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有机物相对分子质量及其分子结构测定的氢谱法、质谱法、红外光谱法,是鉴定有机物分子结构的现代物理方法,具有所需样品少、速度快、准确、甚至还可确定分子的三维空间结构的优越性.一、核磁共振氢谱运用核磁共振氢谱可以确定氢原子的种类及数目.根据质量数为奇数的氢原子核具有磁性,当它吸收一定频率的电磁辐射后,使其从低能态跃迁到高能态的现象叫核磁共振.处于不同化学环境中的氢原子因产生共振时吸收电磁波的频率不同,
Hydrogen spectrum, mass spectrometry, and infrared spectroscopy, which are used to determine the relative molecular mass of organic compounds and their molecular structures, are the modern physical methods to identify the molecular structure of organic compounds. They have the advantages of less required samples, high speed, accuracy and even determination of the three-dimensional Structure superiority.NMR Nuclear magnetic resonance spectroscopy can be used to determine the type and number of hydrogen atoms.According to the mass number of hydrogen atoms is odd magnetic nuclei, when it absorbs a certain frequency of electromagnetic radiation, make it from low energy State transition to a high energy state is called nuclear magnetic resonance.Hydrogen atoms in different chemical environments due to the resonance frequency of absorption of electromagnetic waves are different,