Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Orgo > Chapter 15 concepts > Flashcards

Chapter 15 concepts Flashcards

1
Q

Pauli exclusion

A

two electrons with opposite spin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

electron density

A

probability of finding an electron in a particular region of space

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Radio Wave

A

nuclear magnetic resonance spectroscopy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Photon and Frequency

A

Directly proportional

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

The presence of a chiral center

A

would prevent two protons from being interchangeable by reflection. the protons are diastereotopics

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What cant be analyzed by NMR spectrometer

A

Nucleus with even number of protons and even numbers of neutrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

how many nuclear spin states for 1H?

A

2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

type of electromagnetic radiation in NMR

A

Radio wave

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

shielded protons

A

experienced less net magnetic field strength smaller than the applied magnetic field

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

energy gap between spin states for a H1 nucleus and the strength of the external magnetic field

A

directly proportional

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

strength of the magnetic field determines

A

range of frequencies for NMR

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Common in H NMR

A

CDCl3, CCl4, CD2CN, D2O

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Uncommon in H NMR

A

CH3OH

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

number of signals in a H NMR spectrum

A

Indicates the number of different kinds of protons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Location of signals in a H NMR spectrum

A

indicates electronic environment of absorbing protons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

area under each signal in a H NMR

A

indicates the relative number of protons in the signal

17
Q

shape and multiplicty

A

indicates the number of neighboring protons

18
Q

Complex signal in NMR

A

free induction decay

19
Q

Free induction decay is converted into a spectrum via a methematical technique called a

A

fourier transformation

20
Q

The H NMR spectrum of bromoethane shows a signal at 3.5 ppm when the spectrum is recorded using a 60 MHz spectrometer, where do you expect to see the signal if a 300 MHz instrument is used instead?

A

3.5 ppm

21
Q

Tetramethlsilane

A

0

22
Q

aromatic protons signal 7-8

A

diamagnetic anisotropy

23
Q

CH split

A

doublet

24
Q

CH2 split

A

Triplet

25
Q

off resonance decoupling 13C NMR allows

A

13C-1H splitting

26
Q

broadband decoupling in 13C NMR surpresses

A

13H-1H splitting

27
Q

C NMR Carbonyl

A

160-200

28
Q

C NMR Aromatic

A

110-160

29
Q

C NMR Alkenes

A

90-135

30
Q

C NMR Alkynes

A

70-90

31
Q

C NMR Alkanes

A

5-80

32
Q

H NMR Carboxylic Acid

A

11-15

33
Q

H NMR Aldehyde

A

9-10

34
Q

H NMR Aromatic

A

6.5-8.5

35
Q

H NMR Alkenes

A

4.5-6.5

36
Q

H NMR Alkanes

A

0.5-4.5

37
Q

H NMR alkanes bonded to N, O, halogens

A

3-3.5

Orgo (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions