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Effects of substituents on the acidity of phenols: Existence of electron attracting group, (for example-NO2, -X, - NR, -CN, -CHO, -COOH) on the benzene ring increases the acidity of phenol since it enables the ring to draw much more electrons from the phenoxy oxygen and so releasing easily the proton.
Phospholipid structure prevents the formation of micelles because the two fatty acids, one of which is usually unsaturated, prevent aggregation into a tight sphere. Instead, phospholipids form liposomes, in which phospholipid molecules form a double layer, or bilayer, in a much larger sphere.hospholipid monomers include two fatty acids and one glycerol molecule in a structure similar to diglycerides. Attached to the third hydroxyl of glycerol is a unique monomer containing a phosphate group. The fatty acid segment, or âtail,â of a phospholipid lacks polarity and is strongly hydrophobic.