in organic synthesis. However, all reactions examined were performed with stoichiometric quantities of the reagent. The authors envisioned that rare earth metal alkoxides would be stronger bases than group 4 metal alkoxides due to the lower ionization potential (ca. 5.4-6.4 eV) and the lower electronegativity (1.1-1.3) of rare earth elements; thus, the catalytic use of rare earth metal alkoxides in
在最近的一篇论文中,作者报告说 Zr(Ot-Bu)sub 4} 是有机合成中一种高效且方便的碱性试剂。然而,所有检查的反应都是用
化学计量的试剂进行的。作者设想,由于稀土元素的电离势较低(约 5.4-6.4 eV)和较低的电负性(1.1-1.3),稀土
金属醇盐将是比第 4 族
金属醇盐更强的碱;因此,预计稀土
金属醇盐在有机合成中的催化用途。尽管在过去的 30 年里已经制备了多种稀土
金属醇盐,但据作者所知,关于稀土
金属醇盐的碱度的报道很少。在此处,