Heterometallic Mg-Ni-Mg Complex Promoted Hydrosilylation of Alkenes: Catalytic Performance and Intermediates Characterization†
Yanping Cai
Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu, 215123 China
Search for more papers by this authorShengjie Jiang
Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu, 215123 China
Search for more papers by this authorCorresponding Author
Xin Xu
Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu, 215123 China
E-mail: [email protected]Search for more papers by this authorYanping Cai
Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu, 215123 China
Search for more papers by this authorShengjie Jiang
Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu, 215123 China
Search for more papers by this authorCorresponding Author
Xin Xu
Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu, 215123 China
E-mail: [email protected]Search for more papers by this author† Dedicated to the Special Issue of Emerging Investigators in 2024.
Comprehensive Summary
Heteronuclear metal complexes have played an increasingly important role in both small molecules activation and catalytic transformation due to the potential metal-metal synergies. In this work, we reported that the well-defined Mg-Ni-Mg complex [(LMg)2Ni(C2H4)2] {L = [(DippNCMe)2CH]−, Dipp = 2,6-iPr2C6H3} was capable of catalyzing the conversion of a diverse array of terminal alkenes to hydrosilylated products in anti-Markovnikov fashion using PhSiH3 as the silicon source. The stoichiometric reaction of heterometallic Mg-Ni-Mg complex with one equivalent PhSiH3 obtained a silyl-nickel-monohydride complex [(LMg)2NiH(C2H4)(SiHPhEt)] featuring a Ni-Si-H-Mg interaction. Moreover, treatment of heterometallic Mg-Ni-Mg complex with three equivalents PhSiH3 provided the silyl-nickel-trihydride complex [(LMg)2NiH3(SiHPhEt)] with three hydride-bridged at Mg-Ni-Mg fragment. Further reactions of the resultant silyl-nickel complexes with alkenes, e.g., ethylene and styrene, yielded the corresponding alkene-coordinated Mg-Ni-Mg complexes [(LMg)2Ni(C2H4)2], [(LMg)2NiH2(C2H4)] and [(LMg)2NiH2(CH2CHPh)], respectively, with the elimination of PhEtSiH2. Based on the control experiments, both silyl-nickel-monohydride and silyl-nickel-trihydride complexes were considered as active intermediates in the catalytic hydrosilylation reaction.
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