How would you evaluate how many possible H-bonding sites a molecule has?
The specific question is slide 9 on the review powerpoint:
"The DNA double helix structure was determined in 1953 and found to involve intermolecular H-bonding between DNA bases present within the helix. Below are two DNA-bases: Adenine (A) and Thymine (T) For each base give the maximum number of possible H-bonding sites with water molecules. (Lone pairs are not included in the structures.)"
https://lavelle.chem.ucla.edu/wp-conten ... w_Zoom.pdf
Thanks!
Sites of Hydrogen Bonding (Review Powerpoint Slide 9)
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Re: Sites of Hydrogen Bonding (Review Powerpoint Slide 9)
Hi, so I'm also a little iffy on hydrogen bonding sites, but hydrogen bonds are formed between a hydrogen atom bonded to a strongly electronegative atom (like N, O, and F) of one molecule and a N, O, or F of another molecule. The lone pairs of these electronegative atoms form hydrogen bonds. So for A and T, I looked for lone pairs of N and O and looked for H that were bonded to N or O. As a result, I got 8 sites for each, and I showed them in a drawing below (the drawing was so I could visualize it easier so it may not be perfectly accurate, though it gets the point across). Hopefully this helps, and if someone could double check that'd be great!
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Re: Sites of Hydrogen Bonding (Review Powerpoint Slide 9)
Thank you for such a thorough answer! I really appreciate it.
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