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c) Between t(2g) and e(g) sets of d-orbi...

c) Between `t_(2g)` and `e_(g)` sets of d-orbitals of a central metal in an octahedral complex, which set has higher energy?

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In octahedral complex the central metal ion, surrounded.by 6 ligands. The repulsion is more when the metal d-orbital directed towards the ligand and less when it is away from the ligands. So `d_(x^(2)-y^(2)) and d_(z^(2))` orbitals are towards the ligand. Hence they experience more repulsion and will be raised in energy. So they forin eq set
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