Question

6. The Wacker oxidation reaction, which is used to produce ~ 4 million tons of acetaldehyde annually, is shown below. Determine the valence electron count (are these 18 electron complexes?) and oxidation state of each Pd complex (1-7). Bonus: What is the role of the CuCl2 complex? но порочок Indraypalladation H2011. .CI 1/2O2 + 2HCLY 2Cuci 1 2H20 H2O2Cuch OH2 CI-Polri PdOH2 H2O OH2 HCI HCI reductive elimination H₂O1.pdc HO H2O....H acetaldehyde Ho 5 OH

Answer 1

There is a total of 7 Palladium complexes. the valence electron count and oxidation state of these complexes are given below,

1. valence electron count: 16

oxidation state: +2

2. valence electron count: 16

oxidation state: +2

3. valence electron count: 16

  oxidation state: +1

4. valence electron count: 15

oxidation state: +1

5. valence electron count: 16

oxidation state: +2

6. valence electron count: 16

oxidation state: +2

7. valence electron count: 18

oxidation state: 0

In this mechanism, Complex 6 undergoes reductive elimination making the complex 7 oxidation state 0. to oxidize the Pd complex and making it reusable CuCl₂ is used.