SME
Inorganic Chemistry · Problem type
Elementary steps of organometallic reactions
Use this for “IrCl(CO)(PPh₃)₂ reacts with H₂ to give IrH₂Cl(CO)(PPh₃)₂. Which elementary step is this, and how do the oxidation state and coordination number change?”
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Which elementary step is it?
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Count the metal’s oxidation state and its ligands before and after: the two changes name the step.
Assumptions
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Hydride (H⁻), alkyl (R⁻), aryl and halide ligands each count as one negative ligand when the oxidation state is worked out.
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Phosphines, CO and alkenes are neutral ligands that give two electrons each.
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The changes are for the metal: its oxidation state and its coordination number, the number of ligands bound to it.
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