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首页> 外文期刊>Acta Crystallographica, Section B. Structural Science >Face-to-face stacking of quinoid rings of alkali salts of bromanilic acid
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Face-to-face stacking of quinoid rings of alkali salts of bromanilic acid

机译:溴酸碱金属盐醌环的面对面堆积

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摘要

A series of alkali salts of hydrogen bromanilic acid trihydrates (K ~+, Rb ~+ and Cs ~+, potassium, rubidium and caesium 2,5-dibromo-4-hydroxy-3,6-dioxocyclohexa-1,4-dien-1-olate trihydrate), bromanilic acid tetrahydrate (Na ~+, disodium 2,5-dibromo-3,6- dioxocyclohexa-1,4-diene-1,4-diolate tetrahydrate) and bromanilic acid dihydrates (K ~+, Rb ~+ and Cs ~+, dipotasium, dirubidium and dicaesium 2,5-dibromo-3,6-dioxo-cyclohexa-1,4-diene-1,4-diolate dihydrate) were prepared and studied by single-crystal X-ray diffraction. Their crystal packings are dominated by quinoid ring stacking. The monoanionic quinoid rings pack face-to-face without offset and with short centroid separations (3.25-3.30 ?), while the dianionic rings form offset stacks (1.4-1.8 ?) with a larger centroid separation (3.8-4.1 ?).
机译:氢溴酸三水合物的一系列碱金属盐(K〜+,Rb〜+和Cs〜+,钾,rub和铯2,5-二溴-4-羟基-3,6-二氧代环己-1,4-二烯- 1-羟基三水合物,溴酸四水合物(Na〜+,2,5-二溴-3,6-二氧代环己-1,4-二烯-1,4-二醇四氢二钠)和溴酸二水合物(K〜+,Rb制备了〜+和Cs〜+,二钾,二铀和二铯2,5-二溴-3,6-二氧代-环己-1,4-二烯-1,4-二醇盐二水合物),并通过单晶X射线研究衍射。它们的晶体堆积以喹啉环堆叠为主。单阴离子醌质环面对面堆积,无偏移,质心间隔短(3.25-3.30?),而双阴离子环形成偏移堆叠(1.4-1.8?),质心间隔大(3.8-4.1?)。

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