The following NMR and IR spectra were obtained for a molecule with molecular formula C,H402. Draw the structure of the molecule that is consistent with the two spectra. Note. In the NMR spectrum, s stands for singlet. C,H,O2 3H, s 3000 cm-1 1H, s 1720 cm-1 12 10

Counterfeit drugs are a common problem in developing regions of the world. Oftentimes, counterfeit pills are made with compounds such as lactose. A lab technician has obtained the IR spectrum shown above for a sample reported to be citalopram, an antidepressant drug. Does the IR spectrum belong to citalopram or lactose? Explain your answer by describing what feature of the IR spectrum confirms your choice and describe what feature is missing from the IR spectrum for the other compound. A. citalopram B. lactose

A compound with the molecular formula C5H1002 has the following NMR spectrum. Determine the number of protons giving rise to the signal at 4 ppm. Proton NMR 4.5 O O O O O 1 6 4.0 33.2 3.5 3.0 2.5 Integration Values 2.0 48.4 illu 1.5 33.3 1.0 48.7 0.5 ppm

Each of the following molecules has a unique H NMR spectrum. molecule A molecule B molecule C molecule D molecule E molecule F molecule G molecule H i See Periodic Table O Choose the molecule(s) that will only show two signals, with an integration ratio of 2:3, in their H NMR spectum. Choose one or more: O molecule A O molecule B O molecule C O molecule D O molecule E O molecule F O molecule G O molecule H

Identify the characteristic seen in the mass spectrum when there is a nitrogen in the compound. There are two molecular ions 2 units apart in a 3:1 ratio. The molecular ion has an even molecular mass. There are two molecular ions 2 units apart in a 1:1 ratio. The molecular ion has an odd molecular mass.

For the dimedone molecule, how many different signals would you see in the proton NMR? Assume you can see them all

4000 For the following compound identify what peaks would be found in an IR spectrum. Draw the expected IR spectrum on the graph below. Label each peak with the location and portion of the molecule it represents. 3500 3000 IR spectrum 2500 2000 1500 1000 500 0

A 13C NMR spectrum is shown for a molecule with the molecular formula of CsH11Cl. Draw the structure that best fits this data. 60 50 40 30 PPM 20 10 Q

Draw the organic structure of the compound and mark its peaks on the spectra

A DEPT NMR spectrum is shown for a molecule with the molecular formula of CsH12O. Draw the structure that best fits this data. 200 180 T 160 T 140 T 120 100 80 60 40 20 ppm 0 P