Characteristic Infrared Absorption Band1

7/24/2019 Characteristic Infrared Absorption Band1

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CHARACTERISTIC INFRARED ABSORPTION BANDS

R= alkyl group Ar = aryl group Ph = phenyl group ~ =approximately

(s)= strong (m)= medium (w) = weak (b) = broad

NO

Group Range (cm. -1) Range ()

1. O!

A. "tret#hing $re%uen#ies

O! ($ree) &'&&* *.+,*.,-

O! (asso#iated) &*&1 (b) *.,-&.**

(b)

. /e$ormation $re%uen#ies 1,1& 0.*+0.'1

*. !


! *($ree) &&-* *.,**.0* &-&&* *.0&.1

! (asso#iated) &&1 (b) *.,+&.*&

(b)

=! &-&& *.0-&.&

. /e$ormation $re%uen#ies

! * 1+-1 +.,+.-

! 1,11 +.&&+.+*

&. 2!


=2! (a#etyleni#) &&1&* &.*&.1*

=2! *(ole$ini#) &, 31 &.* 3.1

4

=2! (ole$ini#) &* 31 &.&1 3.1

Ar! &0& &.*-&.&&

2! &2 *0+51 &.&+&.&0

*,' 3 &.-,&.-0

2! * *0*+ 3 &.-1&.-&

*, 3 &.&.*

4

2! *,0 &.-+

4. /e$ormation $re%uen#ies

2! * 1-'1-* +.','.*

2!=2! *(see also 2=2) ... 1-*1&0 '.-'.1'

2! &21 1&' 31 '.*' 3.

2! &o$ isopropyl 1&, (w)6 '.* (w)6

1&' (w) '.& (w)

2! &o$ tbuty1 (see also 22) 1&, (w)6 '.* (w)6
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1&' (s) '.& (s)

-. "! ~*, (w) ~&.,, (w)

"i! ~**- ~-.-+

. /euterium

All / stret#hing $re%uen#ies (O/6 /6 2/6 "

/6 et#.) d .'1 x #orresponding ! stret#hing$re%uen#ies (in #m. 1).

+. 2=2 ***1 -.---.+

!2=2R *1-*1 -.+'-.'+

R 12=2R * **+*10 -.-*-.'

'. 2=2


=2=(16*dienoid **10+ (s) -..1 (s)

2=2 (un#on7ugated) 1+1+ +.++.*

2=2 (#on7ugated) 1+11, +.*1+.&&

. Also

2! *=2!R (R=a l k y l or aryl.)*6& 00 36 1.1 3.

01 3 11. 3.+

2! *=2!8 (8 = $un#tional group other than

ester6 amide6 or nitrile)

006 0*+ 1.16 1.,

2! *=2!9(9=ester group) 006 ,1* 1.16 1*.&*

2! *=2! 1R * ,0 3 11.*- 3.+

2! *=2: (;erminal double bond on ring) ,' 11 -&

R 12!=2!R *(trans) 1&*1*' (m) '.'.,

(m)

0,0+ (s) 1*1.&

(s) R12!=2!R*(#is) 1-11& (m) '.1'.-

(m)

'1+, 1-.1-.+

R 12!=2R *R & ,-, 11.01*.

2. Phenyl ring 1+*1' +.1+.&6

1*1-, +.,+.'

(1) en


3/6

?aphthalenes ,,& (m)6 11.'1*.

(m)6

,&, (s)6 1*.1*.

(s)6

'+'* 1&.*1&.0

,. 22(2! *) (x @-) ("inglet in li%uid6 doublet in

solid para$$ins. A#tually due to 2! *

de$ormation)

'-'* 1&.1&.0

(2! &) *2! 11' 3& ,. 3.*

11- 3 ,.'& 3.-

(2! &.) &2 1* 3* ,. 3.*

1*, 3+ ,.*, 3.-

22!(2! &)2!(2! &)2 11-111 ,''0.1

0. 2= *-*1 -.1'-.'+

R2= **+**- (s) -.-&-.-' (s)

Ar2=6 R2= (#on7.) **-**1 (s) -.-'-.* (s)

"2= ~*1+ ~-.+&

R=2 (iso#yanide) ***1 -.-.'+

1. 2=

=2=" ~*1 ~-.'+

=2= ~*1 ~-.'+

=2: 1++1+1 +.*+.*1

11. 2

22(2 saturated) 1111 ,.'0.0

22(2 unsaturated or aromati#) 1&&1* '.*,.

2! & 1&'1&1 '.&'.+&1*. 2=O

A. "tret#hing $re%uen#ies-

Anhydrides2OO2O 1,+1, .&,.+6

1,1' .+.'1

A#id #hlorides (un#on7ugated) 1,1', .-1.+*

A


4/6

1'.*

(&) Propionates 1*'6 1*110 (s)6 '.,-6 ,.&&

,.- (s)

1,6 1*6 ,1 0.*+6 0.,6

1*.&

(-) nutyrates 1*6 1106 11 '.0'6 ,.-60.0

() Gsobutyrates 1*+6 1*6 '.0-6 ,.&&6

11+ ,.+*6

1, 0.*+

(+) GsoHalerates 110 ,.&'

(') Phthalates 1*,1*+6 '.','.06

11&111 ,.,0.16

1'1+ 0.&0.&0

Aldehydes 1'&1+' .',.0'

Ietones

(1) Dn#on7ugated 1'*1' .,1.,+

(*) >6 ?2on7ugated (in# luding aryl ketones) 1'1++ .,,+.

