What is the purpose of each reactant in the preparation of Pd(PPh 3 ) 4 ? In our
ID: 884639 • Letter: W
Question
What is the purpose of each reactant in the preparation of Pd(PPh3)4 ?
In our lab we used Palladium (II) Chloride, Triphenylphosphine, Hydrazine hydrate, dimethyl sulfoxide (DMSO), and under Nitrogen gas. Wondering why this is done under nitrogen gas and why it won't work as well under oxygen at the molecular level. Also, what is the purpose of the DMSO because it isn't in the overall reaction so clearly it is a catalyst of some sort but what is happening at the molecular level? Then wondering how the palladium (II) chloride complex is reduced, and if the triphenylphosphine is the ligand or what is if it isn't. Basically I'm wondering what is going on at the molecular level in this preparation. The full reaction is below:
2 PdCl2 + 8 PPh3+ 5 NH2NH2·H2O 2 Pd(PPh3)4 + 4 NH2NH2·HCl + N2 + 5 H2O
Explanation / Answer
2 PdCl2 + 8 PPh3+ 5 NH2NH2·H2O 2 Pd(PPh3)4 + 4 NH2NH2·HCl + N2 + 5 H2O
1. In this reaction N2 is used to create inert atmosphere.
2. DMSO is used as catalyst. in begining it acts as electrophile and get regeneration takes place after completion of the reaction
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