Chapter 13 book

Question 1

What can you tell from Mass spectrometry?

Answer 1

Measure molecular weight and determine molecular formula

Question 2

Fragments

Answer 2

radicals and cations lower molecular weight than ion

Question 3

What is the tallest peak called

Answer 3

base peak

Question 4

What happens to the molecular weight of nitrogen is involved

Answer 4

molecular weight is odd

Question 5

If the molecule ion is 72 what could the molecular formula be

Answer 5

C5H12, C4H8O, C3H4O2

Question 6

If the molecule ion is 100 what could the molecular formula be

Answer 6

C8H4, C7H16, C6H12,O, C5H8O2

Question 7

If a Cl is involved what happens to the molecular ion

Answer 7

3:1 ratio

Question 8

If a Br is involved what happens to the molecular ion

Answer 8

1:1 ratio

Question 9

Aldehyde and Ketone fragment pattern

Answer 9

alpha cleavage: break bond between carbonyl carbon and adjacent

Question 10

Alcohol fragment pattern

Answer 10

alpha cleavage: break bond between alkyl group and C that bears OH or H2O elimination with 2 bond

Question 11

Amine fragment pattern

Answer 11

alpha cleavage: break bond between alkyl group and c that bears amine forming a resonance structure

Question 12

Infrared Spectroscopy

Answer 12

technique used infrared light to interact with compounds which causes bonds to bend and vibrate causing certain functional groups to be at certain absorptions

Question 13

photons

Answer 13

particles of electromagnetic radiation which have quantum

Question 14

quantum

Answer 14

discrete amount of energy

Question 15

wavelength

Answer 15

distance from 1 point on wave to some point

Question 16

frequency

Answer 16

of waves per unit of time

Question 17

electromagnetic spectrum

Answer 17

electromagnetic radiation

Question 18

wavenumber concerning wavelength and frequency

Answer 18

inversely proportional to wavelength and proportional to the frequency

Question 19

What happens if frequencies match with a bond

Answer 19

they will be absorbed by bond

Question 20

100% transmittance means that

Answer 20

none was absorbed

Question 21

0% transmittance means that

Answer 21

all was absorbed

Question 22

Where is the functional group region

Answer 22

> 1500

Question 23

What do Stronger bonds do in IR

Answer 23

higher frequency needed so absorb high wavenumber

Question 24

What do lighter atoms do in IR

Answer 24

higher frequency so absorb high wavenumber

Question 25

What cause a molecule to absorb higher frequency for IR

Answer 25

Bond strength and atom mass

Question 26

Bond type at 3600-3200 and is strong and broad

Answer 26

O-H

Question 27

Bond type at 3500-3200 and is medium

Answer 27

N-H

Question 28

Bond type at 3000-2850 and strong

Answer 28

Csp3-H

Question 29

Bond type at 3150-3000 and medium

Answer 29

Csp2-H

Question 30

Bond type at 3300 and medium

Answer 30

Csp-H

Question 31

Bond type at 2250 and medium

Answer 31

C (Triple bond) C or C (triple bond) N

Question 32

Bond type at 1800-1650 and strong

Answer 32

C=O

Question 33

Bond type at 1650 and medium

Answer 33

C=C

Question 34

Bond type at 1600 or 1500 and medium

Answer 34

Aromatic Ring

Question 35

What happens as C-H bond strength increases

Answer 35

S character increases so higher wavenumber

Question 36

Cl isotope mass number

Answer 36

35 and 37

Question 37

Br isotope mass number

Answer 37

79 and 81