Organic Chemistry NMR (1) of (4) - Intergration Line

[marioboy90]

WTF is said at 1:46?

[rainbowhope2]

If i had a compound with more than 2 peaks, will i have to times all the peaks by, say, 2 or just the peaks involved?

Thanks for your video!

[luvpheonix4ever]

Excellent help and supplement! You're awesome!



[smithynakka]

thanks!

[chamags]

i want to kill you. this has been bullshit

[angushoho]

thank you!!!!!

[thefeeps]

Thanks a bunch! This is the reason i love youtube, I can learn stuff :D

[gmuimui]

thank you so so much for this video!!! it makes a LOT of sense now!!

[clonedpig]

can you explain that ratio part.. 7.0/1.6... which is measured from the integration line.. but why do you multiply it by 2 afterwards... (or where does that 2 come from)? thanks!

[YourFormulaSheet]

1:4., let's put in illustration that... 1 hydrogen to 4.4 hydrogen for the graph. In reality, there is no 4.4 hydrogen. We cannot use half hydrogen. When these ratio times 2 to gives us 2:8.8, then 8.8 is more close to 9 and that way is more acceptable.

[MarcusDiMarco7]

Where you calculate the ratio of Hydrogen's it is very difficult to understand what you are doing and how you used that information in the problem.

[YourFormulaSheet]

The integration of the lines are the ratios of the hydrogens. Most test questions should not concern about these x2 but here for example: 1:4.4 cannot tell you the real numbers of hydrogens ...Because, there is no half hydrogens. Like in the Empirical formula, we need to round the number as close as possible to integer number.

[Willxdiana]

og nmr is so evil, that's the only part of ochem im not very confident in.

[intermission101]

Very informative video. SImple and easy understand. Keep up the good work

[zzz11y]

good job!

[mikeybruises]

Excellent and informative videos. You have a knack for presented the information in way that any novice can easily understand. Don't lose the accent.

[yes4me]

OMG!!!! F*** AWESOME!!! I didn't understand my lecture and book for months!!! OMG!!! THANK YOU!!!!

5/5

[MrCrawford]

thanku ur videos are very informative. great for helping me studying for OC course!

[pawaE]

OH!

T^T Thx a lot!!

I'm studying Org.Chem as my main subject[Is my english right??Hah hah]

You're so generous!!

I'll take a look around your videos later..

My final exam fighting!!

[abdu0017]

Hi! U seem to know quite a lot on NMR! One thing that is quite difficult to visualise is the T2 relaxation (SPIN-ECHO) part. I cant find any videos of it on youtube, so that could be something that u may want to upload! Thanks for all your videos!

[YourFormulaSheet]

You were right !! I know quite a bit NMR but T2 is the one thing I did not know. : )

I am sorry I did not have these information right now.

[abdu0017]

1) Yeah! I've discussed with my prof on the T2 relaxation part. At first, the spinning proton is given a 90 degrees pulse, its magnetization vector now points at the y-axis. This single magnetic vector will now decay and split into multiple vectors precessing at different speed about the y-axis.

[abdu0017]

2) Next, a 180 deg RF pulse is applied at the Y-axis. This causes the splits of magnetizations to shift and point at the -y axis. Differences in precessing speed of these splits, causes them to refocus (merge) at some point. The time taken for this to occur defines the T2 relaxation and its unique for different atoms. Yeah, juz to share! Thanks for your videos!

[t3sla4]

Good video just one note...benzene's downfield multiplicity is due to the induced magnetic field by the pi electrons in benzene being in the same direction as the applied field.

[YourFormulaSheet]

Thank you thank you!