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11 Nov 2019
16. What does mass spectrometry measure? a. vibrations of bonds b. The molecular weight of a compound d. stereochemistry of c. electronic transitions functional groups molecular ion peak usually indicates th 17. An presence of an odd number of nitrogen atoms in the molecule a. absent e b. even c. intense d. odd 18. The mass spectrum of alcohols often fails to exhibit detectable M peaks, but instead show relatively large a. M- 16 19. Which functional group will be recorded at the lowest (smallest peaks d. M+2 wavenumber) IR frequency? a. ketone carbonyl b. ether (C-O bond) c. alkyne (C-H bond) d. alkene (C-H bond) 20. Internal alkynes often have weak or absent IR stretching frequencies for the following reason a. The alkyne triple bond does NOT vibrate floppy c. Alkynes have small dipole moments b. The alkyne triple bond is very d. All of the above 21. What does infrared (IR) spectroscopy measure? a. vibrations of bonds b. The molecular weight c. electronic transitions d. stereochemistry of
16. What does mass spectrometry measure? a. vibrations of bonds b. The molecular weight of a compound d. stereochemistry of c. electronic transitions functional groups molecular ion peak usually indicates th 17. An presence of an odd number of nitrogen atoms in the molecule a. absent e b. even c. intense d. odd 18. The mass spectrum of alcohols often fails to exhibit detectable M peaks, but instead show relatively large a. M- 16 19. Which functional group will be recorded at the lowest (smallest peaks d. M+2 wavenumber) IR frequency? a. ketone carbonyl b. ether (C-O bond) c. alkyne (C-H bond) d. alkene (C-H bond) 20. Internal alkynes often have weak or absent IR stretching frequencies for the following reason a. The alkyne triple bond does NOT vibrate floppy c. Alkynes have small dipole moments b. The alkyne triple bond is very d. All of the above 21. What does infrared (IR) spectroscopy measure? a. vibrations of bonds b. The molecular weight c. electronic transitions d. stereochemistry of
Nestor RutherfordLv2
19 Jun 2019