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please answer question #4

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lecture 11.pdf
Coordination Revie...
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(c) Determine the cquilibrium constant for the following reaction:
[IIg(NII,)4]" + 2 en -> [Hg(en)2]" + 4 NII,
(d) Is this reaction thermodynamically favorable?
4.
The logarithm of the overall equilibrium constant for the reaction of [Cd(HO) ]" with one
mole of tetramethylenediamine, NH2CH,CH2CHCH,NH, is 3.6. The logarithm of the overall
equilibrium constant for the reaction of [Cd(H20) ] with one mole of propylenediamine,
NH2CH2CH2CH2NH2 is 4.5.
(a) Make a sketch to show the chelate rings formed by tetramethylenediamine,
NH2CH2CH2CH2CH2NH2 and propylenediamine, NH2CH2CH2CH,NH2.
(b) Which is the more stable ring system: 7-membered chelate rings or 6-membered chelate
rings?
5.
The high-spin octahedral complex [MIX] reacts with ligand Y to produce [ ML Y]. Assume th
the reaction proceeds through a trigonal bipyramidal intermediate, and that the metal contains 8 d-
electrons. (a) Calculate the CFSE for the octahedral complex. (b) Calculate the CFSE for the trigonal
bipyramidal complex. (c) Calculate the change in the crystal field stabilization energy wher octahedral
[ML,X] becomes trigonal bipyramidal [MLs]. (d) Will the reaction be slower or faster than if ACESE
0? ( b)
ACFSE CFSE(trig. bipy) - CFSE(oct.)
The crystal field splitting diagram for a trigonal biovramidal complex is shown below
that the

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