for d3 and d8,, what transition equals delta
delta = first transition
for d3 and d8 what is the order of orbitals
4A2g
4T2g
4T1g(F)
4T1g(P)
if u have 4 energy levels how many transition can u have
3
do all the transitions start from the ground states energy level
yes
if u have Cr(H20)6 3+ as ur complex
the first transition = 17400 cm-1
second transition = 24600 cm-1
third transition = 37800 cm-1
what is the value of delta and b
okay so bc it’s d3 the first transition is equal to delta
then to find B u need to do v2/v1 to get 1.41
then go across the x axis till u get a value for delta/B = 24
then do delta,, the first transition / value from graph to get B.
aka 17400/24 = 725cm-1
why is the Ni 2+ aka d^8 transition from 3A2g to 1Eg so small
bc when a singlet state is close to a triplet state (look at the spins) the singlet gets more triplet character and weakens the laporte rules
is there always an 1Eg peak
yesss just depends how allowed the transition is due to mixing and weakening the rules.
aka when it’s close to the triplet state it’s allowed
what cm-1 is the 1Eg transition at
it’s at 16000 cm-1
why are some peaks broad
bc of vibrations
frank condon: electronic transition occurs faster than the motion so u get a broad peak
there’s a small delta aka gap between energy levels when ligand is far. the closer the ligand is,, the more delta and gap there is. there’s a range of energies as one vibration occurs
why is a peak sharp
the bond is still vibrating but it’s insensitive to the ligand field.
aka as delta changes there’s no difference in the ES and GS
can u describe the diagrams for the broad and sharp peaks
broad peak = kinda like a cone with ES and GS getting further away as delta decreases
sharp peak: Gs and Es remain the same distance apart no matter the delta
where is the first Td transition normally seen near
normally near the IR region
so small in energy
why is the Td transition so low in energy
bc the splitting is smaller due to it being split by Td.
Td is 4/9ths the magnitude of Oh delta.
are all Td transitions observed
nope
only 2/3 of them are
are Td or Oh transitions more intense
Td are more intense
more intense transition means what in terms of symbol
larger molar extinction coefficient
when u have high spin d5 what is this
this is a sextet bc u need to count all the e- spins,, then do 2s+1 which gives us 6
think back to what an orgel diagram is
it’s the graph with the diff energy levels and lines
when we have a curved orgel diagram what do we normally get
we get a broad peak
if we have a straight line for our energy level in an orgel diagram what do we get
a sharp peak
transitions in high spin d5 are what
they’re insensitive to a change in delta.
they only due to a change in e- spin.
low spin d6 has a strong or weak first transition
it has a weak first transition bc it’s spin forbidden
a more intense transition is due to what
energy levels being level.
orrrrr BC THEY RESPECT THE LAPORTE RULES YAYYAYYAY
What does smt being A term mean
it means when u draw out the config,, u can’t rearrange the e- in any different way.
like look at low spin d6,, it’s A bc there’s no hole to put the e- in a diff place
