In the given image chemistry subjects question . please answer me fast. please fast
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(1) In an octahedral complex [MX6]n±+, the metal atom or ion is placed at the centre of regular octaherdron at six vertices of the octahedron.
Among five degenerate d-orbitals, two orbitals namely dx2−y2 and dz2 are axial and have maximum electron density along the axes, while remaing three d-oritals namely dxy,dyz and dzx are planar and have maximum electron density in the planes and in- bewteen the axes.
(3) Hence, when the ligands approach a metal ion, the orbitals dx2−y2 and dz2 experience greater repulsion and the orbitals dxy,dyzanddzx experience less repulsion.
(4) Therefore the energy of dx2−y2 and dz3 increase while the energy of dxy,dyzanddzx decrease and five d - orbital lose degeneracy and split into two point group . The orbitals dxy,dxyanddzx form t2g group of lower energy while dx2−y2 and dz2 form eg group of higher energy .
Thus t2g has three degenerate orbitals while eg has two degenerate orbitals.
(5) Experimental calculations show that the energy of t2g orbitals is lowered by 0.4Δ0 or 4Dq and energy of eg orbital is increased by 0.6Δ or 6Dq. Thus energy difference between ty and eg orbitals is Δ0 or 10Dq which is crystal field splitting energy.
(6) CFSE increases with the increasing strength of ligands and oxidation state of central metal ion.
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