金属有机第四章基元反应2
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the metal to the ligand.
For each pair of complexes shown below, circle the oxidation state and d-electron count!
Both complexes are d8, 16e-, and have an empty
The Ir complex is 18e-and does not have an empty The Mo complex is d0and has no d electrons to do
General cases:
it is best if the metal center is electron deficient. This can be accomplished by having electron-withdrawing ligands (e.g., CO), cationic charge(s), and/or coordinative unsaturation.
This is due to the very poor overlap of the directed sp3 hybrid orbitals on the alkyls used to bond to the metal centers. Alkyl and hydride eliminations have been