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Exam%202%202007mar1 - Spring 2007 4:122 Exam 2 Name(Print...

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Name ____________________________________ 1 Spring 2007, 4:122 Exam 2 (Print) ID _______________________________ ____________ 1) List all structures that are aromatic by entering the letter(s) on the line. [6 pts] A B C D E 2) Consider the structure drawn in the circle. Draw the molecular orbitals and electrons for each possibility—the cation, neutral and the anion. Label each of those as aromatic or antiaromatic where appropriate. [6 pts] cation neutral anion aromatic, antiaromatic?? 3) Rank the three molecules in order of INCREASING acidity. Enter the label (letter) of the structure above the three terms. [6 pts] __________ ________ __________ least acidic middle most acidic ____________ 4) Which of these features are important and necessary to the opioid pain receptor? Morphine and the natural pain relievers, the endorphins, contain the necessary structural components. Choose all that apply by entering the letters on the line next to the question number. [4 pts] A) nitrogen atom B) carbonyl oxygen C) hydroxyl D) phenol E) benzene ring G) thiol (SH) H) two fused six-member rings
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Name ____________________________________ 2 ____________ 5) Which features are necessary and true for a structure to be aromatic.
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