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首页> 外文期刊>Journal of Fluorine Chemistry >NMR study of the [VO(O_2)_2F]~(2-)ion in solution:Synthesis,vibrational spectra and crystal structure of
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NMR study of the [VO(O_2)_2F]~(2-)ion in solution:Synthesis,vibrational spectra and crystal structure of

机译:溶液中[VO(O_2)_2F]〜(2-)离子的NMR研究:合成,振动光谱和晶体结构

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摘要

The presence of the [VO(O_2)_2F]~(2-)ion in an aqueous solution gives rise to a doublet(delta=-714 ppm,J_(VF)= 163(+-)3 Hz)in the ~(51)V NMR,and a multiplet(delta =-160 ppm,DELTAnu_(1/2)= 1163 Hz)in the ~(19)F NMR spectrum.The formation of this species is enhanced in formamide solutions.The ethane-l,2-diammonium(2+)fluorooxodiperoxovanadate,[NH_3CH_2CH_2NH_3][VO(O_2)_2F],was prepared from aqueous solution and characterized by elemental analysis,and IR and Raman spectroscopies.The complex crystallizes in the orthorhombic space group Pbca with eight formula units in a cell of dimensions:a = 9.2690(4),b = 8.8321(5)and c = 16.7605(8)A.The complex anion has a rare pentagonal pyramidal structure with a very weak intermolecular interaction d(V...O)= 2.8730(12)A between the vanadium atom and the double-bonded oxygen atom from the adjacent anion.
机译:水溶液中[VO(O_2)_2F]〜(2-)离子的存在会在〜()中产生双峰(δ= -714 ppm,J_(VF)= 163(+-)3 Hz)。 51)V NMR,在〜(19)F NMR光谱中具有多重峰(δ= -160 ppm,DELAnu_(1/2)= 1163 Hz)。在甲酰胺溶液中该物种的形成得到增强。从水溶液中制备了2-2-(2+)氟氧合过氧钒酸盐[NH_3CH_2CH_2NH_3] [VO(O_2)_2F],并用元素分析,红外光谱和拉曼光谱进行了表征。该络合物在正交晶系Pbca中以八个分子式结晶。单元格中的尺寸单位为:a = 9.2690(4),b = 8.8321(5),c = 16.7605(8)A。络合物阴离子具有罕见的五角锥体结构,分子间相互作用d(V ...钒原子与来自相邻阴离子的双键氧原子之间的O)= 2.8730(12)A。

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