Detection of the Methoxyl Group by Infrared Spectroscopy
Detection of the Methoxyl Group by Infrared Spectroscopy
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红外光谱法检测甲氧基
DOI：
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发表时间：
1968
期刊：
影响因子：
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通讯作者：
I. Degen
中科院分区：
文献类型：
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作者：
I. Degen
甲氧基化合物（包括甲基羧酸酯）在红外光谱的 2860–2800 cm−1 区域表现出弱谱带，可用于诊断甲氧基。该频带出现的频率低于主要 CH 吸收的频率。溴化钾圆盘技术对于固体甲氧基化合物是令人满意的。醛、氨基酸盐酸盐、氮杂环分子和N-甲基胺表现出的吸收带可能与该区域重叠，并且对这些类别的化合物的甲氧基取代基的检测可能不太精确。
Methoxy compounds, including methyl carboxylic esters, exhibit a weak band in the 2860–2800 cm−1 region of the infrared spectrum, which is diagnostic for the methoxyl group. The band occurs at a lower frequency than that of the main C—H absorption. The potassium bromide disk technique is satisfactory for solid methoxy compounds. Aldehydes, amino acid hydrochlorides, nitrogen heterocyclic molecules and N-methyl amines exhibit absorption bands which may overlap this region and the detection of a methoxy substituent for these classes of compound may be less precise.