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首页> 外文期刊>Acta crystallographica. Section C, Structural chemistry. >Tetra- and hexahydrates of bis(adeninium) zoledronate.
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Tetra- and hexahydrates of bis(adeninium) zoledronate.

机译:双(ade啶)唑来膦酸盐的四水合物和六水合物。

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The present paper reports the structures of bis(adeninium) zoledronate tetrahydrate {systematic name: bis(6-amino-7H-purin-1-ium) hydrogen [1-hydroxy-2-(1H-imidazol-3-ium-1-yl)-1-phosphonatoethyl]phosphonate tetrahydrate}, 2C5H6N5(+)·C5H8N2O7P2(2-)·4H2O, (I), and bis(adeninium) zoledronate hexahydrate {systematic name: a 1:1 cocrystal of bis(6-amino-7H-purin-1-ium) hydrogen [1-hydroxy-2-(1H-imidazol-3-ium-1-yl)-1-phosphonatoethyl]phosphonate hexahydrate and 6-amino-7H-purin-1-ium 6-amino-7H-purine dihydrogen [1-hydroxy-2-(1H-imidazol-3-ium-1-yl)ethane-1,1-diyl]diphosphonate hexahydrate}, 2C5H6N5(+)·C5H8N2O7P2(2-)·6H2O, (II). One of the adenine molecules and one of the phosphonate groups of the zoledronate anion of (II) are protonated on a 50% basis. The zoledronate group displays its usual zwitterionic character, with a protonated imidazole ring; however, the ionization state of the phosphonate groups of the anion for (I) and (II) are different. In (I), the anion has both singly and doubly deprotonated phosphonate groups, while in (II), it has one singly deprotonated phosphonate group and a partially deprotonated phosphonate group. In (I), the cations form an R2(2)(10) base pair, while in (II), they form R2(2)(8) and R2(2)(10) base pairs. Two water molecules in (I) and five water molecules in (II) are involved in water-water interactions. The presence of an additional two water molecules in the structure of (II) might influence the different ionization state of the anion as well as the different packing mode compared to (I).
机译:本文报道了双(ade烯)唑来膦酸四水合物的结构(系统名称:双(6-氨基-7H-嘌呤-1-鎓)氢[1-羟基-2-(1H-咪唑-3-鎓-1-) yl)-1-膦酰基乙基]膦酸酯四水合物},2C5H6N5(+)·C5H8N2O7P2(2-)·4H2O,(I)和双(ade烯)唑来膦酸酯六水合物{系统名称:双(6-氨基)的1:1共结晶-7H-嘌呤-1-基氢[1-羟基-2-(1H-咪唑-3-基-1-基)-1-膦酰基乙基]膦酸酯六水合物和6-氨基-7H-嘌呤-1-基6 -氨基-7H-嘌呤二氢[1-羟基-2-(1H-咪唑-3-基-1-基)乙烷-1,1-二基]二膦酸酯六水合物},2C5H6N5(+)·C5H8N2O7P2(2-)· 6H 2 O,(II)。 (II)的唑来膦酸根阴离子的腺嘌呤分子之一和膦酸酯基团之一以50%为基础质子化。唑来膦酸根基团显示其通常的两性离子特征,带有一个质子化的咪唑环。但是,(I)和(II)的阴离子的膦酸酯基的电离状态不同。在(I)中,阴离子具有单和双去质子化的膦酸酯基团,而在(II)中,它具有一个单去质子化的膦酸酯基团和部分去质子化的膦酸酯基团。在(I)中,阳离子形成R2(2)(10)碱基对,而在(II)中,它们形成R2(2)(8)和R2(2)(10)碱基对。 (I)中的两个水分子和(II)中的五个水分子参与水与水的相互作用。与(I)相比,(II)结构中另外两个水分子的存在可能会影响阴离子的不同电离态以及不同的堆积模式。

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