Experiment 11B.docx - 5509435 Experiment 11B The Aldol Condensation The purpose of experiment 11B is to learn and understand the aldol condensation

Experiment 11B.docx - 5509435 Experiment 11B The Aldol...

This preview shows page 1 - 2 out of 2 pages.

5509435 Experiment 11B: The Aldol Condensation The purpose of experiment 11B is to learn and understand the aldol condensation reaction. Aldol condensation is an aldol addition reaction followed by an acid- catalyzed or base- catalyzed dehydration. Meaning at the end of the reaction, it’ll produce a water molecule. Students will also make decisions about which solvents are best suited for recrystallization. A cross aldol condensation that uses aldehydes without alpha-hydrogens has its advantages in product yield. In a crossed aldol condensation with alpha hydrogens will produce four different products which isn’t synthetically useful. But when having a carbonyl compound that doesn’t have alpha-hydrogens reduced the possible number of products from four to two because no enolate ion is formed. When a carbonyl compound “with a-hydrogens is added slowly to a solution of the carbonyl compound without a-hydrogens and a base,” the possibility of it reacting with another carbonyl compound with alpha-hydrogens “will be minimized because there is a much greater concentration” (Bruice 821). Therefore, by this process it reduces how many possible products can be obtained from two to one and the yield is then ~90%+ H2O. To start the experiment, students decide what initial two reagents to use to guide the overall experiment. For this experiment the regents used were Benzaldehyde and Cyclopentanone. By weighing the conical vial where the initial reagents would be mixed, the mass of each reagent introduced will be determined for each mL added. The mass of each reagent was then 0.43g(~0.4mL) of benzaldehyde and 0.091g(~.1mL) of Cyclopentanone. Then, after having added 95% ethanol and 2M of NaOH to the solution, it would complete the necessary reagents for the aldol condensation reaction. A precipitate will form as a yellow with
Image of page 1
Image of page 2

You've reached the end of your free preview.

Want to read both pages?

  • Fall '19

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern

Stuck? We have tutors online 24/7 who can help you get unstuck.
A+ icon
Ask Expert Tutors You can ask You can ask You can ask (will expire )
Answers in as fast as 15 minutes
A+ icon
Ask Expert Tutors