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TRIGLYCERIDES

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TRIGLYCERIDES

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TRIGLYCERIDES

  1. 1. SUBMITTED TO:- MISS ANANYA SUBMIT TED BY :-MOIN KHAN HUSSAIN UID:-14BBT1129
  2. 2. TRIGLYCERIDES
  3. 3. • An ester of glycerol with three fatty acids. • Also known as triacylglycerols • One type of lipid categorised as simple lipid. Triglycerides
  4. 4. Structure of Triglycerides • Glycerides are lipid esters • A triglyceride places fatty acid chains at each alcohol group of the glycerol CH2 CH CH2 O O O C O C O C O R1 R2 R3 Glycerol part Fatty acid chains
  5. 5. Glycerol • Glycerol Always looks the same • 3 C’s with 3 OH’s and everything else H’s.
  6. 6. Formation of Triglycerides
  7. 7. Example of triglycerides ▫ Triglyceride derived from one molecule each of palmitic acid, oleic acid, and stearic acid, the three most abundant fatty acids in the biological world. CH2OC(CH2) 14CH3 CH2OC(CH2) 16CH3 CH3( CH2)7 CH=CH(CH2 )7COCH O O O oleate (18:1) stearate (18:0) palmitate (16:0)
  8. 8. Physical properties of triglycerides • Physical properties depend on the fatty acid components. ▫ Melting point increases as the number of carbons in its hydrocarbon chains increases and as the number of double bonds decreases. ▫ Oils: Triglycerides rich in unsaturated fatty acids are generally liquid at room. ▫ Fats: Triglycerides rich in saturated fatty acids are generally semisolids or solids at room temperature.
  9. 9. Physical properties of triglycerides ▫ Hydrocarbon chains of saturated fatty acids can lie parallel with strong dispersion forces between their chains; they pack into well-ordered, compact crystalline forms and melt above room temperature. ▫ Because of the cis configuration of the double bonds in unsaturated fatty acids, their hydrocarbon chains have a less ordered structure and dispersion forces between them are weaker; these triglycerides have melting points below room temperature.
  10. 10. Chemical Properties Triglycerides have typical ester and alkene chemical properties as they are composed of these two groups:- ▫ Saponification: replace H with salt from a strong base ▫ Hydrolysis: produces the fatty acids and glycerol, a reverse of formation ▫ Hydrogenation: saturates the double bonds
  11. 11. Triglyceride Reactions • Triglycerides undergo three basic reactions • These reactions are identical to those studied in carboxylic acids Triglyceride Glycerol Fatty Acids Glycerol Fatty Acid Salts More saturated triglyceride H2O, H+ NaOH H2, Ni
  12. 12. Hydrolysis
  13. 13. Saponification
  14. 14. Hydrogenation

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