A silylene-stabilized distannavinylidene with a highly labile substituent  

作　　者：Zihao Qiao Ming Chen Zhenbo Mo 

机构地区：[1]State Key Laboratory and Institute of Elemento-Organic Chemistry,Frontiers Science Center for New Organic Matter,College of Chemistry,Nankai University,Tianjin 300071,China

出　　处：《Science China Chemistry》2023年第12期3555-3561,共7页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China(22071124,22371130,22221002);the Frontiers Science Center for New Organic Matter at Nankai University(C029215001);the Fundamental Research Funds for the Central Universities(63206007);the Nankai University and Young Elite Scientists Sponsorship Program by Tianjin。

摘　　要：Vinylidene and its heavier analogues are fundamentally important in synthetic chemistry,but their stabilization and structural characterization remains extremely challenging.Herein we describe that the reduction of an NHSi-stabilized stannyl-stannylene(2)with one molar equivalent of[(^(Mes)Nacnac)Mg]_(2)affords an NHSi-stabilized distannavinylidene(3).Single-crystal X-ray crystallography and density functional theory(DFT)calculations show that compound 3 features a pronounced Sn=Sn double bond and one lone pair of electrons at the two-coordinate Sn atom.Most strikingly,3 undergoes an interconversion with distannyne(4)upon the addition and removal of one molar equivalent of N-heterocyclic carbene.Compound 3 readily reacts with Ph_(2)C=C=O,Ad C≡P and(Al Cp^(*))_(4)to give the structurally interesting stannacycles(5,6)and an aluminyl distannyne(7),demonstrating its unique reactivity derived from the high substituent lability.

关 键 词：distannavinylidene SILYLENES stannacycles distannyne CARBORANES 

分 类 号：O623.121[理学—有机化学]