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首页> 外文期刊>Crystallography reports >Synthesis and the crystal and molecular structures of 4-(piperidyl-1)-2-phenylpyrido[2,3-a]anthraquinone-7,12 Mono- and dibromohydrates (HL)Br center dot 3H(2)O and (H-2 L)Br-2 center dot 3H(2)O
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Synthesis and the crystal and molecular structures of 4-(piperidyl-1)-2-phenylpyrido[2,3-a]anthraquinone-7,12 Mono- and dibromohydrates (HL)Br center dot 3H(2)O and (H-2 L)Br-2 center dot 3H(2)O

机译:4-(哌啶基-1)-2-苯基吡啶并[2,3-a]蒽醌-7,12一和二溴水合物(HL)Br中心点3H(2)O和(H- 2 L)Br-2中心点3H(2)O

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摘要

4-(Piperidyl-1)-2-phenylpyrido[2,3-a]anthraquinone-7,12 monobromohydrate (HL)Br center dot 3H(2)O (I) and 4-(piperidyl-1)-2-phenylpyrido[2,3-a]anthraquinone-7,12 dibromohydrate (H-2 L)Br-2 center dot 3H(2)O (II) are isolated in the crystalline state. The crystal structures of compounds I and II are determined using X-ray diffraction. It is established that the protonation of 4-(piperidyl-1)-2-phenylpyrido[2,3-a]anthraquinone-7,12 proceeds primarily through the pyridine atom at pH 2-3. The attachment of the second proton occurs through the piperidine nitrogen atom at pH similar to 1.
机译:4-(哌啶基-1)-2-苯基吡啶并[2,3-a]蒽醌-7,12一溴水合物(HL)Br中心点3H(2)O(I)和4-(哌啶基-1)-2-苯基吡啶并[2,3-a]蒽醌-7,12二溴水合物(H-2 L)Br-2中心点3H(2)O(II)处于结晶状态。使用X射线衍射确定化合物I和II的晶体结构。已确定4-(哌啶基-1)-2-苯基吡啶并[2,3-a]蒽醌-7,12的质子化主要通过pH 2-3的吡啶原子进行。第二个质子的附着通过哌啶氮原子在类似于1的pH值上发生。

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