Ochem Questions

[Pinbear]

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i have several questions regarding organic chemistry

Q1. Strength of electron donating group between -OH, -NH2, -CH3, H

Q2. Stregnth of Basicity between NaOH and LiOH. Which is a stronger base?

Thank you!

 

[SuperCool101]

for your Q1:
I think the strength goes like this:
Electron Donating Groups (Activators in the ortho or Para position and they reduce acidity, making it more basic)
NH2 > OH > CH3 > H

 

[CANgnome]

nitrogen is the most donating group known, followed by O and C. H is neutral

 

[chromosome21]

for your q1:
I think the strength goes like this:
Electron donating groups (activators in the ortho or para position and they reduce acidity, making it more basic)
nh2 > oh > ch3 > h

+1

Where did you find q-2? For DAT purpose, NaOH and LiOH both have first group metals, they both should dissociate completely in water. Therefore, they both are equally strong base. To answer your question, though, LiOH is slightly stronger base than NaOH.

 

[orgohacks]

+1

Where did you find q-2? For DAT purpose, NaOH and LiOH both have first group metals, they both should dissociate completely in water. Therefore, they both are equally strong base. To answer your question, though, LiOH is slightly stronger base than NaOH.

They should be roughly similar, but if you check electronegativities the O-Na bond is going to be weaker than the bond. What this means is that in solution is that for NaOH the HO- group is going to be more dissociated from the metal and therefore be more "free", hence more basic. Shouldn't be a strong effect though.