you do not need to draw any compounds out.

Please help with all the questions with questions marks. you do not need to draw any compounds out. These are fairly short answers please help with all.

A. Square Planar Complexes 

Picture a four ammonia molecules: NHHH These will attach to the metal atom through the “extra” bond position on the nitrogen.

Between a model of cis-diamminedichloridoplatinum(II) and model of trans-diamminedichloridoplatinum (II). 

Which conformation should be polar? Which one should be soluble in water and why? 

B. Tetrahedral Complexes. 

1. Construct a water molecule. This will attach to the metal atom through one of the “extra” bond positions on the oxygen. 

2. Construct a model of ammineaquabromidochloridoiron(II). 

3. Using the model from step 1 as guide construct the mirror image of the model. 

4. Rotate one of the models to try to make it match exactly (superimpose) with the other model. 

5. Replace the aqua ligand with another ammine ligand in both of the models. 

6. Rotate one of the models to try to make it match exactly (superimpose) with the other model. 

7. Did the mirror images of the models of ammineaquabromidochloridoiron(II) match up exactly (superimpose) with one another? 

8. Did the mirror images of the models of diamminebromidochloridoiron(II) match up exactly (superimpose) with one another? 

9. Which of these compounds exists as stereoisomers? 

C. Octahedral complexes. 

1. Construct 6 ethylenediamine molecules: (we are not showing the hydrogen atoms here). These will attach to the metal atom through the nitrogen atom’s lone pairs.CCNN 

2. Construct the model for the tris(ethylenediamine)cobalt(II) ion. 

3. Using the model from step 2 as a guide, construct the mirror image of the model in step 2. 

4. Rotate the model from step 3 to try to make it match up exactly (superimpose) with the model from step 2. 

5. Replace one of the ethylenediamines in each model with 2 chloride ions. The two chloride ions should be in adjacent positions around the central metal atom (cis- conformation). 

6. Rotate one of the modified models to try to make it match up exactly (superimpose) with the other one. 

7. Replace one more of the ethylenediamines with 2 ammonia molecules in each of the models. 

a. While the chlorides are in the cis- position, examine the structures to see if the models match up exactly (superimpose). 

8. In each model assembled in step 7 swap the positions of two of the appropriate ligands so that the chloride ions are on opposite sides of the metal atom (trans- conformation). 

9. Rotate one of the modified models to try to make it match up exactly (superimpose) with the other one. 

10. Did the mirror images of the models of the tris(ethylenediamine)cobalt(II) ion match up exactly (superimpose) with one another?

11. Does this complex ion exist as enantiomers? 

12. Did the mirror images of the models of the cis-dichloridobis(ethylenediamine)cobalt(II) match up exactly (superimpose) with one another? 

13. Does this compound exist as enantiomers? 

14. Did the mirror images of the models of either cis- or trans-diamminedichlorido (ethylenediamine)cobalt(II) match up exactly (superimpose) with one another? 

15. Which of these compounds exist as enantiomers if any?