chem450practicetest2

chem450practicetest2 - Chem 450 Practice Exam(1 In the...

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Chem 450 Practice Exam (1) In the following molecule, the rate of substitiution of Y was studied. It was found to be independent of the entering group. The dependence on the leaving group, Y, and the ligand trans to the leaving group, X, is shown below. What is the mechanism for this reaction and why did you choose that one? Rh O X O O O O O Y O Rh O from Shriver and Atkins, Inorganic Chemistry third ed. (2) Draw a mechanism that would make the CO ligands in the following molecule equivalent in NMR. Mo P Cl Cl CO CO P
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(3)(25 pts) Predict the product(s) of the following reactions and write the type of reaction it is (substitution, etc). (a) trans -Ir(CO)I(PPh3)2 + H 2 -------> ____________ + HI (show mechanism) (b) Mo(CO) 6 + xs CH 3 CH ------> (c) fac -Re(CH3)(CO) 2 (PPh3)3 + PMe3 ------> (no CO is evolved)
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(d) trans -CrI 4 (H 2 O) 2 + 2PPh3 -------> (draw correct isomer) (e) ( h 5 -C 5 H 5 )Re(Et)(CO) 2 -----> _________ + CH 2 CH 2 (show mechanism) (4) Count the electrons in the following species (a) Re(H 2 4 Cl 2 (b)
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chem450practicetest2 - Chem 450 Practice Exam(1 In the...

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