N
X
C
Hal
O
N
S
P Si
Natural
Products
Solvents
C
C
C
C C
C
315
7.4 Alicyclics
315
7.4 Alicyclics
Cyclic Alkanes
Cyclic Alkenes
The other vibrations are similar to those in noncyclic alkenes and cyclic alkanes.
Typical Ranges (v ~ in cm -1 )
Assignment
Range
Comments
C–H st
3090–2860
Strong
H–C–H δ
1470–1430
Weak
C=C st
1780–1610
Varies with ring size and substitution
Twisting and wagging CH 2 as well as C–C st do not significantly differ from the corresponding vibrations in noncyclic compounds and are of limited diagnostic value.
%T
400
800
1200
1600
2000
2800
3600
CH st
CH 2 δ
%T
400
800
1200
1600
2000
2800
3600
C=C st
X
C
Hal
O
N
S
P Si
Natural
Products
Solvents
C
C
C
C C
C
315
7.4 Alicyclics
315
7.4 Alicyclics
Cyclic Alkanes
Cyclic Alkenes
The other vibrations are similar to those in noncyclic alkenes and cyclic alkanes.
Typical Ranges (v ~ in cm -1 )
Assignment
Range
Comments
C–H st
3090–2860
Strong
H–C–H δ
1470–1430
Weak
C=C st
1780–1610
Varies with ring size and substitution
Twisting and wagging CH 2 as well as C–C st do not significantly differ from the corresponding vibrations in noncyclic compounds and are of limited diagnostic value.
%T
400
800
1200
1600
2000
2800
3600
CH st
CH 2 δ
%T
400
800
1200
1600
2000
2800
3600
C=C st