CHEM 4701 Lecture Notes - Lecture 16: Bridging Ligand, Af2
Document Summary
Mixed valence compounds to describe them, using robin-day classifications same metal w/ same metal, but each metal is different oxidation states. -> same metals @ 2 different oxidation states bridged by a ligand looking @ inner sphere electron transfer. Mx+ ~~~ my+ my+ ~~~ mx+ in some cases: mmct --> metal-to-metal charge transfer. 3 different classes: class 1, class 2, and class 3 differentiated by how easy it is to transfer the electron class i. -> large energy difference => fully localized electronic state you are stuck at the beginning of the rxn shown above no electron transfer happens. -> 2 metal sites w/ very different ligand environment (ligand geometry, hard/soft ligand) properties: equivalent to just putting them together and nothing happening no magnetic interaction, like an insulator (b/c no electron transfer) -> color, electronic spectra will be the sum of the spectra of the 2 metal sites. -> no characteristic mmct (no charge transfer, so can"t see it)
