Synthesis and the crystal and molecular structures of 4-(piperidyl-1)-2-phenylpyrido[2,3-a]anthraquinone-7,12 Mono- and dibromohydrates (HL)Br · 3H2O and (H2L)Br2 · 3H2O

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作者：
O. V. Kovalchukova
A. I. Stash
V. K. Belsky
S. B. Strashnova
B. E. Zaĭtsev
M. A. Ryabov
机构：
[1] Peoples’ Friendship University of Russia,
[2] Karpov Institute of Physical Chemistry,undefined
来源：
Crystallography Reports | 2009年 / 54卷
关键词：
61.66.Hq;
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摘要：
4-(Piperidyl-1)-2-phenylpyrido[2,3-a]anthraquinone-7,12 monobromohydrate (HL)Br · 3H2O (I) and 4-(piperidyl-1)-2-phenylpyrido[2,3-a]anthraquinone-7,12 dibromohydrate (H2L)Br2 · 3H2O (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 ∼ 1.
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页码：68 / 73
页数：5
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