chem chapter 8

Question 1

What is an NMR spectroscopy?

Answer 1

Nuclear magnetic resonance (NMR) spectroscopy is the study of molecules by recording the interaction of radiofrequency (Rf) electromagnetic radiations with the nuclei of molecules placed in a strong magnetic field.

Question 2

What is IR spectroscopy?

Answer 2

Infared spectroscopy is the spectroscopy that deals with the infrared region of the electromagnetic spectrum, that is light with a longer wavelength and lower frequency than visible light.

it tells us the functional groups in the molecule and fingerprint region

Answer 3

the fingerprint region is a unique identifier

Question 4

what is a base peak?

Answer 4

The base peak represents the most abundant species and so is assigned a relative abundance of 100

Question 5

What does C13 NMR give?

Answer 5

It gives number of the Carbon environments

Question 6

What does H1 NMR give?

Answer 6

It gives the number of hydrogen environments

Question 7

what does H NMR spectroscopy show?

Answer 7

HNMR spectroscopy shows peaks in a low resolution

Question 8

mass spectrometry

Answer 8

Mass spectrometry is an analytical tool useful for measuring the mass-to-charge ratio (m/z) of one or more molecules present in a sample.

Question 9

what are the isotopes of Br

Answer 9

2; 79 and 81, both 50%

Question 10

what are the isotopes of Cl

Answer 10

2

Question 11

carbonyl functional group is?

Answer 11

C=O