Synthesis and Structure of Melamium Bromide C 66 N 1111 H 1010 Br and Melamium Iodide C 66 N 1111 H 1010 I

Kessler Fabian K.; Koller Thadd?us J.; Schnick Wolfgang

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Synthesis and Structure of Melamium Bromide C ₆6 N ₁₁11 H ₁₀10 Br and Melamium Iodide C ₆6 N ₁₁11 H ₁₀10 I

机译：蛋白石溴化镁的合成和结构C _{6 6n _{11 11h _{10 10 br和蛋白质C _{6 6 n _{11 11 h _{10 10 i}}}}}}

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> Melamium bromide and melamium iodide were synthesized from dicyandiamide in the presence of ammonium halides in evacuated Duran glass ampoules at temperatures of 450 °C. The crystal structures of both compounds were obtained from single‐crystal X‐ray diffraction. Melamium bromide C ₆ N ₁₁ H ₁₀ Br crystallizes in space group P 2 ₁ / n [no. 14, a = 7.0500(5), b = 28.7096(18), c = 10.8783(8) ?, β = 96.060(2)°, Z = 8, wR ₂ = 0.2231] and exhibits a layer‐like arrangement of melamium ions, wherein both planar as well as twisted molecular structures of the cations occur. Melamium iodide C ₆ N ₁₁ H ₁₀ I crystallizes in space group P 2 ₁ / c [no. 14, a = 6.8569(3), b = 11.9949(6), c = 14.0932(6) ?, β = 97.613(2)°, Z = 4, wR ₂ = 0.0654], however in a structure completely different from the one of melamium bromide. The melamium iodide structure is comprised of stacks of planar melamium ions that form complex, hydrogen‐bonded network layers with iodide ions within the layers. Both compounds were further characterized by FTIR spectroscopy, mass spectrometry, and elemental analyses. Melamium bromide and melamium iodide could be obtained as air stable and colorless crystals. Samples are crystallographically phase pure as shown by Rietveld refinement.

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溴化胺和蛋白质碘化物在450℃的温度下在卤化物中的卤化物存在下用双卤化物合成。两种化合物的晶体结构由单晶X射线衍射获得。溴化胺C _{6 N _{11 H _{10 Br在空间组中结晶 p 1 / n [否。 14， a = 7.0500（5）， B = 28.7096（18）， C = 10.8783（8）？，β = 96.060（2）°， z = 8， wr _{2 = 0.2231]并且表现出蛋白质离子的层状布置，其中阳离子的平面和扭曲的分子结构发生。蛋白质碘化物C _{6 N _{11 H _{10 I在空间组中结晶 p 1 / c [否。 14， a = 6.8569（3）， B = 11.9949（6）， C = 14.0932（6）？，β = 97.613（2）°， z = 4， Wr _{2 = 0.0654]，但在一个完全不同的结构中溴化胺。蛋白质碘化物结构由堆叠的平面蛋白质离子组成，其形成复合的氢键合网络层，其在层内碘离子。通过FTIR光谱，质谱和元素分析进一步表征了两种化合物。溴化葡萄溴化胺和蛋白质碘化物可以作为空气稳定和无色晶体获得。样品在rietveld改进所示的情况下是晶形相位纯度。
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《Zeitschrift fur Anorganische und Allgemeine Chemie》 |2018年第3期|共7页
作者
Kessler Fabian K.; Koller Thadd?us J.; Schnick Wolfgang;
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Department of ChemistryUniversity of Munich (LMU)81377 Munich Germany;

Department of ChemistryUniversity of Munich (LMU)81377 Munich Germany;

Department of ChemistryUniversity of Munich (LMU)81377 Munich Germany;

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原文格式 PDF
正文语种 eng
中图分类化学;
关键词
Carbon nitrides; Crystal structure; X‐ray diffraction; Hydrogen bonds; Nitrogen heterocycles;

机译：碳氮化物;晶体结构;X射线衍射;氢键;氮杂环;

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Synthesis and Structure of Melamium Bromide C 66 N 1111 H 1010 Br and Melamium Iodide C 66 N 1111 H 1010 I

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Synthesis and Structure of Melamium Bromide C ₆6 N ₁₁11 H ₁₀10 Br and Melamium Iodide C ₆6 N ₁₁11 H ₁₀10 I