Abstract Four solvent complexes of beryllium iodide were prepared by dissolving BeI2 in N,N-dimethyl formamide (DMF), pyridine (Pyr), N-methyl pyrrolidone (NMP) and 2,6-dimethyl pyridine (2,6-lutidine, Lut). Their crystal structures were established from single crystal X-ray diffraction. For [Be(DMF)4]I2 a new modification is reported (monoclinic, space group P21/c, a = 12.491(2), b = 11.593(2), c = 15.310(3) Å, β = 94.7073(6)°). In [Be(Pyr)4]I2 (monoclinic, space group C2/c, a = 17.8799(13), b = 7.6174(5), c = 18.2611(14) Å, β = 113.508(4)°) and [Be(NMP)4]I2 (orthorhombic, space group Pbca, a = 13.941(5), b = 15.754(3), c = 24.634(7) Å) homoleptic tetrahedral complex cations are formed, while the sterically demanding solvent ligand Lut yields a neutral complex with covalently bound iodine ligands [BeI2(Lut)2] (monoclinic, space group P21/c, a = 7.8492(9), b = 24.265(3), c = 27.037(3) Å, β = 97.076(3)°). Their electrochemical stability with respect to their application as beryllium electrolytes for deposition of beryllium from solution is discussed.

中文翻译：

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β-[Be(DMF)4]I2、[Be(Pyr)4]I2、[Be(NMP)4]I2和[BeI2(Lut)2]的合成和晶体结构

摘要 将 BeI2 溶于 N,N-二甲基甲酰胺 (DMF)、吡啶 (Pyr)、N-甲基吡咯烷酮 (NMP) 和 2,6-二甲基吡啶 (2,6-二甲基甲酰胺，Lut ）。它们的晶体结构是由单晶 X 射线衍射确定的。对于 [Be(DMF)4]I2，报告了一个新的修饰（单斜，空间群 P21/c，a = 12.491(2), b = 11.593(2), c = 15.310(3) Å, β = 94.7073(6) )°)。在 [Be(Pyr)4]I2（单斜晶系，空间群 C2/c，a = 17.8799(13), b = 7.6174(5), c = 18.2611(14) Å, β = 113.508(4)°）和 [ Be(NMP)4]I2（正交，空间群 Pbca，a = 13.941(5), b = 15.754(3), c = 24.634(7) Å）形成均配四面体复合阳离子，而空间要求高的溶剂配体 Lut产生具有共价结合的碘配体 [BeI2(Lut)2]（单斜，空间群 P21/c，a = 7）的中性复合物。8492(9), b = 24.265(3), c = 27.037(3) Å, β = 97.076(3)°)。讨论了它们作为铍电解质从溶液中沉积铍时的电化学稳定性。