The typical % yield for the reduction of 9-fluorenone using NaBH4 to obtain 9-fluorenol is 80%. In my experiment I obtained 89 %. Can you explain the reasons why my yield is higher? Is it better to obtain a higher yield or a lower yield than the expected one?

Answer 1

I don't know that it's better either way. For a higher yield, it often means the solvent was not completely removed. Another reason is a side product is included.