CH223 Exam 1 - CH223 Exam 1

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CH223 Exam 1 (Test) SHAW ROBERT H CH 223, section 001, Fall 2008 Instructor: Kay Sandberg Web Assign Current Score: 0 out of 100 Due: Monday, September 29, 2008 02:00 PM EDT Description Exam 1 covers the concepts covered in HW's indicated in the syllabus. Before opening this exam, please put away all notes, textbook, flashcards, periodic tables or any other aids except for your model kit. Also, close all browser windows except for the exam browser window and only open links within the exam. You may have blank paper for scratch work. You are on your honor. Once you access the exam, you will have 75 minutes. You cannot stop the clock once it has started. Instructions Periodic Table The due date for this assignment is past. Your work can be viewed below, but no changes can be made. Request Extension 1. --/7.5 points Write the letter that corresponds to the correct carbonyl compound. The answer key is NOT case-sensitive so you can put either the lower case or upper case letter. A) Which carbonyl compound above has the least electrophilic carbonyl carbon? (No Response) B B) Which carbonly compound has the most electrophilic carbonyl carbon? (No Response) A C) You need to reduce all of the carbonyl groups above. You have access to both NaBH 4 and LiAlH 4 , but you have only enough LiAlH 4 for one reduction (you have plenty of NaBH 4 ). Which carbonyl compound would you treat with LiAlH 4 given that information? (No Response) B 2. --/9 points Draw the skeletal structure of the indicated major organic product. CH223 Exam 1 http://www.webassign.net/v4cgirhshaw@ncsu/student.pl?y=2008120717. .. 1 of 13 12/7/2008 12:33 PM
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Please save this part of the question to do after you have submitted all other questions (jot the question number down for easy reference and jot down the structures in case you cannot get back into the exam.) In the space provided on the sheet of paper given to you show the mechanism (electron flow arrows) for the reaction that occurs between the reactants below. You are welcome to use the ppp structure for the LiAlD 4 if you so desire. To receive full credit you must include the following: 1) the structures of all proposed intermediates, 2) all formal charges and all lone pairs of electrons, 3) the acid workup using H 3 O + as the acid. You will be awarded full credit for the question initially, but when I grade your mechanism, you will lose points for incorrect arrows, missing arrows, or any of the 3 things listed above. Please type OK in the box below if you understand the red font message. (No Response) Key: OK Solution or Explanation Click for the answer key to various versions: Please note that some versions may have D 3 O + instead of H 3 O + , but the mechanism arrows and formal charges are the same. CH223 Exam 1
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This note was uploaded on 02/03/2009 for the course CH CH 102, 20 taught by Professor Ta,ta,sandberg during the Fall '08 term at N.C. State.

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CH223 Exam 1 - CH223 Exam 1

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