Recent content by duchuy

  1. duchuy

    Which ether solvant must we ban when making grignard reagents?

    Hi, I'm I supposed to find an ether with acidic hydrogens or a very strong electrophilic centre? I'm trying with acidic H but it doesn't seem to be working... Please help me thank you!
  2. duchuy

    Maximum flame temperature during Combustion of CH4

    Thank you sir! My excuses for my math. They gave the heat capacity of N2 for the following question that asks about the combustion in 20% O2 and 80% N2. This question is for combustion in 100% O2. But again, thank you so much for your help! By the way, I found 2280K for the combustion in 20%...
  3. duchuy

    Maximum flame temperature during Combustion of CH4

    Hi, I have to calculate the maximum flame temperature of the reaction above. The answer is 4805K but I didn't manage to obtain that answer. Please help me find my error, thank you so much! The values of C are below the solution attempt.
  4. duchuy

    Chemistry Methylation of glucose (mechanism)

    Hi, I don't understand why this correction would be a nucleophile substitution? From what understand : The O atoms in the cyclic glucose acts as nucleophiles. ICH3 is also a nucleophile due to the presence of iodine's "non bonding electron pairs" (sorry I don't know the right term for this), and...
  5. duchuy

    Chemistry E1 reaction on levosalbutamol

    Hi, I have to determine the reaction mechanism of this molecule. Can someone please explain to me why the reaction would occur on OH (A)? Is it bc you can't have 2 pi bonds next to each other and OH(A) is the only polarised bond in the molecule where it would easily break off and form a double...
  6. duchuy

    Chemistry Carbocation stability

    Hi, Sorry in advance if the vocab is incorrect, i'm translating this from french. In the correction, it's written that the 4th carbocation is the less stable due to the attracting inductif effect of the carbonyle group. But isn't this carbocation stabilised by the mesomer effect of the C=O bond...
  7. duchuy

    Chemistry Elimination reaction (E2)

    Hey, I have this equation in which I have to determine its reaction mechanism. I managed to determine how we managed to obtain this the molecule in the picture above, but I don't understand the mechanism behind obtaining the second alkene. Thank you so much for your help, and sorry if the...
  8. duchuy

    Chemistry Carbocations stability

    Thank you for your reply sir!
  9. duchuy

    Chemistry Carbocations stability

    Hi, I have to determine which molecule ( 2 and 3) is more stable. I tried to determine the stability using the inductive effect, but when I tried to that, I ended with molecule 2 being more stable than molecule 3 since: x3 ch3 will push electrons towards c+ Whilst in the 2nd molecule the is a H...
  10. duchuy

    Iodine 131 β- disintegration

    Ok I see thank you so much for your help. So in case where I'm using I-131 to detect hyperthyroidism by scintigraphy, the sensors should surround the patient completely because gamma photons are emitted in all directions right? And again, sincerely, thank you sir!
  11. duchuy

    Iodine 131 β- disintegration

    What's happening in the diagram is actually what's troubling me. Iodine's nuclei decays into an excited xenon atom. The excited xenom atom emits gamma photons to attain a lower and stable energy state by emitting gamma photons. Therefore the nuclei that emits gamma photons is the excited...
  12. duchuy

    Iodine 131 β- disintegration

    Yes, sorry, I am talking about I-131. But I don't understand how the gamma photon is produced and I can't seem to find an explanation for the origin of the gamma photon emitted by I-131's nucleus. I see how gamma radiation is produced by the excited Xe nucleus, but not by iodine's.
  13. duchuy

    Biology Iodine 131 for hyperthyroidism (β- disintegration)

    Hi, I'm struggling to understand an answer in my MCQ. It states that a scintigraphy would detect γ photons emitted by the iodine's nucleus, and the answer was correct. But I don't understand how it would detect γ photons from the iodine's nucleus since it disintegrates by forming Xe*, an...
  14. duchuy

    Iodine 131 β- disintegration

    Hi, I'm struggling to understand an answer in my MCQ. It states that a scintigraphy would detect γ photons emitted by the iodine's nucleus, and the answer was correct. But I don't understand how it would detect γ photons from the iodine's nucleus since it disintegrates by forming Xe*, an...
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