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The colour and tlie mason for the deep coloration of [Fe(NCS)6]3- and [Fe(bpy)3]2+ respectively are
- a)dark red, d-d transition; blood red, charge transfer
- b)blue, charge transfer; blood red, charge transfer
- c)blood red, charge transfer; dark red, charge transfer
- d)blue, charge transfer; dark red, d-d transition
Correct answer is option 'C'. Can you explain this answer?
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The colour and tlie mason for the deep coloration of [Fe(NCS)6]3-and [...
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The colour and tlie mason for the deep coloration of [Fe(NCS)6]3-and [...
Explanation:
The color of a transition metal complex is determined by the electronic transitions that occur within the complex. In the case of [Fe(NCS)6]3-, the color is dark red, which is indicative of a d-d transition. In the case of [Fe(bpy)3]2, the color is blood red, which is indicative of a charge transfer.
D-D Transition:
- D-d transition refers to the electronic transition that occurs between the d orbitals of the metal ion.
- The d orbitals in the transition metal ion split into different energy levels in the presence of ligands.
- When a transition metal complex absorbs light, an electron from one of the lower energy d orbitals is excited to a higher energy d orbital.
- The energy difference between the d orbitals corresponds to a specific wavelength of light, which gives the complex its color.
- In the case of [Fe(NCS)6]3-, the complex absorbs light in the visible range, resulting in a dark red color. This indicates that the color is due to a d-d transition.
Charge Transfer:
- Charge transfer refers to the transfer of an electron from one species to another.
- In a transition metal complex, charge transfer can occur between the metal ion and the ligands.
- When a transition metal complex undergoes charge transfer, an electron is transferred from a ligand to the metal ion or vice versa.
- This transfer of electrons results in a change in the electronic configuration of the complex and leads to a characteristic color.
- In the case of [Fe(bpy)3]2, the complex absorbs light in the visible range, resulting in a blood red color. This indicates that the color is due to a charge transfer.
Conclusion:
Based on the given information, the color and the reason for the deep coloration of [Fe(NCS)6]3- and [Fe(bpy)3]2 are blood red, charge transfer and dark red, charge transfer, respectively. Therefore, option C is the correct answer.
The color of a transition metal complex is determined by the electronic transitions that occur within the complex. In the case of [Fe(NCS)6]3-, the color is dark red, which is indicative of a d-d transition. In the case of [Fe(bpy)3]2, the color is blood red, which is indicative of a charge transfer.
D-D Transition:
- D-d transition refers to the electronic transition that occurs between the d orbitals of the metal ion.
- The d orbitals in the transition metal ion split into different energy levels in the presence of ligands.
- When a transition metal complex absorbs light, an electron from one of the lower energy d orbitals is excited to a higher energy d orbital.
- The energy difference between the d orbitals corresponds to a specific wavelength of light, which gives the complex its color.
- In the case of [Fe(NCS)6]3-, the complex absorbs light in the visible range, resulting in a dark red color. This indicates that the color is due to a d-d transition.
Charge Transfer:
- Charge transfer refers to the transfer of an electron from one species to another.
- In a transition metal complex, charge transfer can occur between the metal ion and the ligands.
- When a transition metal complex undergoes charge transfer, an electron is transferred from a ligand to the metal ion or vice versa.
- This transfer of electrons results in a change in the electronic configuration of the complex and leads to a characteristic color.
- In the case of [Fe(bpy)3]2, the complex absorbs light in the visible range, resulting in a blood red color. This indicates that the color is due to a charge transfer.
Conclusion:
Based on the given information, the color and the reason for the deep coloration of [Fe(NCS)6]3- and [Fe(bpy)3]2 are blood red, charge transfer and dark red, charge transfer, respectively. Therefore, option C is the correct answer.
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The colour and tlie mason for the deep coloration of [Fe(NCS)6]3-and [Fe(bpy)3]2+respectively area)dark red, d-d transition; blood red, charge transferb)blue, charge transfer; blood red, charge transferc)blood red, charge transfer; dark red, charge transferd)blue, charge transfer; dark red, d-d transitionCorrect answer is option 'C'. Can you explain this answer?
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