Advanced Inorganic Chemistry 4305
Homework assignment # 5
Chapters 11, 12
1. Predict whether these complexes would be labile or inert and explain (briefly)
your choices.
a) Ammonium oxopentachlorochromate(V)
1.83 μB
b) Potassium hexaiodomanganate
3.82 μB
c) Potassium hexacyanoferrate(III)
2.40 μB
d) Hexammineiron(II) chloride
5.45 μB
2. The rate of H2O exchange by [M(H2O)6] is greater for M=Fe than for M=Ru by a
factor of 108. Explain
3. Which of the following would have a greater rate constant for ligand exchange via
an Id mechanism. Briefly explain your answer.
a. CoCl3(PEt3)3 or CoCl3(PMe3)3
b. CoCl6 or CoCl3(CO)3
c. CoCl3(NH3)3 or CoCl3(H2O)3
d. CoCl6-3 or TiCl6-3
4. Data for the reaction:
a. Co(NO)(CO)3 + As(C6H5)3  Co(NO)(CO)2(As(C6H5)3) + CO
In toluene at 45oC is given below. Find the rate constant(s) for the substitution
reaction
[As(C6H5)3] (Mo/L)
0.0014
0.098
0.525
1.02
5. The rate constants for the reaction:
kobs (s-1)
2.3
3.9
12
23
CrX+2 + *Cr+2  *CrX2+ + Cr2+
are:
Xk (M-1 s-1)
F
1.2 x 10-3
Cl
11
Br
60
N3
1.2
Explain the differences in the rate constants in terms of the probable mechanism
of the reaction.
6. Write the platinum-containing product for each of the following reactions and
indicate the stereochemistry.
a. [Pt(NH3)Cl3]- + NO2- 
b. [Pt(CN)Cl3]- + NO2- 
c. [PtCl4]2- + 2 CO 
7. When two possible isomers of [Pt(NH3)2Cl2] react with thiourea (tu) , one product
is [Pt(tu)4]2+ and the other is [Pt(NH3)2 (tu)2]2+ . Identify the initial isomers and
explain the results.
8. Suggest a structure for Cp2Fe(CO)2