Hydroboration oxidation of propene gives 1-propanol as the product. Number of moles of alcohol formed when one mole of BH3 / THF is involved in the reaction is

CH3-CH=CH2→THFBH3CH3-CH|H-CBH2|H2 (CH3CH2CH2)BH2→2 CH3CH=CH2(CH3CH2CH2)3Btrialkyl borane (CH3CH2CH2)3B→OH-H2O23CH3CH2CH2OHThus 1 mole BH3 require 3 moles of alkene and 3 moles of H2O2 to give 3 moles of alcohol.