chemistry homework help

Question

Consider the nucleophilic addition reaction of 2‑butanone with excess propyl magnesiumbromide, made in situ by reacting 1‑bromopropane with metallic magnesium, to make 3‑methyl‑3‑hexanol.

A reaction was performed in which 0.35mL of 2‑butanone was reacted with an excess of propyl magnesiumbromide to make 0.343 g of 3‑methyl‑3‑hexanol. Calculate the theoretical yield and percent yield for this reaction.

Answer 1

Hi Damon H.,

So, convert the volume of 2-butanone into a mass using literature density value.

Next, convert that to moles (use molar mass from CRC Handbook, or calculate from formula and periodic table elemental masses). Should make the same # moles of product. Convert that back to a mass, and compare to actual, for %yield.

Note that "excess magnesiumpropylbromide" does not enter into the numbers in any way!

-- Cheers, - Mr. d.