2. Give the final product for the reaction sequence shown below. (2.5%)

 (a)

(b)

7. A molecular orbital diagram of a ML6 octahedral complex with sigma-donor and pi-acceptor interaction is shown below. Please fill out all the square blank fields (i - xx) with the proper irreducible representation. (6%)Please give your answer with the corresponding label of the empty field.Note: sigma-donor symmetry representation: A1g, Tlu, Egpi-acceptor symmetry representation: T1g, T2g, Tlu, T2uThe figure credit: adapted from 5th Ed. "Inorganic Chemistry" by Gary L. Miessler

c) If a very weak peak appears at 2θ=30.5° (relative intensity 1%), how would you determine whether it arises from a second/impure phase, or it still corresponds to a single phase? (10%)

b) Please give the possible (hkl) of x, y, and z.

a) Please determine whether the unknown crystalline sample is simple cubic, face-centered cubic (fcc), or body-centered cubic (bcc). Explain your reasons.

5. Cubic close packing (ccp) and hexagonal close packing (hcp) are two common closest-packed structures. Explain the key differences between ccp and hcp. (4%)

4. Provide a stepwise synthesis (give reagents) for the following transformation. (3%) 

3. Draw a reasonable mechanism for the following transformation. (3%) 

d)

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