A simple ch 3 in the area of 1 and a ch 2 shifted down to about 4 by the electronegative oxygen. Proton nmr for a molecule such as diethyl ether ch 3 ch 2 och 2 ch 3 two types of protons would be predicted to appear in the nmr spectrum. The 1 1 and 2 1 complexes of diethyl ether with tin tetrachloride and their stability studied by 119sn nmr spectroscopy journal of the chemical society perkin transactions 2 2001.
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