Consider the spectroscopic techniques (short answers please)

1) what kind of photons do NMR instruments detect?

2) what do these photons tell you about the molecule being scanned?

3) what kind of photons do IR spectrometers detect?

4) what do these photons tell you about the molecule being scanned?

5) what advantages and disadvantages do each technique have?

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Question 1: Watch the series of videos found here and hand in your responses to the red parts below:

https://www.youtube.com/watch?v=QSztChmDY44&list=PLaySzQJTCO1kxtP1zdoysPWoFmDHl2dLb

a. Spectroscopy (NMR, IR, Mass spec) Introduction (just watch the first 4 minutes, 45secs, the rest is an advertisement)

b. Proton NMR - How to Analyze the Peaks of H-NMR Spectroscopy (list the four factors covered in the video--i.e. the characteristics used to match the peaks to the regions of the molecule; watch the first 10 minutes, 32 seconds and move on to the next video)

c. Proton NMR Spectroscopy Analysis Using C3H7Cl (draw the H NMR spectrum and label it (hint: it corresponds to 1-chloropropane or 2-chloropropane); explain to me how symmetry, the number of types of hydrogens (peaks) and splitting patterns helped you to match the spectrum to the molecule you chose; watch the first 6 minutes, 10 seconds)

d. *H-NMR Example Matching The Molecule To The Graph (draw the H NMR spectrum, labeling the ordered peaks with integrals/heights, shifts (i.e. ppm), splitting (i.e. is it a singlet, doublet, etc. peak) and use arrows or labels to match the peaks with the corresponding H's on molecule A

e. *H-NMR Example (cont) Matching The Molecule To The Spectroscopy Graph (draw the correct H NMR spectrum, labeling the ordered peaks with integrals/heights, shifts (an estimate or range is ok), splitting (i.e. is it a singlet, doublet, etc. peak) use arrows or labels to match the peaks with the corresponding H's on molecules B, C, D, and E -

f. Degree of Unsaturation aka Index of Hydrogen Deficiency (tell me how you can determine whether there are pi bonds/rings, how do you know how many pi bonds; also how do Oxygen, Nitrogen and Halogens change the hydrogen count; what formula can you use to account for all these effects ; watch the first 15 minutes, 15 seconds) This is going to help you draw the molecule based on the molecular formula and spectroscopy

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