Is the Polarity of Large CHO Compounds Affected by Size and OH Group Position?

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SUMMARY

The polarity of larger compounds, specifically lignans like Hydroxymatarésinol (C20H22O7) and tannins such as taxifoline (C15H12O7), is significantly influenced by the presence and positioning of -OH groups. Compounds with -OH groups are generally polar, but their overall polarity can be affected by the size of the molecule and the specific locations of these groups. When -OH groups are positioned on the exterior of the molecule and exhibit greater acidity than typical alcohol groups, the polarity of the compound increases. This relationship highlights the complexity of molecular polarity beyond the mere presence of functional groups.

PREREQUISITES
  • Understanding of molecular structure and functional groups
  • Knowledge of polarity and intermolecular forces
  • Familiarity with organic compounds, specifically lignans and tannins
  • Basic chemistry concepts related to acidity and solubility
NEXT STEPS
  • Research the influence of molecular size on polarity in organic chemistry
  • Study the role of functional group positioning in determining compound properties
  • Explore the acidity of alcohol groups in organic compounds
  • Investigate the polarity of various lignans and tannins through experimental methods
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Chemistry students, organic chemists, researchers studying molecular polarity, and anyone interested in the properties of lignans and tannins.

paraflax
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Hello!
Does anyone have information or knowledge on the polarity of larger CxHyOz compunds?
To be more specific, the compunds that I'm interested in are different kinds of lignans such as Hydroxymatarésinol (C20H22O7) and tannins such as taxifoline (C15H12O7) just to name a few.

As I understand it, compunds with -OH groups tend to be polar so I want to say that they are polar, but I'm wondering if the size of the compunds and/or the positions of the OH-groups have any influence on the overall polarity?

It's for a report want to be able to back up my claims of polarity or non-polarity with more than just the -OH groups argument =)

Any help will be greatly appreciated =)
 
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paraflax said:
I'm wondering if the size of the compunds and/or the positions of the OH-groups have any influence on the overall polarity?

Yes & yes.
 
As I thought, would you mind explaining it a bit more if you can?
 
Sorry, I can't.

Don't get me wrong - it is not that I don't want to help, but the topic itself is worth a thick book.

In general if the -OH groups are at the "outside" of the molecule, and if they are more acidic than typical alcohol groups, you can expect the molecule to be more polar. But it is just scratching of the surface.
 
I was afraid of that, but thanks anyway. I'll keep looking.
 

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