Lecture 16 - d-Orbital Energy Split in a Tetrahedral Field...

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1 Chem 172 Advanced Inorganic Chemistry Lecture 16/May 7 rd Coordination Bond Theory d-Orbital Energy Split in a Tetrahedral Field Octahedral vs. Tetrahedral Field ' t ~4/9 ' o Tetrahedral Field In tetrahedral structure, only high spin case is considered due to the smaller splitting parameter ( ' t ~4/9 ' o <P) . LFSE: Octahedral vs. Tetrahedral For LFSE point of view: d 3 , d 8 favors more octahedral, and d 2 , d 7 may form tetrahedral: VX 4- and CoX 4- . Octahedral Field, Tetragonal Distortion and the Jahn-Teller Effect
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2 Tetragonal Distortion and the Jahn-Teller Effect Jahn-Teller effect: if the ground state of complex is orbitally degenerate, and asymmetrically filed, then the complex distorts so as to remove the degeneracy and achieve a lower energy. d 1 , d 2 , low spin d 4 , d 5 , d 7 high spin d6 d7, and d9 E.g.: [Cu(H 2 O) 6 ] 2+ Square Planar Complexes Further distortion of octahedral towards the limit, removing the z-axial ligand to get square planar structure. Square planar
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This note was uploaded on 06/27/2010 for the course CHEMISTRY Chem 172 taught by Professor Duan,x. during the Spring '10 term at UCLA.

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Lecture 16 - d-Orbital Energy Split in a Tetrahedral Field...

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