PS5 - R ecomme nded reading 2 0 21.2 21.4 1 3 2 2.1 22.6 C...

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1 Recommended reading: 20, 21.2-21.4, 13 , 22.1-22.6 Ch 102 Problem Set 5 Due: Tuesday, May 10, before class Problem 1 (20 points) Part A Give the oxidation state, d-electron configuration, and valence electron count for the following compounds: a) [( η 5 -Cp)Mo(CO) 3 ] 2 (M-M singly bonded) b) WCl 2 (PMePh 2 ) 2 (S)(CO) c) Co(CO) 3 (OC) 3 Co Co (CO) 3 H C d) Co(CO) 3 (OC) 3 Co O C C O e) Cl P Cl Cr Cl P Cl N Ph 2 Cy Ph 2 Cl P Cr Cl P N Cy Ph 2 Ph 2 Part B The following are all 18-electron compounds. Draw them. Give the oxidation state, d-electron configuration. a) [CpMo(CO) 2 ] 2 ; predict the M-M bond order. b) CpNi(NO) c) (CH 2 CHCH 2 )Mn(CO) 5 d) Cp 3 ZrCH 3 can be synthesized according to the method below. 1.5 eq NaC 5 H 5 PhCH 3 Cp 3 Zr-CH 3 Cp 2 Zr(CH 3 )Cl Draw the Zr complexes above showing the binding mode of Cp ligands. What are the oxidation state, d-electron configuration, and valence electron count for these Zr complexes? Problem 2 (20 Points) Permanganate MnO 4 - is a tetrahedral ion with an intense purple color that is widely used as an oxidizing agent. The figure below shows a convenient coordinate system for a tetrahedral complex that will be useful for generating a molecular orbital diagram for permanganate.
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2 a) Give the total electron count and d-electron count for Mn. Note that O 2- is a strong π donor and the donated π -lone pairs are considered in electron count. For now do not consider the availability of appropriate orbitals on Mn to accept these electrons and include them in electron count. b) Using the coordinate system shown above, generate the reducible and irreducible representations for the ligand σ -bonding interactions (note that there are two orbitals on oxygen that have σ -symmetry with respect to the Mn-O interaction; for this problem consider only one σ -orbital per oxygen, the second will formally constitute a low energy lone pair on oxygen that should not be included in your analysis). c) Draw an MO diagram incorporating the ligand σ -bonding framework and d, s, and p orbitals on Mn. For full credit, be sure to do all of the following:
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PS5 - R ecomme nded reading 2 0 21.2 21.4 1 3 2 2.1 22.6 C...

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