Physical Properties and Sources of Esters

Esters can participate in hydrogen bonds with substances that contain hydroxyl groups (water, alcohols, carboxyhc acids). This confers some measure of water solubility on low-molecular-weight esters methyl acetate, for example, dissolves in water to the extent of 33 g/100 mL. Water solubihty decreases as the carbon content of the ester increases. 

Many esters occur naturally. Those of low molecular weight are fairly volatile, and many have pleasing odors. Esters often form a significant fraction of the fragrant oil of 

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