(&) >6 ?6 >J ?J2on7ugated (in#luding diaryl

ketones)

1+'1+ .00+.+

(-) All methyl ketones but a#etone (not

stret#hing $re%uen#ies)

1-+6 1-*6 +.,6 '.-

1&'6 11'6 '.&6 ,.6

0 1+.,

2arboxyli# a#ids6 2OO! (see also O!) 1'-1+ '+.+

. itrogen#ontaining #arbonyl #ompounds

Amino a#id ions6 ! &5R2OO! 1'1' .'1.,, ?a#tam (strained ring #arbonyl) 1,*1' .-,.'*

Dreido 1'*1+' .,1.00

Amides

(1) R2O! *(see also !) 1+01+ .0*+.+

1+&1+* +.1&+.1'

(*) R2O!R (see also !) 1+,1+-6 .0+.16

1'1& +.&'+.-

(&) R2OR & 1+ +.+

2. is#ellaneous #arbonyl#ontaining groups 2=O stret#hing

$re%uen#y plus the

$ollowing

en


5/6

1-+1- +.,*'.1-

2O &= 1-'1- +.,'.1-6

,,,16 11.-1*.&6

'&+' 1&.'1-.,

!2O & 1+,1+16 .0+.*16

1-+1- +.,*'.1- 1*0'6 0.'1.&6

,,,16 11.-1*.&6

'&+' 1&.'1-.,

1-. 2O

O2! & 1&-1*, '.-+',1

9thers6 unsaturated =2O2 (in#luding aryl

eters)

1*+1* '.0-,.&&

9thers6 saturated 111' ,.'0.&

,- 1'.*1,.

;rigly#erides ~1*- (m) ~,.+ (m)6

11' (s) ,. (s)6 111 (w) 0.1 (w)

1. 2F

2F *and 2F & 1&1*6 '.-1,.&&6

1*1, ,.&&0.*+

=2F 1*&11 ,.1&0.0

2F 11*11 ,.0&0.0

1+. 22l '&+& 1&.'1.0

22l(oHertoneK) 111-, (w) +.+*+.'+

(w)

22l * ,-'06~+* 11.,1*.+6 ~1+.1

1'. 2r *-' 10.*1.1

1,. "ili#on#ontaining groups

"i! ~**- ~-.-+

"i2! & 1-16 1*+ (s) '.06 '.0-

(s)

"i2 *! 1-+6 1-16 +.,6 '.0

1&'6 1*-6 '.*'6 ,.+6

116 0+ 0.06 1.-

"iPh 106 1-06 +.*06 +.'16

1-&6 1106 +.006 ,.-6 11*6 1&6 ,.0&6 0.'16

00 1.

O"i 111 0.11.

"i (2! &) & ,-6 ' 11.06 1&.*

2i (2! &) * , (s)6 ' 1*. (s)6

1-.&

10. "ul$ur#ontaining groups


6/6

"! ~*, (w)6 ~&.,0 (w)6

10 1.11.1

L2=" 11-1 +.-'.0

2" '+ 1-.&1+.'

"" ~ (K) ~*. (K)

"ul$oxide "MO 1+1& (s) 0.-&0.'1 (s) "ul$ones "O * 1&1&6 '.-1'.+0

11+11* ,.+*,.0&

"ul$onates R"O *OR 1*11 ,.&&,.'

"O -= 1&1- +.-+.0

"=P +1' 1+.-1'.

* is#ellaneous groups

O *(nitro) **-6 -.-.1'

101-6 +.*0+.-06

1&,1&* '.*'.,

O ~1 ~1.

O &(nitrate) 1-* 1&'6 '.-'.&6 ,-,16 11.,1*.&6

'-'1 1&.1-.

P=O 1&,1&* '.*'.,

Phosphites ,' 11.

Phosphonates 0- 1.+

*1. 2ompounds o$ interest u7ol *01,6 *,+16 &.-*'6

&.-06

1-,6 1&',6 +.,06

'.*'6

'* (w) 1&.,0 (w) i%uid water (Hery thin) ~&-&6 ~*.0*

1+1+ +.++.*

Atmospheri# water Hapour ~10--1&* ~.1-'.,

(mu#h $ine stru#ture)

Atmospheri# 2O * *&+'. *&&+6 -.**6

-.*,16

'*1 (w)6 1&.,' (w)6

++' (s) 1-.00 (s)

"umber E httpsENNwww.unod#.orgNunod#NenNdataandanalysisNbulletinNbulletin10111page.html
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Characteristic Infrared Absorption Band1