The Synthesis of B<sub>2</sub>(SIDip)<sub>2</sub>and its Reactivity Between the Diboracumulenic and Diborynic Extremes
作者:Julian Böhnke、Holger Braunschweig、Theresa Dellermann、William C. Ewing、Kai Hammond、J. Oscar C. Jimenez-Halla、Thomas Kramer、Jan Mies
DOI:10.1002/anie.201506368
日期:2015.11.9
properties between those of L‐B2‐L compounds stabilized by CAAC and IDip. Reactions of all three L‐B2‐L compounds with CO demonstrate the differences caused by their respective ligands, as the π‐acidities of the CAAC and SIDip carbenes enabled the isolation of bis(boraketene) compounds (L(OC)B‐B(CO)L), which could not be isolated from reactions with B2(IDip)2. However, only B2(IDip)2 and B2(SIDip)2 could
合成,分离并表征了一种新的式L-B 2 -L的化合物,其中稳定配体(L)为1,3-双[二异丙基苯基] -4,5-二氢咪唑-2-亚烷基(SIDip)。SIDip配体的π酸度,介于相对非酸性的IDip(1,3-双[二异丙基苯基]咪唑-2-亚基)配体与酸性更高的CAAC(1 [[2,6-二异丙基苯基])之间‐3,3,5,5-四甲基吡咯烷二-2-亚基)配体产生了一种具有光谱,电化学和结构特性的化合物,这些化合物在CAAC和IDip稳定的L‐B 2 ‐ L化合物之间具有。所有三个L–B 2的反应带有CO的‐L化合物表现出由各自配体引起的差异,因为CAAC和SIDip碳苯的π酸可分离出双(硼烯)化合物(L(OC)B‐B(CO)L),从而可以不能从与B 2(IDip)2的反应中分离出来。但是,只有B 2(IDip)2和B 2(SIDip)2可以转化为双环双(硼烷内酯)化合物。