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Fischer Projection R and S Stereochemistry Trick

December 15, 2015 By Leah4sci 24 Comments

Fischer Projection Stereochemistry to find R and S configurations Chirality Vid 6Chirality/Stereochemistry Video Series: Video 6
Fischer projections provide a simple 2-dimensional representation for complex 3-dimensional structures. Which is great for drawing complex molecules, but not so much fun if asked to determine R and S configurations.

Many books and professors will have you redraw the Fischer projection into a 3-dimensional sawhorse or skeletal structure.

I find this to be a waste of time and source of needless confusion on exams. This video shows you how to quickly and easily find R and S configurations directly on the Fischer Projection. Guaranteed to save you time on your next stereochemistry quiz/exam.

In fact, if it DOES save you time come back to this page and let me know by leaving a comment below.


(Watch on YouTube: Fischer. Click cc on bottom right for video transcription.)

Links & Resources Mentioned In This Video:

  • Fischer Projection Tutorial Video Series

<– Watch Previous Video: R and S configuration for Lengthy Complex Substituents
–> Watch Next Video: Newman projection chirality

This is Video 6 in the Chirality/Stereochemistry Video Series. Click HERE for the entire series.

Ready to test your stereochemistry skills? Try my FREE Chirality/Stereochemistry Practice Quiz and follow along with the Stereochemistry Cheat Sheet

Would a Model Kit help you? Watch How to Use Your Organic Chemistry Model Kit.

Filed Under: Chirality and Stereochemistry Tagged With: chirality, diastereomers, fischer projection, stereochemistry

Comments

  1. Brigette says

    April 7, 2019 at 11:31 am

    Wow, your videos are so much better than kaplan and khan academy. You explain everything in a really practical way, and your website is so comprehensive and easy to navigate. I can’t thank you enough, you’re really helping me with some last minute studying! Wish I had found you sooner!!

    Reply
  2. Sajeev Yadav says

    April 4, 2019 at 2:28 pm

    In your first example one of the carbon has (HHS) bonds other has (OOO) bonds ,why did you consider only S and O ,if I consider overall who wins it will be(OOO) carbon, please explain why is it so?

    Reply
  3. Bilal Biriyani says

    December 9, 2018 at 7:52 pm

    Hey great video. To save a bit a more time when the lowest priority is on the horizontal lines, you could just find out if it is R or S, then just put your answer as the opposite, since the lowest priority is facing the front. Otherwise your videos are amazing and very helpful. God bless you.

    Reply
  4. Aaron says

    March 17, 2018 at 6:08 pm

    Is the amino acid cysteine? Your videos have saved my friends’ grades as well as my own! You’re amazing

    Reply
  5. Magda says

    September 28, 2017 at 12:15 pm

    Amazing videos and the way you explain things! What seem to be impossible to figure out thanks to you and your tricks becomes a pleasure in studying 🙂

    Reply
  6. OLUWAJUWON says

    June 6, 2017 at 5:33 pm

    your teaching goes a long way helping me understand better. God bless you

    Reply
  7. RANI says

    February 3, 2017 at 7:52 am

    VERY VERY PERFECT APPROACH..MAKES ORGANIC CHEMISTRY SIMPLY BEAUTIFUL

    Reply
  8. Stamatios says

    January 18, 2017 at 11:14 am

    Keep up with your amazing job you are doing !!!…we need you ! GREAT!

    Reply
  9. Jenish says

    October 13, 2016 at 9:57 pm

    Leah You are a Great Great Teacher!!!!!!!!!!!!!!!!!!!!!

    Thank You Much!!!!!!!!!!!!!

    Reply
    • Leah4sci says

      December 29, 2016 at 5:43 pm

      You’re welcome, Jenish!!!

      Reply
  10. Anfisa says

    October 12, 2016 at 9:24 pm

    God Bless you!!!! Seriously I only learn from your videos!

    Reply
    • Leah4sci says

      October 19, 2016 at 12:48 pm

      I’m happy these have helped you, Anfisa!

      Reply
  11. kharkabuz says

    October 5, 2016 at 8:12 pm

    GREAT VIDEO! why can’t I watch the swap method video though?

    Reply
    • Leah4sci says

      December 29, 2016 at 5:46 pm

      I’m not sure, did you try via this page: https://leah4sci.com/swap-method-for-finding-r-and-s-configurations-chirality/

      Reply
  12. Amir says

    September 23, 2016 at 12:31 pm

    Wish you were my instructor.

    Reply
    • Leah4sci says

      September 28, 2016 at 4:40 pm

      I get that often! I do offer tutoring and a Study Hall membership!

      Reply
  13. method says

    July 19, 2016 at 11:11 pm

    Your the great keep on!!!!!!

    Reply
    • Leah4sci says

      August 10, 2016 at 9:03 am

      Thank you! Keep on, Keepin’ on!

      Reply
  14. Dothlyn says

    June 21, 2016 at 8:07 pm

    thanks Leah you are great teacher

    Reply
    • Leah4sci says

      June 21, 2016 at 10:30 pm

      Thanks Dothlyn

      Reply
  15. JA says

    February 25, 2016 at 5:21 pm

    That video was clear and concise. Thank you for all that you do!

    Reply
    • Leah4sci says

      April 4, 2016 at 5:33 pm

      Thanks JA, glad to help

      Reply
  16. Emma says

    February 11, 2016 at 6:45 pm

    Great video.

    Reply
    • Leah4sci says

      April 4, 2016 at 5:24 pm

      Thanks Emma

      Reply

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