Lab II Final

Question 1

weight of fragmented -CH3

Answer 1

15

Question 2

weight of fragmented -CH2- CH2=

Answer 2

14

Question 3

weight of fragmented CH3-CH2

Answer 3

29

Question 4

weight of fragmented phenyl

Answer 4

77

Question 5

weight of fragmented -OH

Answer 5

17

Question 6

weight of fragmented -NH2

Answer 6

16

Question 7

weight of fragmented carboxylic acid

Answer 7

45

Question 8

weight of fragmented -Cl

Answer 8

35

Question 9

weight of fragmented -Br

Answer 9

79

Question 10

weight of fragmented carbonyl

Answer 10

28

Question 11

weight of fragmented 2 carbons (-CH2-CH2-) (CH2=CH2)

Answer 11

28

Question 12

weight of fragmented (CH3-C-)

Answer 12

27

Question 13

weight of fragmented isopropyl or propyl

Answer 13

43

Question 14

weight of fragmented -CH-OH

Answer 14

30

Question 15

weight of fragmented -CH2-NH2

Answer 15

30

Question 16

weight of fragmented I

Answer 16

127

Question 17

salicylic acid occurs naturally in…

Answer 17

the bark of willow trees and spiraea

Question 18

salicylic acid has been used since ________ time in _____ BC

Answer 18

Hippocrates

460

Question 19

German chemical company converted Salicylic acid into

Answer 19

acetylsalicylic acid aka aspirin

Question 20

______ is used to determine the purity of aspirin

Answer 20

FeCl3

Question 21

what is present in aspirin that is not pure?

Answer 21

• salicylic acid

- vinegar odor caused by the byproduct of acetic acid

Question 22

cerric nitrate test determines the presence of LMW alcohols this means…

Answer 22

• OH must have less than 11 C’s

- OH must be sparingly soluble ~3%

Question 23

what indicates a + result in the cerric nitrate test?

Answer 23

-color change from yellow to red

Question 24

in a cerric nitrate test primary OH, secondary OH, and tertiary OH form?

Answer 24

• carboxylic acids
• ketones
• carboxylic acids and ketones

Question 25

lucas test is only applicable to

Answer 25

OH that are soluble in the reagent

Question 26

what are the reagents that are used in the cerric nitrate test?

Answer 26

concentrates

• HCL
• ZnCl2
• RT

Question 27

the lucas test will be + for any

Answer 27

• allylic
• benzylic
• 2 and 3 OH
• have less than 7 carbons

Question 28

what indicates a + result for the lucas test?

Answer 28

-visible second layer (emulsion)

Question 29

reagents for Iodoform test

Answer 29

• I2
• KI
• H2O
• NaOH
• NaOI

Question 30

iodoform test distinguishes _____ from all other 1 aliphatic alcohols

Answer 30

ethanol

Question 31

iodoform test distinguishes _____ from all other 2 alcohols

Answer 31

methyl carbinols

Question 32

a + result from the iodoform test will yield..

Answer 32

a yellow precipitate

Question 33

con. HCl test reacts with

Answer 33

• 3 OH

- all allylic and benzylic OH

Question 34

Chromic anhydride test determines the presence of

Answer 34

1 and 2 OH

Question 35

what will yield a negative result for a chromic anhydride test?

Answer 35

a 3 OH

Question 36

A positive chromic anhydride test will give…

Answer 36

a color change from orange to a blue-green

Question 37

in a chromic anhydride test 1 OH and 2 OH react to form..

Answer 37

• carboxylic acids

- ketones

Question 38

NMR shift for saturated chains is at…

Answer 38

0-1.5 ppm

Question 39

NMR shift for ketones/halides is at…

Answer 39

1.5-4.6 ppm

Question 40

NMR shift for ethers is at…

Answer 40

3.2-5.1 ppm

Question 41

NMR shift for cyclic compounds is at…

Answer 41

2.2-10 ppm

Question 42

NMR shift for aldehydes is at…

Answer 42

9.5-10 ppm

Question 43

NMR shift for carboxylic acids is at…

Answer 43

9-12 ppm

Question 44

NMR shift for sulfonic acids is at…

Answer 44

11-12 ppm

Question 45

NMR shift for phenyl is at…

Answer 45

7 ppm

Question 46

what is coupling?

Answer 46

neighboring, non-equivalents Hs split the NMR signal into peaks