Part I

First, measure out the necessary coupling reagent. Write down the mass in your lab notebook.

The photo shows a piece of weighing paper on top of a laboratory scale. The weighing paper contains a small pile of white crystalline powder, and the screen on the scale reads “0.189 g.” A gloved hand holds a small brown glass reagent bottle near the scale; its label reads “Salicylic Acid.”

Dissolve the coupling agent in the sodium hydroxide solution and cool the mixture on ice.
Be sure to record the volume of sodium hydroxide used to create the solution.

The photo shows the contents of a folded piece of weighing paper being poured into a small graduated test tube. The test tube is tapped against the lab bench to bring the white solids to the bottom of the tube. Next, a plastic syringe is used to withdraw 1 mL of clear liquid from a one-dram vial. The clear liquid is added to the test tube gradually and a boiling stick is used to agitate the mixture. The screen goes black except for a caption that reads: “Continue stirring…” When the video returns, we see that the previously heterogeneous mixture has become a clear, homogeneous solution.

The photo shows a small graduated test tube in a large plastic tub filled with ice. The test tube contains a boiling stick, but any other contents near the bottom of the tube are not visible. Also in the ice bath is a small Erlenmeyer flask with a glass stirring rod sticking out of it. The contents of the flask are also not visible, although a reddish brown color can be seen through the ice.

You're finally ready to add the nucleophile to the diazonium electrophile you made!
Which "-amino" starting material did you use?

2-amino

3-amino

4-amino

Page updated

Report abuse