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R and S Configuration using Cahn Ingold Prelog Priority Rules

October 10, 2015 By Leah4sci 23 Comments

R and S Configuration Cahn Ingold Prelog rules for ranking by Leah4sciChirality/Stereochemistry Video Series: Video 2
Chiral carbons are identified as having 4 unique substituents. Finding the Absolute Configuration – R and S comes as a result of ranking and order substituents, specifically by noting the configuration of the top 3 groups.

This video shows you how to prioritize substituents to find R and S configurations using the Cahn-Ingold-Prelog priority rules.

(Watch on YouTube: R/S. Click cc on bottom right for video transcription.)

<– Watch Previous Video: Introduction to Chirality and Stereochemistry
–> Watch Next Video: Finding R and S When Group #4 is Forward

This is Video 2 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: cahn ingold prelog, chirality, stereochemistry

Comments

  1. Akram Syed says

    January 5, 2019 at 12:11 am

    Thank u so much mam .
    You are a great chemistry teacher.

    Reply
  2. Bella says

    October 26, 2018 at 1:06 am

    You’re doing God’s work. I thank you.

    Reply
  3. Xinyan Wang says

    April 3, 2018 at 4:33 pm

    How to determine if there is a OH bonding to a carbon and the adjacent carbon has a OH as well but its not on the main chain. Like. OH–C(with other two different atom bonding)–C–OH(not on the main chain)–C(with other two different substituend)

    Reply
  4. SARA says

    February 17, 2018 at 4:13 am

    AMAZINGGGGG:)

    Reply
  5. Harshana says

    September 15, 2017 at 10:02 pm

    Thanks !! you made my all doubts clear with this video & keep it up .. teaching is well suit you .. 🙂 again thank you …

    Reply
  6. Devdatta Biswas says

    May 20, 2017 at 10:16 pm

    I love your videos. Thank you so much for them. But I have a doubt:
    How many chirality centers are there in 1,1,2 – Trimethylcyclobutane ?

    Reply
  7. Sayan Bose says

    January 2, 2017 at 9:01 am

    Greatly satisfied.I did find myself a frog inside the well on going through the orgo first time but now I feel like a free bird.Specially I liked the way you breakdown to identify R and S configurations.THANKS A LOT and….
    WISH YOU A VERY HAPPY NEW YEAR.

    Reply
  8. benjamin oppong says

    October 2, 2016 at 8:28 am

    simply educative

    Reply
    • Leah4sci says

      October 19, 2016 at 12:50 pm

      Glad to help, Benjamin!

      Reply
  9. kriishna karkee says

    November 15, 2015 at 9:50 pm

    it is helpful for me

    Reply
    • Leah4sci says

      November 16, 2015 at 2:56 pm

      Glad to help Kriishna

      Reply
  10. kriishna karkee says

    November 15, 2015 at 9:18 pm

    it is a helpful lesson .

    Reply
  11. Chrissy says

    October 28, 2015 at 9:47 pm

    Thank you so much for your helpful videos. They are very informative!

    Reply
    • Leah4sci says

      October 31, 2015 at 6:24 pm

      You’re welcome Chrissy

      Reply
  12. emykartiyen says

    October 27, 2015 at 11:10 am

    I will be glad to enroll in any school you teach

    Reply
  13. Jackie says

    October 23, 2015 at 12:04 am

    Hi, I just wanted to say thank you for being a great instructor, your videos are really good, I’m waiting for video #3 on diasteromers and rotation, I’m having a hard time with rotation…Thank You!!!

    Reply
    • Leah4sci says

      October 31, 2015 at 6:25 pm

      Thank you Jackie. Did you find video 3?

      Reply
  14. Divine says

    October 22, 2015 at 1:10 pm

    Thank you so much. I like the way you breakdown to identify R and S configurations.

    Reply
    • Leah4sci says

      October 31, 2015 at 6:25 pm

      Thank you Divine! It’s one of my favorite topics

      Reply
  15. maliha ludin says

    October 17, 2015 at 11:00 pm

    Hi leah, when will you post the next video in this series? Thanks!

    Reply
    • Leah4sci says

      October 31, 2015 at 6:27 pm

      I’ve been adding a new video every few days. Check my Youtube channel

      Reply
  16. Khushbu Ruman says

    October 11, 2015 at 6:05 pm

    Thank you so much! you are the best teacher!

    Reply
    • Leah4sci says

      October 11, 2015 at 11:33 pm

      Thank you and you’re very welcome 🙂

      Reply

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