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I know that in PCl5 phosphorus is in +5 state and can't go in any further state. But in a book of my coaching class they state that it can act as an reducing agent through chlorine. Is this statement valid. If so please provide an example.

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  • $\begingroup$ They didn't give any proper example but stated this reaction PCl5 = PCl3 + Cl2 on heating where chlorine changes from -1 to 0 state. But i don't consider this as an proper example. $\endgroup$ – Appy Dec 19 '18 at 9:14
  • $\begingroup$ Why? That's a redox reaction all right. $\endgroup$ – Ivan Neretin Dec 19 '18 at 9:32
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    $\begingroup$ If you are looking for the way to make pretty much anything work as a reducing agent, react it with $\ce{F2}$. $\endgroup$ – Ivan Neretin Dec 19 '18 at 9:57
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    $\begingroup$ No, we are talking about normal conditions; I guess that will suffice. PCl5 will go to PF5 and Cl2, or maybe even ClF3. $\endgroup$ – Ivan Neretin Dec 19 '18 at 12:17
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    $\begingroup$ The Great Wall of China is by no means weak. Most written sources underline its robustness and strength, and rightly so. Yet I'm pretty confident that if we nuke it, we will make quite a hole in it, even though I've never seen this statement written in a respectable book. Same thing here. $\endgroup$ – Ivan Neretin Dec 19 '18 at 12:31

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