Learning Check L2 What are the fatty acids in the following triglyceride? Triglycerides (triacylglcerols) Esters of glycerol and fatty acids stearic acid mp 69☌ oleic acid mp 13☌ linoleic acid mp -17☌įats and Oils Formed from glycerol and fatty acids Because linoleic has two double bonds, it would have a lower mp than oleic acid, which has one double bond. Solution L1 Stearic acid is saturated and would have a higher melting point than the unsaturated fatty acids. stearic acid (18 C) saturated oleic acid (18 C) one double bond linoleic acid (18 C) two double bonds Learning Check L1 How would the melting point of stearic acid compare to the melting points of oleic acid and linoleic acid? Assign the melting points of –17☌, 13☌, and 69☌ to the correct fatty acid.

Nonlinear chains do not allow molecules to pack closely.Fit closely in regular pattern Unsaturated fatty acids.Saturated and Unsaturated Fatty Acids Saturated = C–C bonds Unsaturated = one or more C=C bonds Some contain double bonds corn oil contains 86% unsaturated fatty acids and 14% saturated fatty acids.Typically 12-18 carbon atoms (even number).Lipids with fatty acids Waxes Fats and oils (trigycerides) Phospholipids Sphingolipids.Lipids Types of Lipids Fatty Acids Fats, and Oils Chemical Properties of Triglycerides

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