Within the cm−1 region, how can primary, secondary, and tertiary amines be distinguished?
Shown here is the structure of (+)-carvone.
Using R/S and E/Z labels, assign the stereochemistry of the chiral center and stereoisomeric alkene group.
Which of the following infrared signals is most likely to correspond to stretching of the carbonyl bond?
In order for a compound to be IR active, it must undergo which of the following?
Which of the following is in correct order of decreasing IR stretching frequency?
An organic compound that is liquid at room temperature exhibits a strong IR absorption at cm−1. It is unreactive to acidified potassium dichromate, but the product of its reaction with lithium aluminum hydride exhibits a strong IR absorption in the cm−1 range. To which of the following chemical families does the liquid most likely belong?
A pure, colorless liquid with a high boiling point exhibited a strong IR absorption in the cm−1 range. The only other strong IR signals outside of the fingerprint region can be assigned to resonances. To which of the following chemical families does the liquid most likely belong?
Which of the following regions would be most useful in determining the substitution patterns of an alkene?
Keeping all other variables the same, as bond strength decreases, which of the following is true?
Ethers, esters, and alcohols all contain stretching bands. How can an ether be distinguished from the other two compounds?
What of the following does not affect the stretching frequency in a metal-ligand complex?
Which of the following statements about IR spectroscopy is false?
A common organic chemical exhibits a strong IR absorption at cm−1. Which of the following functional groups could have caused this absorption?
In order for an IR vibration to be allowed, what condition must be met?
Hydrogen bonding causes the hydroxyl IR stretching band to do what?
Keeping all other variables the same, which of the following bonds would have the lowest IR stretching frequency?