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Sunday, February 9, 2020

Why SF6 is inert where as SF4 is highly reactive towards H20 ?.


The maximum coordination number of sulphur is 6. Hence S cannot accommodate more than 12 electrons around it. SF6 is covalently saturated compound. Thus six fluorine atoms around sulphur protect sulphur from attack by reagent to such an extent that even thermodynamically favorable reaction like hydrolysis (S-O bond is stronger than S-F bond) does not occur. On the other hand, in SF4, the coordination number is only four. Hence sulphur can be attacked by H2O.


Related Questions:

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Question (2): What happen when aq AlCl3 react with Acid or Base?

Question (3): Although anhydrous aluminium chloride is covalent but its aqueous solution is ionic in nature. Why?

Question (4): Arrange in increasing order of extent of hydrolysis [ CCI4, MgCI2, AICI3, PCl5, SiCI4].

Question (5): Although Sulphur contain vacant d-orbital but SF6 does not undergo hydrolysis. Why?

Question (6): CCl4 can not be hydrolysed but SiCl4 can be. Why?

Question (7): What are the hydrolysis products of urea?

Question (8): Why SF6 is inert where as SF4 is highly reactive towards H20?.

Question (9): Why SF6 behaves inert towards hydrolysis?

Question (10): Why PCl3 hydrolysed while NCl3 can not be hydrolysed?

Question (11): Why hydrolysis of NCl3 gives NH4OH and HOCl, while PCl3 on hydrolysis gives H3PO3 and HCl?

Question (12) NCl3 and PCl3 on hydrolysis give different kinds of products. These is because of

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