3/2 so T =(1.00Ã10. 5. /27.86Kâ3/2. ) 2/3. =(3590). 2/3. = 234K. 8. Let E be the translational kinetic energy of one gas molecule. The probability distribution is f (E) = 2Ï E. 1/2. (Ïk. B. T). 3/2 e. âE /(k. B. T). ; 0â¤E a) (2 points) What
Name _________________________________________________________ (please print)
1. Show all the steps (i.e., draw the catalytic cycle) for the Monsanto acetic acid synthesis. Include a detailed description of the processes taking place and point out the rate determining step. (10 points)
1
2. [Co(NH3)6]2+ has absorption bands at 9,000 and 21,100 cm-1. Calculate ∆0 and B for this ion, using the attached Tanabe-Sugano Diagram. Hint: The 4T1g → 4A2g transition in this complex is too weak to be observed. (10 points)
2
3. State the types of isomerism that may be exhibited by the following complexes, and draw structures of the isomers. (4 points each) a.
[Co(en)2(ox)]+
b.
[Cr(ox)2(H2O)2]-
c.
[Co(en)(NH3)2Cl2]2+
d.
[PtCl2(PPh3)2]
e.
[Co(en)3]3+
3
4. Describe the bonding in (η4-C4H4)Fe(CO)3 (i.e., develop MO diagrams for both the C4H4 fragment and the Fe(CO)3 fragment). Explain why the complex is diamagnetic. (10 points)
4
5. Give likely products for the following reactions. Do not forget to assign stereochemistry where appropriate. (2 points each) a.
Fe(H2O)63+ + SCN- →
b.
[(C2H4)PtCl3]- + NH3 →
c.
cis-[RhCl4(H2O)2]- + H2O →
d.
NiCl2 + 2C3H5MgBr →
e.
(η5-Cp)2(CH3)Ta=CH2 + Al(CH3)3 →
6. Give chemical names for the following compounds or ions: (2 points each) a.
[ReH9]2-
b.
Rb[AgF4]
b.
Na[AlCl4]
d.
[Ag(NH3)2][BF4]
e.
[Mn(CN)6]4-
5
7. Carbonic anhydrase II is present in red blood cells and catalyzes the reversible hydration of CO2: H2O + CO2 ↔ [HCO3]- + H+ Based on the schematic representation of the active site in human carbonic anhydrase II (CAII) given below, develop a detailed catalytic cycle for the hydration of CO2 catalyzed by CAII. (10 points): H O Zn2+ N N H
N NH
6
N
NH
8. At low temperature and pressure a gas-phase reaction can occur between iron atoms and toluene. The product A, a rather unstable sandwich compound, reacts with ethylene to give compound B. Compound B decomposes at room temperature to liberate ethylene; at –20 ºC it reacts with P(OCH3)3 to give Fe(toluene)[P(OCH3)3]2, C. Suggest structures for compounds A, B, and C. (10 points)
9. Determine the number of valence electrons in each of the following compounds. Hint: Not all of the compounds obey the 18-electron rule! (2 points each) a. Fe(CO)5