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Sagot :
The IR spectrum of a solid can be taken by dissolving it to create a solution. An appropriate solvent is carbon tetrachloride as its IR stretches are( only in tne fingerprint region) not visible in the region of infrared.
Non-polar solvents do not show peaks at the region of IR frequency because they do not have dipoles which absorb the infrared light. However, it has been noted that some of these solvent interfere the reaction spectra or absorb within the range of spectra. This property makes them suitable solvents in IR Spectroscopy.
Therefore non-polar solvents such as CCl4 or Carbon disulfide are appropriate for the IR spectrum. They also do not interfere with the halide disks used in the spectrometer, as a solvent like water would.
learn more about carbon tetrachloride:
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