Reaction of a non-racemic sample of 1-phenylbutan-1-ol with (S)-Mosher's acid chloride under basic conditions gave a quantitative yield of two diastereoisomeric esters. In the 1H NMR spectrum of the mixture, the relative integrations of the methoxy group resonances arising from the diastereoisomeric esters was 1.0:3.2. (S)-Moshersacidchloride ? (i) Draw structures for the two diastereoisomers and assign the configuration at all stereogenic centres. (ii) Calculate the enantiomeric excess (ee) of the non-racemic sample of 1 phenylbutan-1-ol