Cyclic polymetaphosphates have the general fo | vedclass

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(B) The cyclic trimeric metaphosphate is $P_3O_9^{3-}$.In this structure,each phosphorus atom is bonded to two bridging oxygen atoms and two non-bridg

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$P_3O_9^{3-}$ and the trimeric form of $SO_3$ have the same number of $p\pi-d\pi$ bonds

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(B) The cyclic trimeric metaphosphate is $P_3O_9^{3-}$.In this structure,each phosphorus atom is bonded to two bridging oxygen atoms and two non-bridging oxygen atoms (one of which is double-bonded to phosphorus).$1$. The structure consists of a ring of alternating $P$ and $O$ atoms,so there are no $P-P$ linkages.$2$. In $P_3O_9^{3-}$,each of the $3$ phosphorus atoms has one $P=O$ bond,contributing $3$ $p\pi-d\pi$ bonds. Similarly,the trimeric form of $SO_3$ $(S_3O_9)$ has $3$ $S=O$ bonds,each contributing $p\pi-d\pi$ character,making the number of $p\pi-d\pi$ bonds equal.$3$. The $P-O$ bond lengths are not identical because there are $P-O$ single bonds (bridging) and $P=O$ double bonds (terminal).$4$. Each phosphorus atom is surrounded by $4$ oxygen atoms in a tetrahedral geometry,meaning each phosphorus is $sp^3$ hybridised.

Cyclic polymetaphosphates have the general formula $(PO_3)_n^{n-}$. Which of the following statements is true for the cyclic trimeric metaphosphate?

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