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Question

Number of Sugden's singlet bonds in PCl5 is :

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Solution

Sudgen supported the theory of octet rule by saying that the Concept of octet can never be disobeyed as was overruled by SIDGEWICK by announcing the maximum rule of co-valency. Sudgen took into account the example of phosphorous pentachloride and told that out of five bonds two are singlet i.e., made by sharing of one electron between two atoms donated by only one participent. in short it is the bond consisting only on one electron and is relatively longer than a covalent bond and is known as half covanlent bond.

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