Chapter 12 IR Bonus Homework Answers

13. Use the chemical formula and the 1H NMR spectrum to determine the structure of the molecule. You must show your work (Le draw fragments)| 20 + 2 - H- X + N degrees of unsaturation C4H7CIO 2 The 13C NMR contains a signal at 205 ppm. | = 3 singlet | = 2 triplet |= 2 triplet 3 8 (ppm) final answer

Fully annotate ms. Using specific pieces of data from the spectra please discuss how you determined the identity of the terpene unknown. Your answer should be 1-2 paragraphs.

orgo chem II nmr  please help me fill out this chart!

ADUDULCE The following MS spectrum is for a compound which contains one oxygen atom (as well as C and H, of course, but no other atoms). Propose a structure which is consistent with this MS; also identify the species responsible for each peak whose numerical m/z is given (remember resonance!). d a n с e dp 100 80 60 40 20 0 0 20 31 40 60 m/z 77 80 91 % (M+1) /M = 7.93 100 107 108 120

Determine the structure from the FTIR and mass spectrum. The proton NMR has a singlet with an integration of 6 hydrogens at 2.6 ppm, a triplet with an integration of 1 hydrogen at 7.41 ppm, and a doublet with an integration of 3 hydrogens at 7.25 ppm.

The following MS spectrum is for a compound which contains one oxygen atom (as well as C and H, of course, but no other atoms). Propose a structure which is consistent with this MS; also identify the species responsible for each peak whose numerical m/z is given (remember resonance!). OP ALTAOSACO b d 100 80 60 40 20 0 0 20 31 40 60 m/z 77 80 91 % (M+1)/M = 7.93 100 107 108 120

Can I please have help with this?

can you please analyze this spectra (FTIR) for 2-phenylpropan-2-ol thank you.

Examine the IR spectrum in Photo 1. Record the wavenumber for each relevant peak in Data Table 1. Record the bond represented by each relevant peak. Identify the functional groups associated with each bond and record it. Circle the structure(s) on Photo 2 that match the data.

Draw the correct structure based on these 3 spectra. Show each step and througly explain, how you are assembling the structure.

10-What type of functional group in the following Ir spectra? Assign the signal for every functional group Absorbance / % 100- 4000 www 3000 2500 2000 1500 1000

Complete the table below, and provide a structure of a compound that is consistent with the molecular formula C7H12O2 and the following 13C DEPT data. Please show your work. Also, place emphasis on the meaning of the "no peak no peak" data

Please help answering all parts of the following question...thank you! From the following sets of data, please propose a reasonable structure for the unknown organic compound. This molecule is entirely composed of C, H, and N only. Please show all of your work and feel free to write on the spectra any clues as to the structure.

Briefly explain in 1-2 sentences if the following reaction was successful or not from the provided IR spectrum. Give specific values and associated functional groups to support your claim, use values within the 3600-1500 cm¹¹ range. 100 %T 80 60 40 20 2000 3000 1. NaBH4/EtOH 2. H3O+ 2000 1500 Wavenumber[cm-11 OH mm 1000 500 400

a. Calculate the molecular formula of the unknown using mass spectrum and peak data provided to you. b. Draw various possible structural formulas (isomers) using the information from the step above and the IR spectrum

(b) One possible alkene product is shown in the reaction above. Draw the other alkene product that could form from a modified Wittig, the Horner-Emmons reaction (p387). (c) What was your aldehyde starting material? (What is "R"?) 1

The mass spectra of 1-methoxybutane, 2-methoxybutane, and 2-methoxy-2-methylpropane are shown below. Match each compound with its spectrum.

4. Draw a possible molecule for each formula. based on Formula 1 5. Which structure do you think is correct? based on Formula 2 based on Formula 3

The way a molecule fragments in a mass spectrometer depends upon OA. all of the them B. the stability of the fragments C. the structure of the molecule O D. OE. the energy of the electron beam hitting the molecule the bond strengths

Nitesh

How could spectroscopy be used to support that the below reaction occurred? Choose all that apply. H₂C CH excess HCI H₂C. CI CI CH3 Choose one or more: OUV-vis will not be useful because no change in Amax would occur. O Use UV-vis; the product would not show an absorbance in the spectrum range due to a shorter Amax from that of the starting material O Use UV-vis; the product would show an absorbance at a longer Amax from that of the starting material. O IR will not be useful as no detectable change in the spectrum will occur. O Use IR; the product has a sharp narrow peak at 3300 cm-¹, but the starting material does not. O Use IR; the starting material has a sharp narrow peak at 3300 cm-1, but the product does not. O Use IR; the product has a strong broad peak at 2200 cm-¹, but the starting material does not.

Chemistry

Identify the following in the given IR Mass spectrum. Compound 1 Mass Spectroscopy: Interpretation of peaks: Compound 1 Mass Spectroscopy: MASS SPECTRUM 100 80 60 40 20 0.0- 10 20 30 40 50 60 70 m/z Interpretation of peaks: Rel. Intensity

ORGO II NMR  please help fill out the chart and label. my unknown is C6H10O.

4 A please

Consider the following Proton and Carbon NMR spectra for the same compound, and it contains Chlorine. Decide on a structure which is consistent with the spectral data, and 'assign" both spectra as best as you can. "Assign" = draw structure, label (a,b,c etc) and indicate which peaks belong to which type.

How many peaks would each compound show in their 13C NMR spectrum?  a) eucalyptol  b) linalool

Consider the proton NMR spectrum of styrene and splitting trees for the H* and H protons. SOH2 SOHZ ++++++ OHz SOH2 ++++ H H° C=C 6.78 6.66 5.18 5.66 $28 s.18 10 9 6. 1 8 (ppm) FIGURE 13-31 Proton NMR spectrum of styrene. 85.65 8 6.6 shift of H chemical shift of H = 17 Hz Jah = 17 Hz Je = 1.4 Hz Jo = 11 Hz c=11 Hz Part A Draw a splitting tree, similar to those for H" and H", for proton H in styrene. Drag the appropriate labels to their respective targets. Reset Help 2.3 5.16 85.58 Jac = 21 Joc = OI 1.4 11 Hz