2 quick Ochem questions before my DAT tomorrow!!!!

[EmanUT]

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Just to clear this up...

When adding HBr in peroxides (ROOR) or UV, it adds anti-Markovnikov
When adding Br2 in UV, it forms the most stable radical intermediate

Second thing is boiling points of aromatics. I know that electron withdrawing groups make the aromatic more acidic (Ph-NO2 is more acidic than Ph-NH2). Do the more acidic aromatics also have higher bps?

Thanks so much and hopefully tomorrow will be a great day!

 

[dat_student]

Just to clear this up...

When adding HBr in peroxides (ROOR) or UV, it adds anti-Markovnikov
When adding Br2 in UV, it forms the most stable radical intermediate

yes

Second thing is boiling points of aromatics. I know that electron withdrawing groups make the aromatic more acidic (Ph-NO2 is more acidic than Ph-NH2).

yes

Do the more acidic aromatics also have higher bps?
..

I've never heard that acidic aromatics necessarily have higher boiling points. "Boiling point" is a function of intermolecular forces. For example, NaCl (Solid) has a very high boiling point. Carboxylic acids have high boiling points (not because they are acidic but because each -COOH group can form 2 hydrogen bonds). etc

Thanks so much and hopefully tomorrow will be a great day!

Good luck.

 

[RockstarDMD]

yes



yes



I've never heard that acidic aromatics necessarily have higher boiling points. "Boiling point" is a function of intermolecular forces. For example, NaCl (Solid) has a very high boiling point. Carboxylic acids have high boiling points (not because they are acidic but because each -COOH group can form 2 hydrogen bonds). etc






Good luck.

I concur. Good Luck!

 

[AshDDS2B]

Just to clear this up...

When adding HBr in peroxides (ROOR) or UV, it adds anti-Markovnikov
When adding Br2 in UV, it forms the most stable radical intermediate

Second thing is boiling points of aromatics. I know that electron withdrawing groups make the aromatic more acidic (Ph-NO2 is more acidic than Ph-NH2). Do the more acidic aromatics also have higher bps?

Thanks so much and hopefully tomorrow will be a great day!

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