Consider the following electronic arrangements for the d⁵ configuration.
(i) which of these represents the ground state
(ii) which configuration has the maximum exchange energy.
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Answered by
23
1) (c) Electronic Arrangement of d5 configuration is the ground state.
Reason:
1) It follows Hunds Rule of maximum Multiplicity.
This configuration gives maximum stability due to symmetrical axis as it is half -filled orbital.
2) Maximum no. of Exchange pairs are available,hence More Exchange energy or Increase in Stability.
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2:
Exchange Energy :
It is the decrease in energy when electrons with parallel spin exchange their positions in the degenerate orbitals of a subshell.
More no. of unpaired electrons with parallel spin,
=> More no. of exchange pairs.
=> More Exchange Energy or decrease in systems energy or increase in stability.
Option a) has no exchange pair
b) has 3 exchange pairs (3C2)
c) has 10 exchange pairs. or more no. of unpaired parallel electrons. (5C2)
Hence, (c) arrangement has maximum exchange energy.
Reason:
1) It follows Hunds Rule of maximum Multiplicity.
This configuration gives maximum stability due to symmetrical axis as it is half -filled orbital.
2) Maximum no. of Exchange pairs are available,hence More Exchange energy or Increase in Stability.
--------
2:
Exchange Energy :
It is the decrease in energy when electrons with parallel spin exchange their positions in the degenerate orbitals of a subshell.
More no. of unpaired electrons with parallel spin,
=> More no. of exchange pairs.
=> More Exchange Energy or decrease in systems energy or increase in stability.
Option a) has no exchange pair
b) has 3 exchange pairs (3C2)
c) has 10 exchange pairs. or more no. of unpaired parallel electrons. (5C2)
Hence, (c) arrangement has maximum exchange energy.
Answered by
5
Answer:
c
Explanation:
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