Want to Learn More on this Topic: Learn to Draw a Fischer Projection Starting from a Haworth (Backwards): ruclips.net/video/fBVx-i_Ehmc/видео.html Cyclic Acetals and Ketals: Step by Step Reaction: ruclips.net/video/whVLjQhx3FI/видео.html
Thank you for your Video! You’re very good at explaining! 😊 My question would be: how do you figure out alpha and beta with pentapyranoses like alpha-L-Arabinose since it doesn’t have the CH2OH group?
Thank you so much! Those ones are a little strange being that they can become the 5 ring or 6 ring structure. I know that alpha and beta are still based on if the OH group is written down or up. L or D would be based off the original Fischer projection or chirality of the molecule. I may be incorrect, but i believe the 5 member ring isomerizes into the 6 member ring. The labeling is based off what the 5 member ring would have been for a molecule like arabinose… so if the 5 member furanose structure was alpha-L then the pyramids structure would also be alpha-L even though it does not have the CH2OH group. As long as you draw the Haworth projection. I would say the alpha or beta notation would be based off how the OH is pointed, which both of them would be possible to exist.
Want to Learn More on this Topic:
Learn to Draw a Fischer Projection Starting from a Haworth (Backwards): ruclips.net/video/fBVx-i_Ehmc/видео.html
Cyclic Acetals and Ketals: Step by Step Reaction: ruclips.net/video/whVLjQhx3FI/видео.html
you saved my biochem grade, Thank you!!!
Love to Hear it!
Thank you very much. I really appreciated the video, because it helped me to understand beta and alpha Haworth projections.
You are absolutely welcome :) I am so happy that it helped you. I wish I was able to put these out faster for all of you students :)
You are the best wow it's been so helpful indeed
I'm so glad that it was helpful!
thank you very much!
You are absolutely welcome :)
This was super helpful
Glad you think so!
This is a great hack . Thank you sm
Really helpful thank you ❤
Thank you for your Video!
You’re very good at explaining! 😊
My question would be: how do you figure out alpha and beta with pentapyranoses like alpha-L-Arabinose since it doesn’t have the CH2OH group?
Thank you so much! Those ones are a little strange being that they can become the 5 ring or 6 ring structure. I know that alpha and beta are still based on if the OH group is written down or up. L or D would be based off the original Fischer projection or chirality of the molecule.
I may be incorrect, but i believe the 5 member ring isomerizes into the 6 member ring. The labeling is based off what the 5 member ring would have been for a molecule like arabinose… so if the 5 member furanose structure was alpha-L then the pyramids structure would also be alpha-L even though it does not have the CH2OH group.
As long as you draw the Haworth projection. I would say the alpha or beta notation would be based off how the OH is pointed, which both of them would be possible to exist.
Thank you so much for your detailed answer!
I will totally look more into what you described!
All the best from germany 😊
@@anjac8131 You are very welcome! Hopefully, it was able to help a little bit. Best of luck with your studies!