Coordination Chemistry Name:(Last)___________________(First)___________________

1 Name the following coordination, determine the coordination number, and determine whether it is trigonal, tetrahedral, square planar, trigonal bipyramidal or octahedral.

i) Na[Co(C2O4)2(H2O)2] ii) [Co(H2O)5Cl]Cl2 iii) K[Al(CN)4] 2 Complete the following statements for the complex ion [NiF(en)2 NH3] CO3

i) en is the abbreviation for ___. iii) The coordination number of Ni is ____. v) The name of the complex is ___.

ii) The oxidation number of Ni is ____ . iv) __ is the counter ion. vi) Draw all possible isomers for the complex

3 Define the following:

i) Isomers

ii) chelating agent

iii) dextrorotatory

4 Answer the following for the following questions for

the structure shown. The chemical formula is: CoH12O6Cl3 i) What ligand(s) are in the coordination sphere?

ii) What are outside the coordination sphere ?

iii) How many d-electrons are on the central metal.

H

HH

Cl

OO

H

Co

H

O

OH

Cl

H

H Cl • 2H2O

5 (i) Would you expect [CrF6]-4 or [W(F)6]-4 to have its spin pairing energy (PE) larger than, equal to, or smaller than its

CF splitting energy, (Δ)? Explain.

ii) Which compound between [CrF6]-4 or [W(F)6]-4 would you expect to absorb longer wavelength of light ? Explain.

(iii) [Cr(H2O)6]2+ is violet. Which ligand between CN- and Cl- will give a green CrL6 complex? Explain.

(iv) Rank the following complex ions in order of decreasing D and energy of visible light absorbed? Explain your choice.

[Cr(CN)6]3- [CoCl6]3- [Cr(en)3]3+

Δ

Energy of light