作者:Ramesh Karri、Mainak Banerjee、Ashish Chalana、Kunal Kumar Jha、Gouriprasanna Roy
DOI:10.1021/acs.inorgchem.7b01048
日期:2017.10.16
We also show here that the nature of the final stable cleaved products, i.e. Hg(II) complexes, depends on the X group of RHgX and the [S2]-donor ligands. For instance, the reaction of BmmMe with MeHgCl (1:1 molar ratio) afforded the formation of the 16-membered metallacyclic dinuclear mercury compound (BmmMe)2Hg2Cl4, in which the two Cl atoms are located inside the ring, whereas due to the large size
在这里我们报告[S2]供体配体BmmOH,BmmMe和BmeMe快速和可逆地结合到有机汞RHgX的汞中心,并促进RHgX的Hg-C键裂解产生稳定的四配位Hg(II)配合物和R2Hg。重要的是,Hg-C键的裂解速率主要取决于RHgX的X基团(X = BF4-,Cl-,I-)和用于诱导Hg-C键的[S2]-供体配体。例如,BmeMe诱导的MeHgI的Hg-C键断裂的初始速率几乎比BmmOH或BmmMe获得的初始速率高2倍,这表明[S2]供体的两个咪唑环之间的间隔基配体在Hg-C键的裂解中起重要作用。出奇,我们注意到,由BmeMe(或BmmMe)诱导的MeHgI的Hg-C键断裂的起始速率分别比MeHgCl和[MeHg] BF4的Hg-C键断裂的起始速率分别快10倍和100倍,在相同的反应条件下,表明[MeHg] BF4的Hg-C键在室温(21°C)下高度惰性。我们在这里还显示出最终稳定裂解产物(