Spectroscopy worksheet Orgo 2 (1)

Take a look at the reaction in the first image that give two products A and B The second picture shows the DEPT 90 (TOP) and DEPT 135 (BOTTOM) of the compound that was isolated as only product of this reaction: In both spectra there are 7 signals between 120 and 140 ppm. How can you use these DEPT spectra to establish if product A or product B was formed in this reaction? Explain your reasoning.

Q8. How would you distinguish the following molecules using IR and Mass Spectrometry? Please label at least two differences for IR and two for MS. Please draw the mechanism for the formation of fragments which can distinguish the two molecules via mass spectrometry. HO

refer to image please please label graph and show all work. CALCULATE R VALUE AND EXPLAIN.   will only rate if graph is labelled.   label name of structure too.

Analyze the spectra and write the name of compound. Also write brief explanation for each spectra verifying the parts of your suggested molecule ( for IR indicate the functional groups which match is the peaks. for mass indicate the fragments. for CNMR an HNMR indicate which peak belongs to what).

2) The IR spectrum below is of one of the compounds shown. Circle structure that corresponds to the spectrum and label the peaks you used to make your choice. Transmittance (%) OD D 4000 3000 my mm 2000 1500 Wavenumber (cm-¹) 1000 500

19. For the following reaction, which of the following change(s) in the IR spectrum is consistent with conversion of the reactant to the product? DMSO A. absorption at 3200-3600 cm should disappear B. absorptions at 3200-3600 cm and 1100 om should disappear C. absorption at 1100 cm should disappear, a new absorption at 3100 cm should appear D. absorption at 1720 cm should appear, absorption at 3200-3600 cm should disappear E. none of these O A O B O D O E

2) On spectra 2 are the mass, IR and 13 C and 1 H NMRspectra of an organic compound.a) From these spectra, determine the structure of the molecule. Rememberto ignore the triad in the 13 C NMR spectrum at 7 ppm that comes from theNMR solvent. b) Draw the structure of the molecule and label each hydrogen with a letter(A, B, C...). Then fill in the peak assignment table below.  hydrogen chemical shift integration splitting pattern couples to

NAME PRELAB QUESTIONS These questions should be answered before coming to lab, and included when you turn in your lab outline and data sheets. 1. The dissolved compound in a sample has an absorbance value of 0.250. How would you expect the absorbance to change if: a. The concentration of the dissolved compound is tripled? b. The concentration of the dissolved compound is halved? 2. If you have a solution of unknown concentration, describe how you could determine the approximate concentration. 0.S a.r 0.1 6.0 0.0

5. Which IR signals will (a) appear and (b) disappear in the synthesis shown below. Explain your answer. H2O/H* K2Cr207/H* A B

Steps in Spectral Identification: •Identify major peaks in IR spectrum, if any. •Deduce structural fragments for each of the 1H NMR spectral signals. •Give the structure of the compound •Assign the signals in the 1H NMR spectra to specific protons •Assign carbons to the peaks in the 13C NMR spectrum Step 1. Calculate the degree of unsaturation for the unknown. Step 2. Determine the functional group from IR Step 3. Analyzing the MS spectrum Step 4. Analyzing the 1H NMR spectra Determine the number of different kinds of protons Step 5. Analyzing the 13C NMR spectra

LAB Q1. Draw the structure of the synthesized product (do not include side or by products). How can IR spectroscopy be used to monitor the progress of each of the following reactions (if reaction went to completion and/or check the purity of the final product)? What absorptions would be observed in the IR spectrum? And if IR spectroscopy could not have been used, briefly explain why.

Identify the spectra. All pertinent peaks must be assigned on spectrum (5-6 peaks). Label the peaks on spectrum.  I have provided the correct structure in the lower left hand corner, I just need help with labeling the peaks on the spectrum to match the structure.

Please see attached image and please choose a structure (also attached) that matches the IR spectrum and show key IR absorptions and H-NMR and C-NMR peaks to support your chosen structure

Please give explanation too

Please answer the question correctly is all I want and explain why its thats answer for the final and please answer as quickly as possible, thanks!

Identify the spectra. All pertinent peaks must be assigned on spectrum (5-6 peaks). Label the peaks on spectrum.  I have provided the correct structure in the lower left hand corner, I just need help with labeling the peaks on the spectrum to match the structure.

draw the strucutre based off the IR spectrum, 1H NMR spectrum, and 13C NMR spectrum for this compound. This compound is prepared from the anti-Markovnikov addition of water to phenylacetylene. Its molecular formula is C8H8O.

What is the expected IR absorptions you would expect to see from the following molecule? OH If you were to take the IR of the starting molecule and then the product after the reaction is complete which IR absorption peaks will disappear and which will appear? Give absorption number and what part of the molecule that absorption references. H3O*

Refer to image, answer clearly and show work. Label graph!! Will rate if work is shown.

None

Refer to image, answer clearly and explain. Label the graph, draw the structure and I will rate!

Please let me know what these two IR spectra are of? Which is Aromatic aldehyde and which is a ketone?

Same way of answering please just like what you did on question above. Thank you

help

(plz with detaol explanation )

can you please solve this question correctly?        Please type answer note write by hend.

Can i get help with this question please