Fundamentals 1. Claisen enolates a) A novice organic chemistry student took ethyl propanoate and proposed that the following nucleophile could be made by reacting ethyl propanoate with NaOEt. H Explain why the structure above is not a legitimate enolate ion. b) Now write the correct enolate ion, and then explain, by drawing appropriate resonance structures, why the enolate ion you wrote is a more correct nucleophile than the one drawn in part a) above.

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Micelles and Biological Membrane

Micelles are the type of lipid molecules that organize themselves in spherical shape in aqueous solutions. The production of the micelle is a reply to the amphipathic behavior of fatty acids. It means that they consist of both hydrophobic regions and hydrophilic regions. In micelles, polar head groups (hydrophilic groups) produce an outer layer associated with water whereas nonpolar tails (hydrophobic groups) are organized in the interior.