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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >N-Methylimidazole complexes of beryllium: [Be(Me-Im)_4]I _2and [Be_3(μ-OH)_3(Me-Im)_6]Cl _3
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N-Methylimidazole complexes of beryllium: [Be(Me-Im)_4]I _2and [Be_3(μ-OH)_3(Me-Im)_6]Cl _3

机译：铍的N-甲基咪唑配合物：[Be（Me-Im）_4] I _2和[Be_3（μ-OH）_3（Me-Im）_6] Cl _3

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摘要

Tetra(N-methylimidazole)-beryllium-di-iodide, [Be(MeIm)_4]I _2 (1), was prepared from beryllium powder and iodine in Nmethylimidazole suspension to give yellow single crystal plates, which were characterized by X-ray diffraction and IR spectroscopy. Compound 1 crystallizes tetragonally in the space group IA2d with, four formula units per unit cell. Lattice dimensions at 100(2) K: a = b = 1784.9(1), c = 696.2(1) pm, R _1 = 0.0238. The structure consists of homoleptic dications [Be(Me-Im)_4]~(2+) with short Be-N distances of 170.3(3) pm and iodide ions with weak interionic C-H?I contacts. Experiments to yield crystalline products from reactions of N-methylimidazole with BeCl_2 and (Ph_4P)_2[Be_2Cle], respectively, in dichloromethane solutions were unsuccessful. However, single crystals of [Be_3(μ-OH)_3(Me-Im)_6]Cl_3 (2) were obtained from these solutions in the presence of moisture air. According to X-ray diffraction studies, two different crystal individuals (2a and 2b) result, depending on the starting materials BeCl_2 and (Ph _4P)2[Be_2Cl_6], respectively [2a: Space group P2_1, Z=4; 2b: Space group P1, Z = 2], As a side-product from, the reaction, of N-methylimidazole with (Ph_4P)_2[Be _2Cl_6 single crystals of (Ph_4P)Cl·- CH_2Cl_2 (3) were identified crystallographically (P2 _1, Z = 4) which are isotypical with the corresponding known bromide (Ph_4P)Br·CH_2Cl_2.
机译：由铍粉和碘在N-甲基咪唑悬浮液中制备四（N-甲基咪唑）-铍二碘化物[Be（MeIm）_4] I _2（1），得到黄色单晶板，通过X射线表征衍射和红外光谱。化合物1在空间基团IA2d中四方结晶，每个晶胞具有四个分子式。 100（2）K时的晶格尺寸：a = b = 1784.9（1），c = 696.2（1）pm，R _1 = 0.0238。该结构由具有130.3（3）pm的短Be-N距离的均相指示[Be（Me-Im）_4]〜（2+）和具有弱离子间C-H2I接触的碘离子组成。 N-甲基咪唑分别与BeCl_2和（Ph_4P）_2 [Be_2Cle]在二氯甲烷溶液中反应生成晶体产物的实验失败。然而，在湿空气存在下，从这些溶液中获得了[Be_3（μ-OH）_3（Me-Im）_6] Cl_3（2）的单晶。根据X射线衍射研究，分别根据起始材料BeCl_2和（Ph _4P）2 [Be_2Cl_6]得出两个不同的晶体个体（2a和2b）[2a：空间群P2_1 / n，Z = 4; 2b：空间群P1，Z = 2]，从结晶学上鉴定了N-甲基咪唑与（Ph_4P）_2 [Be _2Cl_6（Ph_4P）Cl·-CH_2Cl_2（3）的单晶反应P2 _1 / n，Z = 4）与相应的已知溴化物（Ph_4P）Br·CH_2Cl_2同型。

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