quiz3-2001-2002

Quiz3-2001-2002 - v3.1 Quiz#3 CHEM 111 Fall Semester 2001/2002 Student Name Student ID Section Note You are required to complete all questions

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v3.1 1 Quiz #3, CHEM 111, Fall Semester, 2001/2002 Student Name: Student ID #: Section: Note: You are required to complete all questions independently. Reference materials and textbook are prohibited. Total marks for this quiz are 50 points. Question 1: Draw the line-bond (Kekulé) structures of the following molecules. (5 points) ( A ) (4 Z )-2,4-Dimethyl-1,4-hexadiene ( B ) trans -3-Hexene Answer: ( A ) ( B ) Question 2: Among the alkenes given below, which compound is the most stable? Using molecular orbital theory for your reasoning. (10 points) (C) (D) (E) (F) H 3 C H 3 C CH 3 H 3 C H 3 C H 3 CH 3 CC H 3 H 3 H 3 CH 3 Answer: Question 3: When ( G ) is treated with strong acid at room temperature, isomerization occurs by the following mechanism to give ( H ). At equilibrium, the product mixture contains about 30% ( G ) and about 70% ( H ). Calculate K eq for the reaction. Which alkene is more stable? Why? (10 points) CH 3 CH 3 CH 3 CH 3 CH 3 CH 3 H H H H H H + H + + H H ( G ) (ca. 30%) ( H ) (ca. 70%) Answer:
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v3.1 2 Question 4: R earrangement of ( I ) to ( J ) occurs as shown below. Provide your reasoning for the driving force which makes the rearrangement possible. In the provided box below, sketch a reaction
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This note was uploaded on 02/27/2010 for the course CHEM CHEM111 taught by Professor Dai during the Fall '06 term at HKUST.

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Quiz3-2001-2002 - v3.1 Quiz#3 CHEM 111 Fall Semester 2001/2002 Student Name Student ID Section Note You are required to complete all questions

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