Q 7. Crystal field splitting has what effect on d orbital energies? What effect

ID: 833446 • Letter: Q

Question

Q 7. Crystal field splitting has what effect on d orbital energies? What effect does this have on the appearance of complex ions?

Q 8. How many unpaired electrons would be in [FeF 6 ] - 3 ? In [Fe(CN) 6 ] - 3 ? Why is there a difference?

Q9. Provide transition metal oxidation state, number of electrons, and the correct name for each of the following complexes:

a) [Pt(NH 3 ) 4 ](ClO 4 ) 2

b) [ ReH 9 ] - 2 (think about the ox. State of H)

c) Na 2 [Fe(CO) 4 ]

d) [IrF 6 ] - 3

e) K 3 [Fe(CN) 6 ]

f) [PtCl 2 (NH 3 ) 2 ]

7) Due to crystal splitting degenrate d-orbitals splitts into various levels w.r.t to Complex compound geometry

for Example if it is Octahedral structure d-orbitals splits to give higher energy eg (doublet) orbitals and lower energy t2g (triplet) orbitals

if it is Tetrahedral structure d-orbitals splits to give higher energy t2g (triplet) orbitals and lower energy eg (doublet) orbitals.

due to magnitude difference of wavelength observerd corresponding complamentary colors can emitted

different structures can have different colors with the sme metal and ligands

[FeF 6 ] - 3 ......... Fe+3 .....[Ar]3d^5 ........ 5 unpaired electrons

In [Fe(CN) 6 ] - 3 .......Fe+3..........[Ar]3d^5......1 unpaired electron

because F- is weak ligand in [FeF 6 ] - 3

CN- is strong ligand that is why pairing of electrons takes place to give 1 unpaired electron

complexes:.............................................................oxidation state

a) [Pt(NH 3 ) 4 ](ClO 4 ) 2..................................... Pt^+2

b) [ ReH 9 ] - 2 (think about the ox. State of H)................Re^+7

c) Na 2 [Fe(CO) 4 ].......................................................Fe^-2

d) [IrF 6 ] - 3............................................................ Ir^+3

e) K 3 [Fe(CN) 6 ].................................................... Fe^+3

f) [PtCl 2 (NH 3 ) 2 ]................................................ Pt^+2

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