Intramolecular Nucleophilic Substitution on Coordinated Borabenzenes: A New Entry into Boratabenzene Complexes
作者:Markus A. Putzer、Jonathan S. Rogers、Guillermo C. Bazan
DOI:10.1021/ja9910661
日期:1999.9.1
monoanionic 6pi} electrondonors, boratabenzene is a weaker donor. Isostructural complexes containing boratabenzene instead of Cp therefore have a greater tendency for lower oxidation states and offer altered mechanistic pathways for elementary reactions. One of the main difficulties in advancing a broader use of boratabenzene complexes in industry and in noncatalytic reactions useful for organic
Synthesis, Characterization, and Reactivity of Chromium Boratabenzene Complexes
作者:Jonathan S. Rogers、Xianhui Bu、Guillermo C. Bazan
DOI:10.1021/om0003685
日期:2000.9.1
to the reactivity observed with the isoelectronic cyclopentadienyl salts, the reaction of CrCl3(THF)3 with boratabenzene anions results in the formation of Cr(II) complexes. Thus, addition of Li(C5H5B−Me) to CrCl3(THF)3 in THF gives (C5H5B−Me)2Cr (3). Similarly, Li(C5H5B−NMe2) and CrCl3(THF)3 yield (C5H5B−NMe2)2Cr (4), while Li(C5H5B−Ph) and CrCl3(THF)3 provide (C5H5B−Ph)2Cr (5). Compounds 3−5 were characterized
与等电子式环戊二烯基盐所观察到的反应性相反,CrCl 3(THF)3与硼酸苯阴离子的反应导致形成Cr(II)络合物。因此,将Li(C 5 H 5 B-Me)添加到THF中的CrCl 3(THF)3中,得到(C 5 H 5 B-Me)2 Cr(3)。同样,Li(C 5 H 5 B-NMe 2)和CrCl 3(THF)3产生(C 5 H 5 B-NMe 2)2 Cr(4),而Li(C 5 H 5 B-Ph)和CrCl 3(THF)3提供(C 5 H 5 B-Ph)2 Cr(5)。化合物3 - 5通过单晶X射线衍射研究进行表征,并都具有典型的夹层结构。硼苯-配体加合物与合适的Cr(III)原料的反应提供了硼苯-Cr(III)配合物。在苯中的MeCrCl 2(THF)3中添加C 5 H 5 B-PMe 3(Bb -PMe 3)得到(C 5H 5 B-Me)CrCl 2(PMe 3)(6)低产率。用硼烷的吡啶加合物C
Chemistry of Borabenzene: Efficient and General Synthesis of New Neutral Borabenzene−Ligand Complexes
作者:Diego A. Hoic、Jennifer Robbins Wolf、William M. Davis、Gregory C. Fu
DOI:10.1021/om9505569
日期:1996.2.20
An array of neutral borabenzene-ligand complexes (ligand = pyridine, 2,6-lutidine, Net(3), PMe(3), CN-t-Bu) have been synthesized in three straightforward steps from commercially available 1-(trimethylsilyl)-1,4-pentadiyne. An X-ray crystal structure of borabenzene-PMe(3) is reported.