chem312_Coordination_complex_lecture_10_supp

chem312_Coordination_complex_lecture_10_supp - Electron...

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Figure 12.27 The elemental transition metals all have the general configuration [Ar]4s 2 3d n , except for Cr and Cu Electron configurations of the neutral first row transition metal elements 4s 2 3d 1 4s 2 3d 3 4s 2 3d 2 4s 1 3d 5 4s 2 3d 5 4s 2 3d 6 4s 2 3d 7 4s 2 3d 8 3d 10 4s 1 3d 10 4s 2 across periodic table (increasing Z) E n=4 n=3 3p 3s 3d Relative orbitals energies for elements near and including the transition-metals 4s 4p 3d 4s across periodic table (increasing Z) E n=4 n=3 3p 3s 3d 4s 4p 3d 4s 3d 4s 3d 4s Sc Ti Cr Ni Cu V Mn Fe Co 4s d yz d xy 3d xz d z2 d x2–y2 4s d yz d xy 3d xz d z2 d x2–y2 Sc 0 Ti 0 The energy gap between the 3d and 4s orbitals is shrinking as we go across the periodic table 3rd e
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4s d yz d xy 3d xz d z2 d x2–y2 Ti 0 2nd e 4s 2 3d 2 4s d yz d xy 3d xz d z2 d x2–y2 V 0 2nd e 4s 2 3d 3 4s d yz d xy 3d xz d z2 d x2–y2 V 0 4s d yz d xy 3d xz d z2 d x2–y2 Cr 0 By the time you get to Cr the energy gap between the 3d and 4s orbitals is smaller than the energy
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chem312_Coordination_complex_lecture_10_supp - Electron...

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