NMR Spectroscopy 6.3.2

practical uses of NMR

MRI scan

what isotopes are identified

¹³C

¹H

why is carbon 13 and a proton used in NMR

uneven number of nucleons which absorb radio waves

what shift to go for ?

always go for highest shift

what do the peaks show in carbon NMR

the number of different carbon environments 

what is the reference point in carbon NMR

Tetramethyl silane ( TMS)

why is TMS used in Carbon NMR

gives a single sharp peak

inert ( doesn’t react with sample)

volatile ( separated from sample easily)

TMS displayed formula

Si(CH₃)₄

what does carbon environment mean

number of carbon atoms attached to different atoms ( what the atom is attached to aswell)

when do methyl groups have the same carbon type

attached to same carbon