作者:Jan Kahlert、Lena Böhling、Andreas Brockhinke、Hans-Georg Stammler、Beate Neumann、Louis M. Rendina、Paul J. Low、Lothar Weber、Mark A. Fox
DOI:10.1039/c5dt00758e
日期:——
to form a stable dianion on reduction. NMR spectra for the dianion [2]2− were recorded from solutions generated by reductions of 2 with alkali metals and compared with NMR spectra from reductions of 1,2-diphenyl-ortho-carborane 5. On the basis of observed and computed 11B NMR shifts, these nido-dianions contain bowl-shaped cluster geometries. The carborane is viewed as the electron-acceptor and the mesityl
两个Ç -dimesitylboryl -1,2- dicarba-闭合碳-dodecaboranes,1-(BMES 2)-2-R-1,2--C 2乙10 ħ 10(1,R = H,2,R = PH),由1,2- dicarba-的锂化合成闭合碳-dodecaborane和-1,2- dicarba- 1-苯基闭合碳-dodecaborane,分别与ñ丁基锂,并用fluorodimesitylborane随后的反应。这些新颖的化合物通过X射线晶体学进行了结构表征。长期暴露于空气中,化合物1和2会水解,得到均三甲苯和硼酸1-(B(OH)2)-2-R-1,2-C 2 B 10 H 10(3,R = H,4,R = Ph)。将氟化物阴离子添加到1和2中导致硼基-碳氢烷键裂解,得到二聚二茂铁酸HOBMes 2。在1和2处观察到了在318-333 nm处的紫外线吸收带,对应于二聚三氟甲基内部的局部π-π*跃迁,而在541-664