MYTUTOR SUBJECT ANSWERS

428 views

What is the basis of an NMR spectrum?

Nuclear Magnetic Resonance (NMR) is a spectroscopic technique used to detect certain nuclei in a molecule.

1H and 13C are the most commonly identified nuclei , however nuclei with an odd mass number can exhibit an nmr spectrum (ie. 14N, 17O).

NMR works by exerting a strong magnetic force on the nuclei in molecules. The spinning nuclei (ie 1H) possess a magnetic field, which when acted on by the nmr field will align either WITH or AGAINST the applied magnetic field.

The with state is lower in energy than the against state. The transititon/flip from with - against is known as resonance. Resonance is the energy difference of these two states, and is characteristic of the nuceli. Therefore, from nmr resonance values, the nuclei type and the 'environment' it's in, can be determined.

The 1H environments will be the same in a methane (CH4) molecule, but different in CH3CH2CH2Cl and therefore the protons have different resonance values - these are plotted on a spectrum, against intensity and this is the NMR spectrum.

Joanna T. Uni Admissions Test .UKCAT. tutor, Mentoring -Personal Stat...

2 years ago

Answered by Joanna, who tutored A Level Chemistry with MyTutor


Still stuck? Get one-to-one help from a personally interviewed subject specialist

98 SUBJECT SPECIALISTS

£24 /hr

Yasmin A.

Degree: Medicine (Other) - University College London University

Subjects offered: Chemistry, Science+ 6 more

Chemistry
Science
Physics
Maths
Human Biology
-Personal Statements-
-Medical School Preparation-

“Hello! I am a medical student at University College London.  All students have an individual learning style - this is why my teaching is tailored to you. With experience of tutoring students aged 6-19, I am confident in adapting my s...”

£20 /hr

Lewis M.

Degree: MChem (Hons) in Chemistry with Medicinal Chemistry (Masters) - St. Andrews University

Subjects offered: Chemistry

Chemistry

“About me: I am currently in my final year at the University of St Andrews, on course to graduate with a First Class Master's degree in Medicinal Chemistry in May 2017. I'm very passionate about science education; specifically chemistry...”

MyTutor guarantee

£20 /hr

Hugo D.

Degree: Chemistry (Masters) - Bath University

Subjects offered: Chemistry, Physics+ 2 more

Chemistry
Physics
Maths
French

“I am a first year undergraduate studying chemistry at the university of Bath. I am very passionate about chemistry (and very interested in the pther sciences!) and I hope that I will be able to instil some of that passion into you. Sci...”

About the author

£24 /hr

Joanna T.

Degree: Chemistry (Masters) - Oxford, University College University

Subjects offered: Chemistry, Biology+ 4 more

Chemistry
Biology
.UKCAT.
.BMAT (BioMedical Admissions)
-Personal Statements-
-Medical School Preparation-

“Hi there! I`m Joanna, a Chemistry graduate from Oxford University. I am currently based in Brighton studying Medicine as a second degree”

You may also like...

Other A Level Chemistry questions

What is Kw?

What are the different forms of elemental carbon?

What happens when some alkali is added to a buffer solution?

Using chemical reagents in test tubes, distinguish between isomers: A CH3CO(CH2)2CHOH, B CH3CH(OH)(CH2)2CHO and C C(CH3)2OHCOCH3

View A Level Chemistry tutors

Cookies:

We use cookies to improve our service. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok