N
X
C
Hal
O
N
S
P Si
Natural
Products
Solvents
C
C
C
C C
C
215
5.8 Alcohols, Ethers, and Related Compounds
215
1 H Chemical Shifts and Coupling Constants of Aromatic Ethers (δ in
ppm, J in Hz)
1 H Chemical Shifts and Coupling Constants of Acetals, Ket als, and
Ortho Esters (δ in ppm, J in Hz)
O
O
O
O
7.29
6.94
b
a
c
d
e
f
6.90
3.75
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
5.09
3.20
5.00
5.90
O
O
O
3.33
4.96
6.81
3.31
0.91
3.29
3.58
1.22
3.61
1.23
5.16
3.32
4.57
4.29
1.28
1.62
6.81
4.90
4.70
3.80
1.68
3.88
4.44
4.67
3.60
1.22
7.21*
* assignment uncertain
7.23*
O
3.98
1.38
O
4.51
1.31
O
5 J ab ≈0.8
3 J bc 8.3
4 J bd 1.0
5 J be 0.4
4 J bf 2.7
3 J cd 7.4
4 J ce 1.8
3 J ab 8.3
4 J ac 1.1
5 J ad 0.5
4 J ae 2.6
3 J bc 7.4
4 J bd 1.7
2 J gem 1.5
O
7.32
7.09
a
a
b
b
c
d
e
7.01
2 J a,gem -7.5
3 J ab,cis 7.3
3 J ab,trans 6.0