N
X
C
Hal
O
N
S
P Si
Natural
Products
Solvents
C
C
C
C C
C
327
7.8 Alcohols, Ethers, and Related Compounds
327
Typical Ranges (v ~ in cm -1 )
Assignment
Range
Comments
C–O–C st as
1310–1000
Strong, sometimes split
Subranges for noncyclic ethers:
1150–1085
CH 2 –O–CH 2
1170–1115
CH–O–CH, often split
1225–1180
C=C–O–al C
1275–1200
ar C–O–al C
Subranges for cyclic ethers:
1280 sy
870 as
O
≈1030 sy
≈980 as
O
≈1070 sy
≈915 as
O
≈1235
O
≈1100 as
≈815 sy
O
≈950
O
O ketals, acetals: 4 to 5 bands
≈925
O
O
1024, 1086 as
≈880 sy
O
O
≈800
O
O
in acetals: C–H st, ≈2820, weak
C–O–C st sy
1055–870
Strong, sometimes multiple bands
Subranges for noncyclic ethers:
1125–1080
C=C–O–al C, medium
1075–1020
ar C–O–al C, medium
In the same range: strong bands for C–O st, C–F st, C–N
st, N–O st, P–O st, C=S st, S=O st, P=O st,
Si–O st, Si–H δ