Science & Fun  Home  Introduction into the ^{1}H NMR Spectroscopy  
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Sorry, wrong answer!Have another, closer look at the isomer and follow the approach outlined on page 19:One option is to analyze the remainder of the molecule from the view point of each single proton, for example from H^{1} and H^{3}: H^{1} and H^{3} obviously have entirely identical environments. They should give rise to a single signal. Alternatively you can make use of the symmetry of the molecule. Did you notice that this molecule has an axis of twofold rotational symmetry (C_{2}) ? Therefore H^{1} and H^{3} exchange positions upon a 180° rotation around (C_{2})!
