QUESTION 1
(a) Determine, from first principles, the Russell-Saunders term symbol for the
Mn(II) ion in the ground state (free-ion term). Show all the steps in your solution.
The total angular momentum term (J) in the term symbol is not required.
(5)
(b) Using the appropriate Tanabe-Sugano diagram, give the electron configuration
for the Mn(II) free ion corresponding to the $^6$S term symbol. Show all
calculations.
(4)
(c) Using the Tanabe-Sugano diagram, give the term symbol for an Mn(II) ion in
an octahedral high-spin configuration.
(2)
(d) Using the appropriate Tanabe-Sugano diagram, list the spin-allowed electronic
transitions predicted for [Mn(H$_2$O)$_2$Cl$_4$]$^{2-}$.
(3)
(e) Draw the structure of [Mn(H$_2$O)$_2$Cl$_4$]$^{2-}$. Clearly show the geometry at the metal
centre. Draw all possible isomers. Label the isomers.
(6)
