Ir Flashcards
Two peaks between 3300 and 3400
Primary amine
What does the wave number depend on?
Bond strength and mass
What do smaller atoms do to wave numbers?
Make them higher
What does increasing the strength of a bond via pi bonds do?
Increases wavenumber
Ketone peak?
1720
Saturated Ester peak
1740
Unsaturated, conjugated ester
1710
Aldehyde
1730
What does increasing polarity do?
Intensify signal
Does h bonding narrow or broaden the OH peak?
Broaden
How many peaks do primary amines have?
2
How many peaks do secondary amines have?
1
Describe the peaks with an amide.
Carbonyl at 1820-1660
3400 medium signal
Describe the peaks with a carboxylic acid.
Carbonyl at 1820-1660
OH at 3400-2400 (broad signal)
Describe the peaks with an ester present.
Carbonyl at 1820-1660
C-O present at 1300-1000
Describe the peaks an anhydride
Two carbonyls - 1810 - 1760
Describe the peaks of an aldehyde
Carbonyl at 1820 - 1660
2 C-H peaks at 2850 and 2750
Describe the peaks of a ketone.
Just a carbonyl at 1820 - 1660
Describe the peaks of an alcohol.
Broad peak 3400-3300
Describe the peaks of an amine
Medium peaks near 3400
Describe the peaks of an ether
No OH peak
Peak near 1300 -1000
Describe the peaks of an alkene
Weak peak near 1650
Describe the peaks of an alkyne with C-N? With C-C?
Medium/sharp peak at 2250 for C-N or 2150 for C-C
Describe the peaks of a hydrocarbon, simple alkane.
Just peaks near 3000
How many degrees of unsaturation does a double bond add?
1
How many degrees of unsaturation does a triple bond add?
2
How many degrees of unsaturation does a ring add?
1
What is the formula to calculate degrees of unsaturation?
(2C + 2 +N - H - X)/2
Conjugated ketone?
1680
