Chemistry
posted by Tracy .
Hey;
I'm currently in a kinetics class and I am trying to do a prelab for a lab that we haven't learned the material for yet and I'm really stuck, and we unfortunately don't have a textbook for the class so I was hoping someone could help. We have the compound mxylene and it gives the structure (you can get it on the internet too), first it asks how many nonequivalent protons there are...now I know the definition of nonequivalent protons but I have no idea how you can tell where the spins are equal or not...is it because it is the same element? The second question asks what coupling pattern you would expect based on the structure...now as far as I can tell it is based on the nonequivalent protons is it not? That deteremines how many peaks it has? I'm not sure. Lastly, they want a sketch of the 1H spectra showing the splitting pattern and relative position of each signal...this I'm totally lost at. I know the amount of peaks should be equal to the nonequivalent protons..or so I think..but I don't know how you would know how many bumps in the peak, or where the signals would be...I'm so lost.

See if this will help.
http://www.chem.ucla.edu/cgibin/webspectra.cgi?Problem=bp22&Type=H 
That does help for at least seeing what the spectrum will look like, but I still don't get a few things...how do you know what the equivalent protons are? How do I know the coupling pattern? Would it be a triplet because it has 3 peaks..or is that something totally different? And how would I know the position of each signal on the spectra, I mean i would assume was a peak but how would I tell which is which? Would that mean there is 3 non equivalent protons?
Respond to this Question
Similar Questions

Kinetics
I'm really struggling to understand this chapter in chem class, partly due to an inadequate math background. does anyone have any tips for learning kinetics? 
Chemistry
Hey; I am doing a lab write up that has to do with NMR spectroscopy. Part of it asks to determine how many nonequivalent protons are in the compound 2chloro6methylaniline, among other things. My problem is this is for kinetics class … 
Honors Chemistry
We did a lab in class on Friday where we stuck a metal loop in various chemicals and stuck it in the flame of a Bunsen burner and we observed the flame's colors as the different metals went in. For every lab we do, we have to write … 
Grammar
Write one paragraph (150 word minimum) about the most helpful information you have learned from your other second block course on how to make financial decisions. Identify the topic sentence by [] and the clincher by {}. **Is this … 
Chemistry
Hi there  My labs and lectures aren't in synch at the moment so we are now doing a prelab that is asking for info I haven't been taught yet uggg... The prelab question I'm having trouble with is as follows: What is the volume at STP … 
Economics
Im trying to figure out my grade what would i need to get a c average in the class;39%,of my grade is is based on 3 assignments(i got so far 62%,80%,haven't done the last assignment yet), 3 exams each worth 20%( i got a 2%,40%, haven't … 
English
I urgently need you to check these sentences on the present perfect. Thank you. 1) I've just come back from the studio where we were rehearsing/practising(exercising/training are mistakes? 
Math: Linear Equation
I have not learned this yet in class and I am stuck on this homework problem. Graph the linear equation by using a table of solutions. 3x4y=12 
Algebra
You have 400 feet of fencing to enclose a rectangular plot. Find the length and width of the plot that will maximize the area. What is the largest area that can be enclosed? 
Chemistry
I did a lab, an kinetics lab (iodide clock) and in my lab report I have to calculate the initial rate in mol L1 s1 and I'm not sure how to do that. I have the [I] and [S2O82] in mol L1 already. The reagents are [KI] [NaCl] [Na2S2O3] …