应用光谱解析练习题_应用光谱解析

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Mid-term exercises:

一、Fill the following blanks with suitable words or phrases(20 points)

1、The wavenumber of a transition is2、The relationship between the energy of a transition and the frequency is given by.3、The number of double bond equivalents corresponds tobetween the molecular formula and that for the saturated acyclic parent compound.4、UV-Vis spectroscopy involves the promotion of electrons from bonding or non-bonding orbitals to.二、Define the following technical terms（12 points）

Chromophore发色团

fingerprint region指纹区

“first order” spectra“一阶”谱

三、Answer the following questions(30 points)

1、A compound of molecular weight 345 is found to have an absorptivity of 248 dm3 g-1cm-1with a path length of 1 cm cuvette, calculate its molar absorptivity, ε.一个分子量为345化合物被发现的248 L3 g-1cm-1吸，以1厘米比色皿的路径长度，计算其摩尔吸光系数ε

C=

2、IR spectrometer typically operates over a range of 2.5~15 um, expre this range in terms of frequency and wavenumber.红外光谱仪通常工作在2.5〜15微米范围内，表达的频率和波数计算，这范围。

四、The characterization of the following spectroscopic spectra(30 points)

1、Characterize the group frequencies of the following IR spectrum of aniline 表征苯胺以下的红外光谱频率组

2、NMR spectral interpretations and their resonances aignment of isopropylbenzene 核磁共振光谱的解释和他们的共振转让的异丙苯

五、Structure determination using spectroscopic methods(8 points)

A compound with a molecular formula of C9H12 gives the following NMR data and IR spectrum.Deduce its structure.结构测定使用（8分光谱方法）

阿的和C9H12分子式化合物提供了以下数据，核磁共振和红外光谱。推断其结构。

NMR data: 1.3(triplet 5H), 2.8(quartet 2H), 3.0(singlet 3H),7.2(multiplet 4H)

1.3（三重5H条），2.8（四方下半年），3.0（单3小时），7.2（多重态4小时）核磁共振数据：