Structural Analysis Flashcards
1
Q
1H NMR
A
Ppm, integration, multiplicity and inferences
2
Q
Upfield 1H NMR
A
0 - 5.5 ppm
3
Q
Downfield 1H NMR
A
> 5.5 ppm
4
Q
Multiplicity
A
N nearby H = n+1 lines
5
Q
How to calculate double bond index
A
2C + 2
- no of H and X
+ no of N
Divide by 2
6
Q
IR
A
Wavenumber and inferences
7
Q
C DEPT
A
Nothing
8
Q
CH DEPT
A
2 up
9
Q
CH2 DEPT
A
one down
10
Q
CH3 DEPT
A
one up
11
Q
13C NMR
A
Chemical shift/ppm, DEPT and inferences
12
Q
Typical fragmentation of mass spectra
A
To more stable C+, at branch site, at branch site to more stable C+ and cleavage of weakest bond
