AN INFRARED STUDY OF THE BASICITY OF NON‐AROMATIC IMINES: RELATION TO VISUAL PIGMENTS
AN INFRARED STUDY OF THE BASICITY OF NON‐AROMATIC IMINES: RELATION TO VISUAL PIGMENTS
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非芳香族亚胺碱性的红外研究：与视觉颜料的关系
DOI：
10.1111/j.1751-1097.1978.tb07707.x
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发表时间：
1978
影响因子：
3.3
通讯作者：
D. Vocelle
中科院分区：
文献类型：
--
作者：
J. Favrot;C. Sandorfy;D. Vocelle
摘要：了解非芳香族席夫碱的碱度对于解释视觉的光化学初级步骤非常重要。为了得到它的估计，我们测量了氯仿d溶液中一些脂肪胺、吡啶衍生物和非芳香族席夫碱的红外光谱。从已知的脂肪族和吡啶碱的pKa值和C-D的自由相关频移（Av）。在N氢键的情况下，推测了希夫碱的pKa值。它们的范围从6到8。碱性不如脂肪胺，但比吡啶碱稍强。
Abstract— The knowledge of the basicity of non‐aromatic Schiff‐bases is important for the interpretation of the photochemical primary step of vision. In order to obtain an estimate of it, the infrared spectra in chloroform d solution of a number of aliphatic amines, pyridine derivatives and non‐aromatic Schiff‐ bases have been measured. From the known pKa values of the aliphatic and pyridine bases and the free‐associated frequency shift (Av) of the C—D. N hydrogen bonds, the pKa values for the Schiff‐bases were inferred. They range from 6 to 8. 5, less basic than aliphatic amines but somewhat more basic than pyridine bases.