15E.6 Flashcards
how does the 13C NMR spectrum look like for a compound
it is usually a straight horizontal line just above the horizontal axis but with vertical lines called signals or peeks that show the signals produced by 13C
the number of vertical line in a 13C NMR spectrum tells you
the number of different chemical environments of carbon atoms in the molecule, but not necessarily the total number of carbon atoms
the potion of the vertical lines on the x axis in an 13C NMR tells you
the chemical shift of each carbon atom, and with reference to the list of chemical shifts, it will allow you to deduce the chemical environment
a carbon atoms chemical environment is based on
the groups it is attached to for example CH3 - CH2 - CH2 - OH the CH3 and the CH2s are attached to different groups so they would have different chemical environments so we would except them to have different peek in the 13C NMR
how many peaks should propan-2-ol have
its structure CH3 - CH(OH) - CH3 it would have two peaks since the CH3s have the same chemicals environment
why would the peak of CH3s be more than the peak of CH(OH) in CH3 - CH(OH) - CH3
because the CH3s would have the same signal so the peak is caused by 2 carbons instead of one
analysis of the Propan-1-ol NMR spectrum
page 145
analysis of the Propan-2-ol NMR spectrum
page 145
