Recent content by duchuy

Oooh ok I see thank you so so much you're absolutely amazing

I would make my reaction in a Deanstark for the final fischer esterification? I honestly don't know, I'm just doing chemistry on paper I really don't have much lab experience. But what do you think about my proposition?

Ok I see, but from what I see from writing the reaction, is that if I were to do transesterification to from 5 to 6 in acidic conditions, that would be a totally reversible reaction and how could I ensure the formation of the cycle? Since I can't use an excess of reactants right? Unless I...

Hi, I'm trying to solve the number 5 and 6. Now I'm wondering what happens when I add H2/Pd/C on the 4th (after the question 4) molecule. I know that it will reduce pi bonds to sigma bonds, but will it affect the cetal group? Because if it does't I'm not quite sure that I'll be able to do the...

But if hemiketal turns back to ketone after I add water, and even ifI have alcohol in the solution, i'd no longer be able to turn that ketone into an alcohol no? Because all of my RMgX will be consumed from the moment I add water in the solution? So is it possible to end up with ketones as side...

Hi, I have a question regarding these 2 possibilities: Why does the addition of RMgX on an ester always form a ketone? We could very well have that tetrahedral intermediate without eliminating the alcoolate group no? Since your reaction pretty much always tend towards the formation of a weaker...

But doesn't isothermal mean constant temperature? So at constant T, if the variation of entropy is 0, dQ must also be equal to zero no? :(

Thank you so much sir! I love your dedication, and I wish you an amazing new year ahead.

I think for reversible processes the total variation of entropy is equal to zero because dQ = 0. I think it's like pumping your bike in two different ways : 1) You do it very fast, entropy is generated and heat is also generated, and you can feel it by touching your bike pump. This process is...

I'm not quite sure for the name in english but in french it's acide paratoluène sulfonique. The formula is : H3C-Ph-HSO3. I also have a question regarding protecting groups. In a molecule where I have both a RCOOH, or ester and amide group, will I be able to use ethylene glycol or Corey Seeback...

Hi, I am trying to solve number 8. At 7, I have a molecule that contains both an amide and ester function. So when I use LiAlH4, will I reduce both the ester to alcohol and the amide to secondary amine? Or just the ester? Thank you so much for your help!

Oh okay thank you sir!

Hi, I am trying to determine the velocity of the particle with the mass m coming out of the acclerator. I tried writing : Ep(i) + Ec(i) = Ep(f) + Ec(f) Ec(f) = Ec(i) - Ec(f) But at this step, I'm no longer sure how to express Ep with V because : In my textbook, it's written : Ep = 0,5...

I don't understand why in order to make RI from ROH, you'd have to use FINSKELSTEIN condition: ROH + PBR3 --> RBr RBr + NaI --> RI + NaBr and not directly ROH + PI3 --> RI Thank you so much for your help! Pardon me if my english is not correct. <mentor edit>

Thank you for your answer but I am not quite sure i'd know how to write the mechanism if i start with the ene side. Do i still form a ring of 4 or when i break the pi bond, it would go to the more electronegative oxygen?