Write down the number of 3d electrons in each of the following ions:
Ti²⁺, V²⁺, Cr³⁺, Mn²⁺, Fe²⁺, Fe³⁺, Co²⁺, Ni²⁺and Cu²⁺

Indicate how would you expect the five 3d orbitals to be occupied for these hydrated ions (octahedral)

Question

Write down the number of 3d electrons in each of the following ions:
Ti²⁺, V²⁺, Cr³⁺, Mn²⁺, Fe²⁺, Fe³⁺, Co²⁺, Ni²⁺and Cu²⁺

Indicate how would you expect the five 3d orbitals to be occupied for these hydrated ions (octahedral)

Philoid · Accepted Answer

S.no	Ion	Configuration	Number of 3d electrons	No. of unpaired Electrons	3d orbitals
1	Ti²⁺	3d²	2	2	T²_2g e⁰_g
2	V²⁺	3d³	3	3	t³_2g e⁰_g
3	Cr³⁺	3d³	3	3	t³_2g e⁰_g
4	Mn²⁺	3d⁵	5	5	t³_2g e²_g
5	Fe²⁺	3d⁶	6	4	t⁴_2g e²_g
6	Fe3+	3d⁵	5	5	t³_2g e²_g
7	Co²⁺	3d⁷	7	3	t⁵_2g e²_g
8	Ni²⁺	3d⁸	8	2	t⁶_2ge_2g
9	Cu²⁺	3d⁹	9	1	t⁶_2ge_3g

Note: In an octahedral field, the d-orbitals split into two sets of orbitals, the set of orbitals ( d_xy,d_yz,d_xz) with lower energy is called t_2g and the set of orbitals (d_x2-y2 and d_z2) with higher energy is called e_g

Write down the number of 3d electrons in each of the following ions:Ti2+, V2+, Cr3+, Mn2+, Fe2+, Fe3+, Co2+, Ni2+and Cu2+Indicate how would you expect the five 3d orbitals to be occupied for these hydrated ions (octahedral)

Write down the number of 3d electrons in each of the following ions:
Ti²⁺, V²⁺, Cr³⁺, Mn²⁺, Fe²⁺, Fe³⁺, Co²⁺, Ni²⁺and Cu²⁺

Indicate how would you expect the five 3d orbitals to be occupied for these hydrated ions (octahedral)