A safer route than that previously published for the synthesis of [BeI₂(OEt₂)₂] has been developed. Reactions of beryllium dihalide complexes [BeX₂(OEt₂)₂] (X = Br or I) with either LiMe or LiBuⁿ lead to mixtures of products, which have been shown to act as sources of ‘BeR₂’ (R = Me or Buⁿ) in previous synthetic studies. Here, a titration method has been developed to determine the quantity of metal alkyl residues in these ‘BeR₂’ mixtures that are available for subsequent alkane elimination reactions. Treating ‘BeMe₂’ mixtures with N,N,N′,N′-tetramethylethylenediamine (tmeda) gave two lithium tetramethylberyllate compounds, [{(tmeda)Li}₂(μ-BeMe₄)] and [{[(tmeda)Li](BeMe₄)(μ-Li)}_∞], which were crystallographically characterised. Treatment of in situ-generated ‘BeR₂’ solutions with several β-diketimines (HC{C(Me)=NR}{=C(Me)N(H)R}, NacnacH, R = aryl or alkyl) yielded a series of β-diketiminato beryllium alkyl complexes, [(Nacnac)BeR], including the first chiral example of such a compound. Crystallographic studies of these reveal them to be monomeric, with planar three-coordinate beryllium centres.

已经开发出比先前公开的[BeI ₂（OEt ₂）₂ ]的合成更安全的途径。的铍二卤化物配合物[BEX反应₂（OET ₂）₂ ]与任一石灰或礼部（X = Br或I）^ñ导致的产品，这已被证明作为“BER的来源的混合物₂ ”（R =我或Bu ⁿ）。在这里，已经开发出一种滴定方法来确定这些“ BeR ₂ ”混合物中可用于后续烷烃消除反应的金属烷基残基的数量。用N处理'BeMe ₂ '混合物，Ñ，N' ，Ñ 'N'-四甲基乙二胺（TMEDA），得到两个锂tetramethylberyllate化合物，[{（TMEDA）栗} ₂（μ-BEME ₄）]和[{[（TMEDA）栗（BEME ₄）（μ- Li）} _∞ ]，通过晶体学表征。用几种β-二酮亚胺（HC {C（Me）= NR} {= C（Me）N（H）R}，NacnacH，R =芳基或烷基）处理原位生成的'BeR ₂ '溶液产生了一系列β-二酮基亚甲基铍烷基配合物[（Nacnac）BeR]的合成，包括该化合物的第一个手性实例。这些晶体的晶体学研究表明它们是单体的，具有平面的三坐标铍中心。