A2- NMR
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What isotope of Carbon is used in carbon NMR?
13C
What does NMR stand for?
Nuclear Magnetic resonance
What are the units used in NMR?
ppm
What is deuterium?
isotope of Hydrogen (2H)
Why is deuterium used in solutions?
as even number of nucleons, so will not produce a signal
What does the area under the peak mean in proton NMR?
amount of protons in that proton environment
What is used as a reference in NMR?
tetramethyl saline (TMS)
Where are Cs/Hs closer to electronegative elements shifted?
to the left
What solvents are used for NMR?
deuterated (H replaced with deuterium)
WHat does a triplet tell you about the number of hs on the neighbouring C atom?
2 Hs (n+1)
What does the integration trace tell you?
number of protons in that environment
Why would reacting an alcohol with D2O remove OH peaks from an H NMR?
OD replaces OH, D has even number of nucleons so does not create a peak
Why is TMS used?
• symmetrical so only one C envt • non-toxic/inert