Water infrared absorbance spectrum

As an alternative to infrared spectroscopy. Raman spectroscopy can be easier to use in some cases for example, whereas water and glass are strong infrared absorbers they are weak Raman scatterers, so that it is easy to produce a good-quality Raman spectrum of an aqueous sample in a glass container. 

Anhydrous quinazoline hydrochloride absorbs one molecule of water readily, and. the product is difficult to dehydrate completely even in a high vacuum at 60°. Infrared spectral data suggest that this water is covalently bound because of (o) the absence of several bands in the spectrum of the hydrate which are present in the spectrum of the anhydrous hydrochloride and (6) the presence of extra bands at 1474 and 1240 cm that have been attributed to C— H and O— H bending vibrations of the — CHOH group. 

CFC-12. These manmade chemicals absorb infrared radiation in a part of the spectrum where water vapor and CO2 do not already have strong bands. On the other hand, the manmade increase of CO2 is so large (currently ca. 25% since the mid-1800s - see Chapter 11) that it is the largest anthropogenic input to the greenhouse effect (not counting feedbacks). 

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