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MTE%2D3%2D2006%2DKey - CHEM 2311H/2411 Midterm Exam#3...

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CHEM 2311H/2411 Midterm Exam #3 November 29, 2006 NAME: ____ ANSWER KEY _______________________ Instructions : Answer the following questions as clearly and concisely as you can. Remember the structure drawing formalisms of organic chemistry; ambiguously drawn structures and those showing improper valency will not receive credit. You will be allotted 90 minutes to complete the test. You may use a molecular model set and a calculator to help you, but the use of notes, books, and other materials is not permitted. The administration of this exam is governed by the policies on academic honesty and integrity outlined in the University of Georgia's Academic Honesty Policy. Please assert that you have complied with the letter and spirit of these guidelines in taking this exam: On my honor, I have neither given nor received any unauthorized aid on this exam. Further, I have not observed others giving or receiving unauthorized aid on this exam. SIGNATURE: __________________________________ DATE: _____________________ Problem Score Out of 1 9 2 6 3 6 4 32 5 16 6 8 7 12 8 8 9 8 10 10 11 10 Total 125
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NAME: ______________________________ Page 2 of 13 1. Define the following terms: (9 pts) (a) chemical shift The location of a signal in an NMR spectrum. It is measured downfield from a reference, usually TMS. (b) N + 1 rule An 1 H NMR signal for a hydrogen with N equivalent hydrogens bonded to an adjacent carbon is split into N + 1 peaks. (c) base peak The peak with the greatest abundance in a mass spectrum.
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