Tell how infrared spectrometry can be used to differentiate the following compounds. In each case, indicated the signifcant IR bands that will be observed and their approximate wave numbers.
(a) 1-butanol, 2-butanol, and 2-methyl-2-butanol
(b) ortho-xylene, meta-xylene, para-xylene
(c) butanal, 1-butanol, 2-butanone, butanoic acid, butyl acetate