Write down the number of 3d electrons in each of the following ions: Ti 2+ , V 2+ , Cr 3+ , Mn 2+ , Fe 2+ , Fe 3+ , Co 2+ , Ni 2+ and Cu 2+ Indicate how would you expect the five 3d orbitals to be occupied for these hydrated ions (octahedral)

Question

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)