IR PEAKS Flashcards
What does it mean when IHD is 1,2, or 4?
1: double bond or ring
2: alkyne (triple bond)
4: benzene
What are the common ppm or chemical shifts for Alkynes?
3
What is the wave number for an O-H bond?
O-H: 3300-3600
What is the wave number for a CH sp3 carbon bond?
CH-sp3: 2900
What is the wavenumber for C double bond to O?
1700 cm(-1)
What is the wavenumber for the CH sp2 carbon bond?
CH-sp2: Around 3100
What is the wavenumber for C triple bond to C?
2100-2200
What is the wavenumber for C double bond to C?
1600-1700
What is the wavenumber for the N-H bond?
3200 or 3400
What is the wavenumber for the C triple bond to N bond?
2100-2200
What values make the proton NMR signals when cis, trans or germinal?
Cis: 6-12 Hz
Trans: 12-18 Hz
germinal: 0-3 Hz
What is the chemical shift/ppm for carboxylic acid?
12
What is the chemical shift/ppm of Aldehyde?
10-11
What is the chemical shift/ppm for Aromatic?
7-9
What is the chemical shift/ppm for Alkene?
5-7