18.
Agar IQ -spektrda 1280 sm
- 1
soha kuzatilsa va 600—800 sm
- 1
yutilish sohasi kuzatilm asa bu birikm aning
tuzilishi quyidagi qaysi
form ulaga to ‘g‘ri keladi?
C2H50.
C2H5C>
X
y o k i
2 5 > F <
C 2H5CT
OR
C 2H50
SR
19.
Agar IQ -spektrida 3260, 2970, 2930, 2870, 2850, 1720, 1707,
900 s n T
1
so halar kuzatisa, levunin kislota qanday —
o ch iq yoki
lakton shaklida m avjud b o ‘ladi?
CH3X ^C H x
CH 3COCH2CH 2COOH
С
CH
2
° —
4
20. Agar IQ -sp ek trid a bosh q a so halar bilan birgalikda 3250—
2600 sm
- 1
oraliqda keng soha ham d a 1720 va 900 sm
- 1
dagi sohalar
kuzatilsa C H
3
C O O C
2
H
5
yoki C
2
H 5C O O H
m oddaning
form ulasi
qanday b o ‘ladi?
21. Agar IQ -spektrida 2970, 2930, 2870, 2850, 1653, 1613 smH li
chastotalar va 1383 va 1370 s i r r
1
li dublet soha topilgan b o ‘lsa,
(C H
3
)
2
C H C H
2
C H
2
N 0
2
yoki (C H
3
)
2
C H C H
2
C H
2
0 - N = 0
birikm a
form ulasi qanday b o ‘ladi?
22. M odda eritmasining IQ-spektrida 3450, 3370, 1630sm_1 sohalar
topildi. Spektr qaysi birikma: C H
3
C O N (C H 3)2, C H
3
C O N H C H
3
yoki
C H
3
C O N H
2
ga to ‘g ‘ri keladi?
23. o-nitrotoluol IQ -spektrida 2960, 2870, 1520, 1465, 1380,
1330, 850 va 750 sm
- 1
y u tilis h so h a la ri k u z a tila d i.
R e a k siy a
o ‘tkazilgandan so ‘ng spektrda 1520, 1330, 850, 750 s i r r
1
yutilish
sohalari yo ‘qolib, 3420,3340, 1644 sm
”
1
yangi yutilish sohalari va 680
sm
”
1
da keng soha hosil b o ‘ldi. Q anday reaksiya olib borilgan?
o -n itro to lu o ln in g boshq a reaksiyasi natijasida
olingan m o d d a
spektrida 2960, 2870, 1465, 1380 sm
”
1
yutilish sohalari yo ‘qolib,
2700—2600 sm
”
1
da keng soha va 1680 sm
” 1
da yorqin soha hosil
b o ‘ldi. Bu safar qanday reaksiya olib borilgan?
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