Question

Ligand Field theory and spectrochemical assignment: Use the LS coupling approach to determine the free ion states for a p³ configuration & identify the ground state term. In order to use the LS approach you must:

1) Determine the number of microstates for the p³ configuration (show work)
2) Construct a microstate table
3) Reduce the table to its constituent free-ion terms and give their symbols
4) Identify the ground state term

Answer 1

Page No. Date po configuration 10 -1 TL values Each unpaired electron has spin + 2 for p configuration s= £ x 3 - I values for each orbital is given L = 1+0+ (-1) ₂ - 1 of in ps : Number formula microstate = NI 61 where M - Toral capacity of orbital n number of electron present Today microsate in 6x5x4 x7x2/01 zxxxy - p3 120. Total microstate Microstate table MS I -3/2 -16 11,0 tīT i o o 여 ī o ī o at -I-T, ī Tõŏ td 7 1 - -Tint t o o -1,-10 it to

2 Page No. Date 4 Ground state term: 25 +1 "ASL-s Values 0 1 2 s P D Term symbol 3 4 fla Here for p consiguration as described above 1:0 S - 3/2 Here Lo so term symbol is s (2x3 +175 - 450 Lis= 0 + 3/2 I Ļ-s=-36 If orbital is exactly half bied or than half kiered then Lts is used so ground state feom is more assh