17 CH203 Fall 2014 Lecture 17 October 14.pdf

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  • 8/11/2019 17 CH203 Fall 2014 Lecture 17 October 14.pdf

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    CH203 Fall 2014 NMR Practice Quiz

    1. Consider the 1H NMR spectrum below

    a. How many types of hydrogen are present, assuming no serious overlap between differenttypes? _____

    b. What is the chemical shift of the hydrogen type that is most shielded? ______

    c. Consider the multiplicity, which derives from spin-spin coupling. What best describes themost shielded hydrogen type?____Singlet____Doublet____Triplet____Quartet

    ____Doublet of doublets

    d. What does this multiplicity indicate about the most shielded hydrogens? _____There is one hydrogen present at this position _____There are two hydrogens present at this position _____There are three hydrogens present at this position _____There are two hydrogens on the neighboring carbon _____There are three hydrogens on the neighboring carbon

    e. If the molecular formula of the compound is C 3H7Br, what does the integration show about themost shielded hydrogens?

    _____There is one hydrogen present at this position _____There are two hydrogens present at this position

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