The homoleptic and octahedral complex of `Co^(2+)` and `H_2O` has ____ unpaired electron(s) in the `t_(2g)` set of orbitals.

Total number of unpaired electrons in O_2^(2-)

The number of unpaired electron(s) in [Fe(H_2O)_6]^(2+) is

t_(2g) orbitals in octahedral complexes are

Give the number of unpaired electrons in t_(2g) set of d-orbitals in [Co(H_(2)O)_(3)F_(3)] complex .

Assertion : [Fe(H_(2)O)_(6)]^(2+) is sp^(3) d^(2) hybridised and paramagnetic complex ion . Reason : [Fe(H_(2)O)_(6)]^(2+) has four unpaired electrons as H_(2)O is a weak field ligand .

Which of the following statements is/are correct ? (i) In octahedral complexes , t_(2 g) orbitals possess low energy as compared to e_(g) orbitals . (ii) In tetrahedral complexes , t_(2 ) orbitals possess high energy as compared to e orbitals . (iii) In octahedral complexes , e_(g) orbitals possess low energy as compared to t_(2 g) orbitals .

Which of the following statements is/are correct? (i) In octahedral complexes, t_(2g) orbitals posses low energy as compared to e_g orbitals (ii) In tetrahedral complexes , t_2 orbitals posses high energy as compared to e orbitals (iii) In octahedral complexes , e_g orbitals possess low energy as compared to t_(2g) orbitals

When a transition metal ion (usually) is involved in octahedral complex formation, the five degenerate d-orbitals split into two set of degenerate orbitals (3+2) . Three degenerate orbitals of lower energy (d_(xy),d_(yz),d_(zx)) and a set of degenerate orbitals of higher energy (d_(x^(2)-y^(2)" and "d_(z^(2)) . The orbitals with lower energy are called t_(2g) orbitals and those with higher energy are called e_(g) orbitals. In octahedral complexes, positive metal ion may be considered to be present at the centre and negative ligands at the corner of a regular octahedron. As lobes of d_(x^(2)-y^(2)" and "d_(z^(2) lie along the axis, i.e., along the ligands, the repulsions are more and so, high is the energy. The lobes of the remaining three d-orbitals lie between the Axis i.e., between the ligands. The repulsions between them are less, so lesser the energy. In the octahedral complexes, if metal ion has electrons more than 3, then for pairing them, the options are (i) Pairing may start with 4th electron in t_(2g) orbitals. (ii) Pairing may start normally with 6th electron when t_(2g)" and "e_(g) orbitals are singly filled. Select incorrect match for the following complexes.