We have added the functional groups list Melissa used in this video to the downloadable pdfs. You'll find that under the video's description. 

R1 and R2 mean they are two different alkyl groups. You can also see this shown as R and R' and R"

R means the rest of the carbon chain, so when you see an R there it means there's a substituent made up of only C and H, this is referred to as alkyl groups.

Thank you Vanessa! We are happy you are here and that you are loving the Study with us series :) 

At this time, no we do not have any videos on biological reactions. 

But you can ask our AI questions and it does a really good job answering. 

Here's an example of a response from our AI when asked to explain the mitsunobu reaction : https://chemmunity.com/pages/ai?c=9031f38f-be72-4414-9c22-655321e2d292

Hi Mona, 

We kindly ask to keep the comments relevant to what is discussed in the video. Our subject experts only respond to questions about what is in the video and unfortunately do not answer questions outside of this. But we do have videos on NBS that you can check here:

Ashish Kotkar Of course, we appreciate your honesty and I'll let Melissa and the team know. 👍

Thank you for your feedback Ashish, we understand that everyone may have a preference for certain instructors and we do our best to offer a variety of helpful videos. Of course, Melissa is definitely working on adding more videos and we are glad you are happy with her teaching. 

We do plan on having downloads available, our team is currently working on adding pdfs to go with each lesson video.