Chemistry of Beryllium in liquid Ammonia and the Usage of Fluoride Ion Acceptors for the Synthesis of Nitrogen Containing Compounds

在这个提议中，我们想探索铍在液氨溶液中的基本化学。此外，氟离子受体，如Be 2+，与金属氟化物的反应应该打开一个含有N和F的混合阴离子化合物的通道，并最终导致氮化物。这些含氮和氟的化合物类别-除了少数例外-是未知的。然而，它们应该具有有趣的和商业上可用的磁性，光学，甚至超导性能的氧化物，这是最容易合成的。因此，铍化合物与氨，肼，酰胺，酰亚胺和氮化物的化学反应将在固态反应以及在液氨溶液中进行探索。铍酰胺、亚胺和氮化物与各种金属氟化物反应，我们以前的工作非常成功。我们已经表明，铍阳离子可以用作液氨中的氟离子受体。这为液氨中连续的富铍化学研究扫清了道路：首次对四氨合铍阳离子进行了结构表征，并阐明了其在液氨中的水解产物。二氨合二氟铍（II）作为强氟离子受体，能够从几乎不溶的金属四氟化物中夺取氟离子。这样就形成了三氟铍酸铵（II）。

In this proposal we would like to explore the basic chemistry of beryllium in liquid ammonia solution.Additionally, the reaction of fluoride ion acceptors, like Be2+, with metal fluorides should open an access to mixed anionic compounds containing N and F, and finally lead to nitrides.These nitrogen and fluorine containing classes of compounds are - with few exceptions - unknown. However, they should feature interesting and commercially usable magnetic, optic, or even superconducting properties as the oxides do, which are most often a lot easier to synthesize.Therfore, the chemical reactions of beryllium compounds with ammonia, hydrazine, amides, imides and nitrides are to be explored in solid state reactions as well as in liquid ammonia solution. Beryllium amide, imide and nitride is to be reacted with various metal fluorides.Our previous works have been extremely successful. We have shown that the beryllium cation can be used as a fluoride ion acceptor in liquid ammonia. This cleared the way for a continuative, rich beryllium chemistry in liquid ammonia: The tetraammine beryllium cation was structurally characterized for the first time, and its hydrolysis products in liquid ammonia were elucidated.Diammine difluorido beryllium(II) acts as a strong fluoride ion acceptor as it is able to abtract a fluoride ion from the almost insoluble metal tetrafluorides. This way ammine trifluorido beryllates(II) are formed.