IR, HNMR, Mass Spec, CNMR

Question 1

Br mass spec

Answer 1

m and m+2 peak same height

Question 2

Cl mass spec

Answer 2

m and m+2 1/3 of eachother

Question 3

C-C IR

Answer 3

1200

Question 4

C=C IR

Answer 4

1660

Question 5

c triple bond c IR

Answer 5

<2200

Question 6

isolated C=C IR

Answer 6

1640-1680

Question 7

conjugated c=c IR

Answer 7

1620-1640

Question 8

aromatic IR

Answer 8

1600

Question 9

sp3 c-h ir

Answer 9

2800-3000

Question 10

c=c-h ir

Answer 10

3000-3100

Question 11

c triple bond c-h

Answer 11

3300 sharp

Question 12

oh ir

Answer 12

broad, rounded tip, 3300

Question 13

r2nh ir

Answer 13

3300 broad with one sharp spike

Question 14

rnh2 ir

Answer 14

broad with two sharp spikes

Question 15

ketone c=o ir

Answer 15

1710

Question 16

aldehyde c=o ir

Answer 16

1725, aldehyde 2700 2800 stretch

Question 17

carboxylic acid ir

Answer 17

c=o is 1710 with broad oh

Question 18

conjugated carbonyls ir

Answer 18

absorb at lower frequencies (1680)

Question 19

carbonyl amides ir

Answer 19

particularly low- 1640 to 1680

Question 20

carboxylic ester ir

Answer 20

1735

Question 21

strained cyclic ketones ir

Answer 21

highest frequency out of all; 1785

Question 22

c-n, c=n, cn ir

Answer 22

1200, 1660, >2200

Question 23

ir sulfure

Answer 23

m+2 peak larger than usual (4.2%)

Question 24

alkane hnmr

Answer 24

0.9

Question 25

alkane ch2 hnmr

Answer 25

1.3

Question 26

alkane ch hnmr

Answer 26

1.4

Question 27

methyl ketone hnmr

Answer 27

2.1

Question 28

acetylinic hnmr

Answer 28

2.5

Question 29

r-ch2-x hnmr

Answer 29

3-4

Question 30

c=c-h hnmr

Answer 30

5-6

Question 31

allylic h hnmr

Answer 31

1.7

Question 32

ph-h hnmr

Answer 32

7.2

Question 33

ph-ch3 hnmr

Answer 33

2.3

Question 34

aldehyde h hnmr

Answer 34

9-10

Question 35

carboxylic acid hnmr

Answer 35

10-12

Question 36

r-oh hnmr

Answer 36

10-12

Question 37

ar-oh hnmr

Answer 37

4-7

Question 38

r-nh2 hnmr

Answer 38

1.5-4

Question 39

n-h hnmr

Answer 39

3.5

Question 40

o-h hnmr

Answer 40

4.5

Question 41

coupling constants

Answer 41

-trans>cis>free rotation>geminal
ortho>allylic>meta

overall

trans,cis, ortho, free rotation, allylic, geminal=meta

Question 42

oh or nh on hnmr

Answer 42

will not show splitting if impure

Question 43

c=o cnmr

Answer 43

150-200

Question 44

c=c or aromatic c cnmr

Answer 44

100-150

Question 45

cnmr c-o or c triple bond c

Answer 45

50-100

Question 46

alkane cnmr

Answer 46

0-25

Question 47

c-cl or c-br cnmr

Answer 47

25-60