CHEMISTRY 115 HOMEWORK 7 NAME _______________

DUE MAY 23, 01 COMP HMWRK:none

  1. 1.Write the formula, including the correct charge, for a complex that contains Cr+3 ion, two NH3 ligands and four NO2-1 ligands.
  2. 2. Give the systematic names for the following complex compounds.
  3. a) K2 [CuCl4]
  1. [W(NH3)3(H2O)3] (NO3)2

    2.  

  2. Na3 [Fe(CN)5CO]

    3.  

  3. K2 [Mo(NCS)6]

 

  1. Give the chemical formula for each of the following complex ions and compounds.

a) tris(oxalato)ferrate(III) ion

b) dichlorobis(ethlyenediamine)platinum(IV) ion

c) potassium tetroxochromate(VI)

d) sodium bromochlorodicyanonickelate(II)

 

  1. The following compound is called diethylenetriamine abr "dien", H2N-CH2-CH2-NH-CH2-CH2-NH2. When it bonds to a metal, it is a ligand with three donor atoms
  1. Which are the most likely donor atoms?

    2.  

  2. What is the coordination number in the complex Co(dien)2+3 ?

    3.  

  3. Sketch the structure of the complex.

    4.  

     

     

     

     

     

  4. Which compound would be expected to be more stable is aqeuous solution, [Co(dien)2]+3, or [Co(NH3)6]+3?

 

5. Draw and name all the geometric isomers for the following complexes.

A. [Co(en)2Br2] B. [Pt(NH3)2(SCN)2]

 

 

 

 

 

 

 

 

 

 

Which, if any, would have an optical isomer? Draw them if present

Which, if any, other type of isomer might be expected for this ion?

6. The complex [NiF4]2- is paramagnetic but [Ni(CN)4]2- is diamagnetic. Explain this difference.

 

 

 

 

7. Predict the number of unpaired electrons in each of the following complex ions.

A. [V(H2O)6]3+ C. [Cr(CO)6]

 

 

 

 

 

 

 

B. [CoF4]2- (tetrahedral; why?) D. [PdCl4]2- (square planar; why?)

 

 

 

 

8.. Draw the valence bond (localized electron pairs) and crystal field diagrams for each of the following.

A. [V(H2O)6]3+ C. [Cr(CO)6]

B. [CoF4]2- D. [PdCl4]2-