Vitride has the formula NaAlH2(OCH2CH2OCH3)2.
a) What is the molar mass of Vitride? (1 point)
b) Vitride is sold as a 70% by mass solution in toluene. The average mass of
a drop of toluene is about 15 mg. Assuming that the density of toluene and
the Vitride solution are the same, how many moles of Vitride are in one drop
of the Vitride solution? (2 points)
c) Let’s assume that, as a preventative measure, you added 2 drops of the
Vitride solution to your bromobenzene/Mg mixture when forming the
Grignard reagent, but that your ethereal solution was completely dry (i.e. no
water). That Vitride would reduce the 2methylpropanal when it is added to
the Grignard reagent.
What mass of reduced aldehyde would be formed after the workup of the
reaction? HINT: Look carefully at the structure of Vitride. (2 points)
d) Assuming Vitride reduced the aldehyde faster than the Grignard reagent,
and also assuming the reduced aldehyde acted just like your desired product
during the isolation of 2methyl3heptanol, what is the mass percent of the
reduced aldehyde in your product mixture? (3 points)
e) It’s generally a bad idea to add extra reagents that are capable of reacting
to a reaction due to the possibility of multiple products that are inseparable.
Comment on whether or not it is/was worthwhile to add Vitride to a sluggish
Grignard reagent formation based on your answer to part (d) above as well
as based on how you characterized the product. (2 points)
NEED HELP WRITING YOUR PAPER?
PLACE AN ORDER WITH US TODAY AND ENJOY A 10% DISCOUNT. USE DISCOUNT CODE: Disc10