this detailed study we report on the structures of the widely employed diboron(4) compounds bis(pinacolato)diboron (B2pin2) and bis(neopentyl glycolato)diboron (B2neop2), as well as bis(ethylene glycolato)diboron (B2eg2) and tetrakis(dimethylamino)diboron (B2(NMe2)4), and their reactivity, along with that of bis(catecholato)diboron (B2cat2) with backbone saturated and backbone unsaturared N-heterocyclic
在这项详细的研究中,我们报告了广泛使用的diboron(4)化合物bis(pinacolato)diboron(B 2 pin 2)和bis(neopentylglycerato)diboron (B 2 neop 2)以及bis(ethylglycolato )的结构。 )二
硼(B 2例如2)和四(二甲基
氨基)二
硼(B 2(NMe 2)4),以及它们与双(
邻苯二酚)二
硼(B 2 cat 2)具有不同空间需求的主链饱和和主链不饱和N-杂环卡宾(NHC)。根据diboron(4)化合物和所用NHC的性质,已观察到由B–B和C–N键活化产生的Lewis酸/ Lewis碱加合物或NHC扩环产物。分离出相应的NHC加合物和NHC扩环产物,并通过固态和溶液NMR光谱法以及X射线衍射对其进行表征。通常,我们观察到低温下B 2例如2的B–B键和C–N键的活化,在B 2 neop 2的室温下和在B 2 cat