Spectroscopy

Question 1

Infrared Spectroscopy

Answer 1

measures molecular vibrations of characteristic functional

Question 2

UV Spectroscopy

Answer 2

involves passing ultraviolet light through a chemical sample and plotting absorbance vs. wavelength

Question 3

UV Spectroscopy most useful for:

Answer 3

studying compounds containing double bonds and heteroatoms with lone pairs

Question 4

NMR Spectrum:

Position of Peaks Indicates

Answer 4

the further left the peak (downfield) the more deshielded the proton, which usually corresponds to more electron-withdrawing groups

Question 5

NMR Spectrum:

Integration of Peaks

Answer 5

the larger the integration, the more protons contained under the peak

Question 6

NMR Spectrum:

Splitting

Answer 6

hydrogens on adjacent carbons will split a peak into n +1 subpeaks, where n is the number of hydrogens on the adjacent carbon