deuxneuf
第16楼2009/03/12
In a
centrosymmetric molecule, no band can be active in both Raman scattering and
infrared absorption. This is sometimes called the mutual exclusion rule. In a
centrosymmetric molecule, reflection of any point through the centre will reach
an identical point on the other side (C2H4 is centrosymmetric, CH4 is not). This
distinction is useful particularly for small molecules where a comparison of the
spectra obtained from infrared absorption and Raman scattering can be used to
differentiate cis and trans forms of a molecule in molecules such as a simple azo
dye or a transition metal complex.
书里边的这段话,看不懂哪位高手能解读一下哈?谢谢诶了。尤其是最后一句话不懂。