CHEM 14C Study Guide - Midterm Guide: Lycopene, Pentose, Photon
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Chemistry 14c spring 2017 first midterm exam page 1. Ascorbic acid (vitamin c) is a widespread hydrophilic (water-soluble) antioxidant vitamin found in oranges and other fruits. On this exam page we explore various aspects of this molecule"s structure. Rank the electronegativities of these three elements by writing their symbols in the corresponding blanks below. In the event of an electronegativity tie, write more than one element symbol in the blank, and leave one (or two) blanks empty. Lone pairs: _______ sp2 atoms: _______ pi electrons: _______ Total number of sp3 stereocenters: _______ total number of sp3 stereocenters with r configuration: ______ (6) complete each structure drawing in boxes below. If the structure is not possible write "not possible" in the box. _____ (2) in each "optically active?" blank in question 6 write "y" (for yes) if the molecule is optically active or "n" (for no) if the molecule is optically inactive.
