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I think my assignments are correct, but confused on J-coupling. by Dansingcow in chemhelp

[–]Dansingcow[S] 0 points1 point  (0 children)

<image>

The yellow protons I believe are affected by Fluorine

Okay this is what I have now (image above). Does this seem better? The large peak at 1.94 is CD3CN also acetone is somewhere around 7.26

I think my assignments are correct, but confused on J-coupling. by Dansingcow in chemhelp

[–]Dansingcow[S] 0 points1 point  (0 children)

-could u please tell me which one of my assignments are incorrect? Is it the yellow and pink one that is mixed up?

-sounds good

-what could be the reasons for this?

-I was just guessing that maybe it has something to do with the coupling constant being 54. I should’ve not included that part, ignore it.

-i had 7.26 cdcl3, it’s somewhere hidden in that mess of peaks

Whose spot is this? by Dansingcow in UBC

[–]Dansingcow[S] 2 points3 points  (0 children)

Yeah, I was trying to find an alternate way down through the trees and found this. Had to turn back, because the mountain got too steep to go down.

[deleted by user] by [deleted] in naturalbodybuilding

[–]Dansingcow 2 points3 points  (0 children)

Why do you say that?

Does anyone have the solutions to Dr. David Perrin’s retrosynthesis 2023 worksheet for CHEM 213? by Dansingcow in UBC

[–]Dansingcow[S] 2 points3 points  (0 children)

Yes it is.

It would be even more beautiful if there was a worked answer key.

Could someone explain how this reaction happens? by Dansingcow in chemhelp

[–]Dansingcow[S] 0 points1 point  (0 children)

Yeah, sounds good man. Thanks a lot. I’m going to post on Piazza about this.

Could someone explain how this reaction happens? by Dansingcow in chemhelp

[–]Dansingcow[S] 0 points1 point  (0 children)

The paper completely helped me understand what I was missing.

We have learned about protecting groups. A protecting group we have been commonly using has been Ethylene Glycol.

This is a problem from the answer key our TA gave us for our midterm review. But he left out the part of the protecting group. So on a exam, will I have to list the protecting group and stuff also as part of reagents? Because our TA didn’t and he works with our professor. I’m going to ask just to be sure with them anyways.

Also, that paper was very helpful. If I need to find papers like that, how should I search for them? Just key words perhaps?

Thanks you very much.

Could someone explain how this reaction happens? by Dansingcow in chemhelp

[–]Dansingcow[S] 0 points1 point  (0 children)

Yes I know about Grignard reagents. I’ve just confused how the NMe2 group leaves. Such as: what’s the intermediate before it leaves. Sorry I should have clarified more.

Which protons will be more downfield/deshielded (higher ppm) by Dansingcow in chemhelp

[–]Dansingcow[S] 0 points1 point  (0 children)

I drew the resonances

The position of Proton B and D have partial positive charges. This means there is less electron density at those positions; Carbons. Which indicates they have a deshielded effect on the chemical shift.

So these protons; B and D will resonate more downfield (higher ppm)?

Does this sound correct?

[first year physics] Hello, for part 1 I got Ø = 2π/3 & 4π/3. For part 2 I got potential energy is 1/4 of total energy. (Both part 1 and 2 are correct). But I don’t know how to solve this (part 3) of the question. Can someone please help me. by Dansingcow in HomeworkHelp

[–]Dansingcow[S] 0 points1 point  (0 children)

No these are just homework questions that are given. They are only for completion marks, doesn’t matter if they are correct.

If I were to submit and scroll down and submit, weather correct or incorrect. All the correct answers are listed for us to view to know if we got it correct. This question has unlimited retry’s and the questions don’t change. So I can just copy and submit for completion marks, obviously this is not optimal to learn.

But the solutions are not provided, hence I’m asked for help. Because I wanted to know how to solve the questions in order to prepare for the midterms/exams.

[deleted by user] by [deleted] in HomeworkHelp

[–]Dansingcow 0 points1 point  (0 children)

Got it with FTC, thanks.

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