what is the effect of double bonds (unsaturation) on the physical properties of fatty acids? tell...
what is the effect of double bonds (unsaturation) on the physical properties of fatty acids? tell what the effect is, then briefly explain why/how the double bonds have this effect
Homework Answers
Smaller the hydrocarbon chain and more the no. Of unsaturation in cis configuration causes decrease in melting point of fatty acids. As cis configuration cause the fatty acid to bend and form kink , which decrease the force of attraction between the fatty acids.
Double bonds in unsaturated fats cause kinks in fatty acid chain which prevent the molecules from packing closely together to form a solid at room temperature, so such fats are liquid in room temperature .
Short chain length and unsaturation enhance the fluidity of fatty acids and of their derivatives.
The more double bonds the chain has in the CIS configuration, the less flexibility it has.The effect of this is that, in restricted environments, such as when fatty acids are part of a phospholipid in a lipid bilayer, or triglycerides in lipid droplets, cis bonds limit the ability of fatty acids to be closely packed, and therefore can affect the melting temperature of the membrane or of the fat.
A TRANS configuration, by contrast, means that the adjacent two hydrogen atoms lie on opposite sides of the chain. As a result, they do not cause the chain to bend much, and their shape is similar to straight saturated fatty acids.
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what is the effect of double bonds (unsaturation) on the
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