作者:Chunfang Jiang、Olivier Blacque、Thomas Fox、Heinz Berke
DOI:10.1021/om100951a
日期:2011.4.25
[DMPH][HB(C6F5)3], 1b. FLPs, derived from B(C6F5)3 and the bulky Lewis bases 2,2,6,6-tetramethylpiperidine (TMP) and 1,2,2,6,6-pentamethylpiperidine (PMP), could also heterolytically activate H2, affording the salts [TMPH][HB(C6F5)3], 2, and [PMPH][HB(C6F5)3], 3, respectively. In a VT NMR study the TMP/B(C6F5)3 reaction was studied in greater detail, trying to trace intermediates. The supposed most prominent
路易斯酸B的处理(C 6 ˚F 5)3与路易斯碱的2,6-二甲基哌啶(DMP)导致经典路易斯酸的形成·碱加合物DMP - B(C 6 ˚F 5)3,1A,预计会发生热解离到“未淬灭”的Lewis中心。游离的路易斯对能够形成受阻的路易斯对(FLP),后者诱导H 2的杂合裂解,从而提供离子产物[DMPH] [HB(C 6 F 5)3 ],1b。源自B(C 6 F 5)的FLP3和笨重的Lewis碱2,2,6,6-四甲基哌啶(TMP)和1,2,2,6,6-五甲基哌啶(PMP),也可以杂化活化H 2,得到盐[TMPH] [HB( C 6 F 5)3 ],2和[PMPH] [HB(C 6 F 5)3 ],3。在VT NMR研究中,对TMP / B(C 6 F 5)3反应进行了更详细的研究,试图追踪中间体。假定的最突出的中间体TMP / H 2 / B(C 6 F 5)3复杂,但是,无法检测到。B(C