instrumentalna analiza-1-1
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INFRACRVENA
SPEKTROSKOPIJA
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Poloaj apsorcijskih maksimuma odreen je jakou veza i masomvezanih atoma
Jaa veza i manja masa vezanih atoma uzrokuju viu frekvenciju
apsorpcije, odnosno signal ima vii pomak
C C, C O, C N 1300 800 cm-1
C C, C O, C N, N O 1900 1500 cm-1
C C, C N 2300 2000 cm-1
C H, O H, N H 3800 2700 cm-1
podruje otiska prsta
podruje funkcijskihskupina
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( ( ( (C=O) j 1765 - 1645 cm-1
( ( ( (CH) sr 2850 - 2720 cm-1
CH3CH2CO
H
as (CH) sr
s (CH) sr
1480 - 1430 cm-1
-CH3-CH2
( ( ( (CH) sr 3000 - 2850 cm-1
1395 - 1350 cm-1
-CH2 -CH3
CH
C=O
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C=O
(CCOC) sr 1300 - 1100 cm-1
-CH3
C CC
OC CH3
O
CH3
-CH3
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CH3CH2CO
OH
CH3CH2CO
OH
COOHC=O
-CH3
-CH2OH
(COOH) 3550 2500 cm-1
COH
-CH3-CH2
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( ) sr 2260 - 2100 cm-1C C
C H
C C
-CH3
-CH2
CH3(CH2)3C CH
( ) j 3340 - 3250 cm-1C H
-CH3
-CH2
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C=O
-CH3
-CH2
CO O COCH3CH2 C O C CH2CH3
O O
( ) j 1047 cm-1CO O CO
-CH3
-CH2
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-CH3
-CH2
(C=Califatski) sl 1690 - 1635 cm-1
( ) j 710 cm-1
C H
C H
C H
C CC(CH3)3H3C
H H
CC
-CH3
Z (cis) izomer!
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C H-CH3
C H
CC
(C=Califatski) sl 1690 - 1635 cm-1
( ) j 970 cm-1C H
C C
C(CH3)3
H3C
H
H
-CH3
E (trans) izomer!
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C H
( aromatski) j 3100 - 3000 cm-1C H
CC
(C=Caromatski) sr 1600 - 1450 cm-1
C H CC
( ) j 750 cm-1C H
( ) j 700 cm-1CC monosupstitucija!
CH3
dva signala
-CH3
-CH3
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C H
CC-CH3
C H
CH3
CH3
( aromatski) j 3100 3000 cm-1
C H (C=Caromatski) sr 1600 - 1450 cm
-1
( ) j 770 - 735 cm-1C H
o-disupstitucija!
(jedan signal)
-CH3
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CC
-CH3
C H
CH3
CH3C H
( ) j 900 860, 865 810, 810 750, 725 - 680 cm-1C H
m-disupstitucija!
(etiri signala)
-CH3
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CC
-CH3
C H
CH3
CH3
( ) j 860 780 cm-1C H
p-disupstitucija!
(jedan signal)
C H
-CH3
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