15. Analytical Techniques:IR, NMR, Mass Spect

Why is the C–O absorption band of 1-hexanol at a smaller wavenumber (1060 cm^–1) than the C–O absorption band of pentanoic acid (1220 cm^–1)?

Choose the bond in each pair that you expect to have the more intense stretching band

(b) C=O vs. C=N

Which of the following compounds has a vibration that is infrared inactive?

1-butyne, 2-butyne, H₂, H₂O, Cl₂, ethene

There are three carbon–oxygen bonds in methyl acetate.

a. What are their relative bond lengths?

b. What are the relative infrared (IR) stretching frequencies of these bonds?

Calculate the reduced mass for the following bonds.

(c) C―Cl