🤓 Based on our data, we think this question is relevant for Professor Graham's class at SJU.
Deuterium (D) is an isotope of hydrogen, in which the nucleus has one proton and one neutron. This nucleus, called a deuteron, behaves very much like a proton, although there are observed differences in the rates of reactions involving either protons or deuterons (an effect called the kinetic isotope effect). Deuterium can be introduced into a compound via the process below:
(a) The C—Mg bond in compound 3 can be drawn as ionic. Redraw 3 as an ionic species, with BrMg + as a counterion, and then draw the mechanism for the conversion of 3 to 4.