I URGENTLY need help with these problems. I must be able to identify for each graph or problem the molecular formula for the compound and the structure for each compound. I must label the major peaks on the IR spectrum and also label the peaks contained in the HNMR spectrum. I must Identify all peaks on the CNMR spectrum. Lastly, I must explain the splitting pattern observed with a discussion of splitting constants for non-equivalent protons on the spectrum. I know from the spectrum that I do have splitting but I'm lost. Can you PLEASE HELP me with these problems?
Each analysis should contain:
1. The molecular formula for the compound.
2. The structure for the compound.
3. Labels for the major peaks written directly on the IR spectrum.
4. Identification of the peaks contained in the 1HNMR spectrum.
5. An explanation of the splitting pattern observed with a discussion of splitting constants for non-equivalent protons.
6. Identification of all peaks on the 13CNMR spectrum.
This solution provides answers to questions regarding molecular formulas.
NMR and IR Spectrosocopy
1) Give the Frequency ranges (in cm-1) for each of the following:
a. O-H stretch
c. -C-H stretch
d. =C-H stretch
2) Briefly describe how could you distinguish between cyclohexane and cyclohexene by IR?
3) Define the following terms:
a. Coupling constant
b. Chemical shift
c. Spin-spin coupling.
4) A solid samples are prepared by examination by IR spectroscopy by fusing them in a KBr pellet or dissolving them in CCl4 and subtracting a background of pure CCl4 from the spectrum. Assuming equal solubility of the compound in both solvents why would acetone be a poor substitute for CCl4 in the latter method.
5) Predict the splitting pattern for each kind of proton in the 1H NMR spectra of the following:
6) Predict the number of signals that would appear in the 13C NMR spectra of the molecules from the previous questions.
7) Propose a structure for a molecule with a molecular formula C10H13NO and the following 1H NMR data. Explain your answer.