端炔烃发生gem-专一性二聚反应。相较于本研究的第一代催化剂，新合成的催化剂活性更为优异，且保持了相同的偕区域专一性。本文同时呈现了相关实验与计算数据。