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Lecture 22 - 1 44 Friday’s midterm was A Easy B Fairly...

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Unformatted text preview: 3/8/10 1 44 Friday’s midterm was ? A) Easy B) Fairly straightforward C) Hard but fair D) Impossible E) There was a midterm on Friday? Exams are marked: Grades posted by the end of the day Solutions posted by the end of the day Will NOT bring midterms to class Pick-up at my office (W3-68): Today 3:45-4:45 pm Tuesday 11:00-12:30 or 2:00-4:30 pm 45 Average = 22/38 = 57.9% Standard deviation = 6.65/38 = 17.5% 5.3. Bonding and splitting of the d-orbitals (Section 23.5) (i) Metal-ligand bonds 46 - lone-pairs from ligands form sigma bonds with metal - these are polar covalent bonds - empty metal orbitals are hybridized and produced the shapes observed - bonds do NOT involve the orbitals containing d-electrons (Valence bond theory) (octahedral, tetrahedral, square planar) “Cannot” explain colour or magnetic properties Problem: (ii) Crystal Field Theory 47 - Review shapes and names of the d-orbitals (CHEM 101) - Effects on energies of d-orbitals as ligands approach A. Octahedral Complex d z 2 d x 2 ! y 2 d xy d xz d yz Ligand lone pair aligned with orbital Ligand lone pair...
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Lecture 22 - 1 44 Friday’s midterm was A Easy B Fairly...

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