Alkyl Halides

Bromocyclohexane

This spectrum (#4 in your workbook) is that of bromocyclohexane. It is an alkyl halide. In the diagnostic region, it is indistinguishable from the spectra of alkanes.
The absorptions to the right of 3000 are the same as we have observed for alkanes because they are caused by C-H bonds just as in alkanes. The carbon-to-halogen bonds do not absorb energy in the regions that we will be looking at. Thus the infrared spectra will not enable us to distinguish between alkyl halides and alkanes.

Comments

Beginning with the next lesson you will study compounds for which the IR spectra are important identification tools. For now it is important that you learn where the absorption for the C-H bonds are located, so that when you see an absorption that is different, you can recognize it as such.

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E-mail instructor: Eden Francis

Clackamas Community College
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