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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >PREPARATION AND CRYSTAL STRUCTURE OF GUANIDINIUM CYCLODODECAPHOSPHATE HEXAHYDRATE - [C(NH2)(3)]12P12O36-CENTER-DOT-6H(2)O
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PREPARATION AND CRYSTAL STRUCTURE OF GUANIDINIUM CYCLODODECAPHOSPHATE HEXAHYDRATE - [C(NH2)(3)]12P12O36-CENTER-DOT-6H(2)O

机译:环十二碳六环合钒酸盐的制备和晶体结构-[C(NH2)(3)] 12P12O36-CENTER-DOT-6H(2)O

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摘要

The title compound was prepared by ion exchange from the potassium salt, K12P12O36. 19/2H(2)O. It represents a second new structural type of [P12O36](12-) ring anions. This sparingly water soluble salt is hexagonal, space group P6(3), with Z=2 and the cell dimensions: a=15.904(7), c=16.67(2) Angstrom. The crystal structure was solved by direct methods and refined to a final R value of 0.050. The ring anion is located around the threefold axis and hence has a threefold symmetry. The stacking of the rings creates large channels, parallel to the c direction, in which the guanidinium groups and the water molecules are located. Three of the six independent guanidinium groups are located on the threefold axes. The cohesion of the structure is performed by the numerous H-bonds generated by the organic cations and the water molecules. [References: 8]
机译:通过从钾盐K12P12O36进行离子交换来制备标题化合物。 19 / 2H(2)O。它代表了[P12O36](12-)环阴离子的第二种新结构类型。这种微溶于水的盐是六边形的,空间群P6(3),Z = 2,像元尺寸为:a = 15.904(7),c = 16.67(2)埃。通过直接方法解析晶体结构,并将其精制至最终R值为0.050。环状阴离子位于三重轴周围,因此具有三重对称性。环的堆叠形成平行于c方向的大通道,胍基和水分子位于该通道中。六个独立胍基组中的三个位于三重轴上。结构的凝聚力是由有机阳离子和水分子产生的大量H键实现的。 [参考:8]

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