Problems and exercisesAlcohols and phenols

State which reagent you would use to convert hexane-1,5-diol into (a) 5-hydroxyhexanal, (b) 6-hydroxyhexan-2-one and (c) 5-oxohexanoic acid.

Why is the Swern oxidation carried out at −78 °C? What by-products are formed and which one is responsible for the smell?