Esprit Rock

Sodium borohydride is a good reducing agent

Sodium borohydride is a good reducing agent. Although not as powerful as lithium aluminium hydride (LiAlH4), it is very effective for the reduction of aldehydes and ketones to alcohols. By itself, it will generally not reduce esters, carboxylic acids, or amides (although it will reduce acyl chlorides to alcohols). Reduction of organic molecule usually corresponds to increasing its hydrogen content or to decreasing its oxygen content. In this experiment ketones was reduced to alcohol. The expected product in this experiment is cyclohexanol which is formed from cyclohexanone.
The percentage yield of the product is 87.4 % .The reducing agent is NaBH4 and cyclohexanol is the expected product .Cyclohexanone and cyclohexanol have different solubility in water .In this experiment methanol is a solvent and it also used to detect wether the NaBH4 active or not to do the reaction. If there is vigorous reaction so the NaBH4 is active and can be used to reduced cyclohexanone to cyclohexanol. NaBH4 is not very strong reducing agent because it only can reduced ketone and aldehyde.
The density of cyclohexanol is higher compared to aqueous solution , so , while handling the experiment we take the bottom layer liquid to further the experiment. The remainder product was extracted two times to make sure there is no left any cyclohexanol in the separatory funnel. Anhydrous sodium sulphate is used to absorb the moisture and the product were evaporated using rotary evaporator.
The experiment is success, even we do not get 100% percentage yield but we still get87.4% which is near to the 100% yield. This may causes by few error. While we are handling the separatory funnel , the funnel was broken and there is some of our product we released from the funnel so we cannot get the correct percentage of the product