1c

Question 1

what transitions are we focussing on

Answer 1

dd trnasitions

Question 2

what are the rules in uvvvis

Answer 2

delta S = 0

delta L = +- 1

in a centrosymmetric system: transisitons must occur between orbitals of different symmetry: aka gerade to ungerade!!

Question 3

what transitions does uvvis spec analyse

Answer 3

dd transitions in transition metal complexes

Question 4

dd transitions are often coloured in transition metal complexes bc

Answer 4

they occur in the visible region

Question 5

how are the d energy levels split

Answer 5

dz2 and dx2-dy2 are higher in energy bc they lie on the cartesian axis,, and experience greater M L repulsion as theyre aligned with the L.

Question 6

separation between the dz2,,, dx2dy2 and the day,dzy and dxy isss

Answer 6

delta o if its an octahedral complex

Question 7

what affects delta o

Answer 7

the ligands idenstity

Question 8

spectrochem series!!! starts at weak field and goes to strong field : descibe what goes where

Answer 8

I_ < Br < Cl < F < O2- < H2O < NH3 < CN < PR3 < CO

weak to strong field

pi donor to sigma donor to strong sigma donor and pi acceptor (pi acids)

Question 9

jorgensens rules of average environments : whats it all about

Answer 9

when u have a complex,, the ligands can interchange with the ligands in its environment ,, ligands in the complex can be substituted with ligands in the solution as there are more of them.

the ligands have different field strengths meaning that delta O chnages when they interchange!! changing the observations we see.