Heteroleptic stannylenes,featuring pendant hemilabile iminophosphorane functionalities and kinetically stabilizing terphenyl ligands,were synthesized straightforwardly through formal C-H activation.Subsequently,they w...Heteroleptic stannylenes,featuring pendant hemilabile iminophosphorane functionalities and kinetically stabilizing terphenyl ligands,were synthesized straightforwardly through formal C-H activation.Subsequently,they were investigated for their ability to activate ammonia through N-H bond scission.By combining synthetic modifications of the ancillary ligand framework and computational analyses,detailed insights into the mechanism of NH_(3) activation by these systems were obtained,highlighting an activation pathway at tin without a change in oxidation state.Additionally,an observed by-product during these studies underscores the non-innocence of a lithium salt in the synthesis of the stannylene starting materials,providing access to a novel lithium stannylenoid.展开更多
Comprehensive Summary For coordination-insertion olefin polymerization,the development of novel transition-metal catalysts has drawn extensive attention in this field.In this contribution,we designed a series of hemil...Comprehensive Summary For coordination-insertion olefin polymerization,the development of novel transition-metal catalysts has drawn extensive attention in this field.In this contribution,we designed a series of hemilabileα-diimine nickel catalysts bearing oxygen atom as neighboring group.The steric hindrance and oxygen atom number of these nickel complexes(Ni1—Ni4)could be adjusted,which influenced ethylene(co)polymerization processes.展开更多
文摘Heteroleptic stannylenes,featuring pendant hemilabile iminophosphorane functionalities and kinetically stabilizing terphenyl ligands,were synthesized straightforwardly through formal C-H activation.Subsequently,they were investigated for their ability to activate ammonia through N-H bond scission.By combining synthetic modifications of the ancillary ligand framework and computational analyses,detailed insights into the mechanism of NH_(3) activation by these systems were obtained,highlighting an activation pathway at tin without a change in oxidation state.Additionally,an observed by-product during these studies underscores the non-innocence of a lithium salt in the synthesis of the stannylene starting materials,providing access to a novel lithium stannylenoid.
基金supported by National Key R&D Program of China(No.2021YFA1501700)Natural Science Foundation of Anhui Province(2308085Y35,2023AH030002)+2 种基金Hefei Natural Science Foundation(202304)CAS Project for Young Scientists in Basic Research(No.YSBR-094)2023 Youth Innovation Foundation ofUniversity of Science and Technologyof China(WK2060000074).
文摘Comprehensive Summary For coordination-insertion olefin polymerization,the development of novel transition-metal catalysts has drawn extensive attention in this field.In this contribution,we designed a series of hemilabileα-diimine nickel catalysts bearing oxygen atom as neighboring group.The steric hindrance and oxygen atom number of these nickel complexes(Ni1—Ni4)could be adjusted,which influenced ethylene(co)polymerization processes.
