topic 7 - modern anayltical teqniues

Question 1

molecular ion peak

Answer 1

peak furthest to the right
mr of the compound

Question 2

m+1 peak

Answer 2

peak due to isotope of carbon

Question 3

fragmentation

Answer 3

molecule is split into fragments
the peak are the mr of the possible fragments
need to put positive charge on fragments

Question 4

infrared spec

Answer 4

troughs are where the bonding wavelengths are
quick
need to talk about peaks that are there and those that are missing
use values

Question 5

absorption of red light

Answer 5

streching-bond length increases and decreases
bending- bond angle increases and decreases

Question 6

how mass spec works

Answer 6

x- deflection by electromagnetic field
a- high mass deflected less
b- ions deflected and detected
c- low mass deflected more
under vacuum so the particles don’t collide with air and deflect