a) Identify the ground terms for Fe2* in the case of free ion and octahedral complexes; [Fe(H;O)«]²* and [Fe(CN)6]*. b) Write all spin-allowed transitions with their energy terms for the complexes using Tanabe-Sugano diagram. c) The absorption spectrum of [Fe(H2O)6]²* shows a maximum at 1000 nm with a shoulder at 1250 nm. Estimate the value of A, for [Fe(H2O)«]²* in cm' unit and determine the transition responsible for this shoulder. d) Give a comparison on the color of the complexes.

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a) Identify the ground terms for Fe²* in the case of free ion and octahedral complexes; [Fe(H2O)6]²* and
[Fe(CN)6]+.
b) Write all spin-allowed transitions with their energy terms for the complexes using Tanabe-Sugano
diagram.
c) The absorption spectrum of [Fe(H2O)6]²* shows a maximum at 1000 nm with a shoulder at 1250 nm.
Estimate the value of A, for [Fe(H2O)«]?+ in cm' unit and determine the transition responsible for this
shoulder.
d) Give a comparison on the color of the complexes.
Transcribed Image Text:a) Identify the ground terms for Fe²* in the case of free ion and octahedral complexes; [Fe(H2O)6]²* and [Fe(CN)6]+. b) Write all spin-allowed transitions with their energy terms for the complexes using Tanabe-Sugano diagram. c) The absorption spectrum of [Fe(H2O)6]²* shows a maximum at 1000 nm with a shoulder at 1250 nm. Estimate the value of A, for [Fe(H2O)«]?+ in cm' unit and determine the transition responsible for this shoulder. d) Give a comparison on the color of the complexes.
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