Formation of Organozincate Anions in LiCl-Mediated Zinc Insertion Reactions
作者:Konrad Koszinowski、Petra Böhrer
DOI:10.1021/om800947t
日期:2009.2.9
insertion reactions into various organic halides RHal were analyzed by anion-mode electrospray ionization (ESI) mass spectrometry. In all cases, organozincate anions were observed. The reactions with RHal, Hal = Br and I, yielded predominantly mononuclear complexes, such as ZnRHal2− and ZnRHalCl−, whereas for the reaction with benzylchloride abundant polynuclear organozincates, such as Zn2Bn2Cl3− and
Lithium Organozincate Complexes LiRZnX<sub>2</sub>: Common Species in Organozinc Chemistry
作者:Julia E. Fleckenstein、Konrad Koszinowski
DOI:10.1021/om200637s
日期:2011.9.26
the formation of lithium organozincates Li+RZnX2–. As the most common syntheses of RZnX reagents involve stoichiometric amounts of LiX salts, Li+RZnX2– complexes are supposedly widespread and may hold the key to understanding the marked effects of LiCl on the reactivity of organozinc halides. In contrast, we find Bu2Zn to have a much lower tendency to add LiCl and form ate complexes. This result is