A particularly interesting case is the attachment of the hydrogen molecule H
2
as such. This situation was discovered by Kubas.
Let's start by activating tungsten carbonyl through the action of cycloheptatriene, which replaces three molecules of CO :
[W(CO)
6
] + C
7
H
8
→ [W(CO)
3
(C
7
H
8
)] + 3 CO
The tungsten environment remains at 18 electrons. The action of a phosphine whose R groups are very bulky, such as the isopropyl...
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