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Chapter: 12th Chemistry : p-Block Elements-II

Structure of oxides and oxoacids of phosphorus

Phosphorous forms phosphorous trioxide, phosphorous tetra oxide and phosphorous pentaoxides

Structure of oxides and oxoacids of phosphorus

Phosphorous forms phosphorous trioxide, phosphorous tetra oxide and phosphorous pentaoxides

In phosphorous trioxide four phosphorous atoms lie at the corners of a tetrahedron and six oxygen atoms along the edges. The P-O bond distance is 165.6 pm which is shorter than the single bond distance of P-O (184 pm) due to pπ-dπ bonding and results in considerable double bond character.

In P4O10 each P atoms form three bonds to oxygen atom and also an additional coordinate bond with an oxygen atom.



Terminal coordinate P-O bond length is 143 pm, which is less than the expected single bond distance. This may be due to lateral overlap of filled p orbitals of an oxygen atom with empty d orbital on phosphorous.

Oxoacids of Phosphorous-Structure:


Oxoacids of Phosphorous-Preparation:



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