Exchange energy (Eex)

Exchange energy (Eex) #copper #nitrogen #exchangeenergy

1. Concept of Exchange energy
(E
ex)
Dr. MithilFalDesai
Shree Mallikarjun and Shri Chetan Manju Desai College
Canacona Goa

2. Exchange energy (E
ex)
??????
????????????=෍
??????(??????−1)
2
??????
Nitrogen[He] 2s
2
, 2p
3
2p
x2p
y2p
z 2p
x2p
y2p
z
N-number of electrons with parallel spin
K-constant
or
Electronscanexchangetheirposition
withotherelectronshavingparallelspin.

3. Exchange energy (E
ex)
??????
????????????=෍
??????(??????−1)
2
??????
2p
x2p
y2p
z 2p
x2p
y2p
z
N-number of electrons with parallel spin
K-constant
or
Electronscanexchangetheirposition
withotherelectronshavingparallelspin.
Nitrogen[He] 2s
2
, 2p
3

4. ??????
????????????=
3(3−1)
2
??????
=3K
??????
????????????=
2(2−1)
2
??????
=1K
Exchange energy (E
ex)
??????
????????????=෍
??????(??????−1)
2
??????
N-number of electrons with parallel spin
K-constant
2p
x2p
y2p
z 2p
x2p
y2p
z
orNitrogen[He] 2s
2
, 2p
3

5. ??????
????????????=
5(5−1)
2
??????+
5(5−1)
2
??????
=20 K
Exchange energy (E
ex)
??????
????????????=෍
??????(??????−1)
2
??????
N-number of electrons with parallel spin
K-constant
Cu [Ar] 3d
10
, 4s
1
Cu [Ar] 3d
9
, 4s
2
??????
????????????=
5(5−1)
2
??????+
4(4−1)
2
??????
=16 K
Higher the exchange energymore will be the stability of the electronic configuration