Shown below are the 10 Dq values (in cm-l) for some iron(III) complexes. [FeX6134 [Fe(H20)6]3+ [FeY6]3 10 Dq (cm) 35000

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Shown Below Are The 10 Dq Values In Cm L For Some Iron Iii Complexes Fex6134 Fe H20 6 3 Fey6 3 10 Dq Cm 35000 1 (129.64 KiB) Viewed 54 times

Shown below are the 10 Dq values (in cm-l) for some iron(III) complexes. [FeX6134 [Fe(H20)6]3+ [FeY6]3 10 Dq (cm) 35000 14000 13100 (a) Suggest the possible identities for X and Y. (2 marks) (b) ) Assuming the pairing energy for all the three complexes is 23800 cm-!, provide a simplified orbital diagram showing the d electron configuration of [FeX6] and [Fe Y6]}-. Also calculate the CFSE (in cm-!) and determine the spin state and magnetic properties of the two complexes. (8 marks) (C) Given the reduction potentials of [Fe(H20).]3+/2+ and [FeY6]3/4 are 0.77 V and 0.21 V (vs. NHE), respectively, and that [FeY6]} has a log B value of 16.3. Calculate the stability constant for [FeY6]and comment on your calculated value. (10 marks)