Download department of chemistry ch 102 (inorganic): tutorial no. 5

DEPARTMENT OF CHEMISTRY
CH 102 (INORGANIC): TUTORIAL NO. 5
ANSWERS
1. The following complexes have the indicated effective magnetic moments. Describe
the structure and bonding of the complexes on the basis of the meff values.
K2NiF6 0.0; Ni(NH3)2Cl2 3.3; Ni(PEt3)2Cl2 0.0; Ni(Ph3AsO)2Cl2 3.95.
2. Name the transition metal configurations (both in octahedral and tetrahedral
environments) which are expected to have orbital contribution to the magnetic moment?
3. Which one would you expect to have greater magnetic moment: CoCl422 or CoF642?
Why?
4. Which one would you expect to have greater magnetic moment: CoCl422 or CoI422?
Why?
5. Calculate µeff for Dy2(SO4)3.8H2O
6. Calculate µeff for Gd3+
7. What is Neel temperature?
8.
(a)
Fe(CO)5--------------More electron density
and more back bonding;
lower γCO
Fe(CO)4Br2---------Heigher oxidation state.
(b)
Pph3 is electron donating and would increase the electron density in metal
resulting in lower γCO
Mo(CO)4(Pph3)2----------- lower γCO
(C)
Pme3 is a better electron donor than Pph3 and so;
Mo(CO)4(PMe3)2 will have lower γCO