Question

Problem 1 (15 points) Giving the following structure: a) (5 points) Identify two functional groups b) (5 points) Draw the expanded structural formula C) (5 points) Write the molecular formula Problem 2 (20 points) Given the following molecule: HC-00 HC-OO HC-o a a) (5 points) What kind of lipid is it? b) (5 points) Is this lipid more likely to be solid or liquid? Explain C) (10 points) Write the names of the reactions (more than one) that will take place to obtain as a final product a mixture of saturated fatty acids and glycerol Problem 3 (20 points) Using reactions we have studied, indicate how you might prepare ethyl ethanoate from two molecules of ethanol. (it takes more than one reaction).

Answer 1

Soini LOH W (a) one is carboxylic group(-cool) another is ester(-0-²-CH3) (6) expanded structural formula corit CEO HH-C-H Molecular formula: Co HBO Coor Low Hdcocina VES There are three main types of lipid o triglycerides cil Phospholipid Til stenoe But here the given lipid molecules contain one glycerol and three fatty acids chain. This this lipid is called triglyceride. The physical state solid on liquid of lipid depend on the stacking of fatty acid in the molecular thame work. When it is well stacking then melting of lipid very high. stacking of lipid molecule will be very well when symmetry in the sat molecule is very high. But when there is lange number of cis-double bond in the molecule , the staking of molecule is not good and there is a thee space in the molecular framework As this lipid

has lange number of cis-double bond so there is not well stacking in the molecule, thus melting point is low, they as room temperature this type of lipids are mostly liquid. (c) The eis double bond of lipid becomes saturated when theated with polc and H₂. This heaction is known as hydrogenation reaction- Then this saturated triglycerides is treated with aqueous acid, glycerol and saturated fatty acid is formed. This reaction is known as esten hydrolysis. 1 eros, Hasou charlotte OH eno3, H₂SO4 Hit) eta -CH2-014 – H20 CH₂ CH2OH ethanol Jhon's onidation onidation of Primary alcohol CH₂ thor CH₂ - CH3 to acid ethyl thanoate 2nd step is the estenification reaction of carbonylic acid and alcohol in Presence of acid catalyst.