What is the best structure for po4 -3

[rashida564]

i think it should have double bond with o

 

[Bystander]

i think it should have double bond with o

What in particular makes you think that?

 

[rashida564]

because it is better to have the central atom to be natural so i should make one double bond and the other is single bond

 

[dextercioby]

The only stable phosphorus oxides are P_4 O_6 and P_4 O_{10}. P_4 O_3 doesn't exist.

 

[rashida564]

i don't say p4o3 i mean Phosphate and i want to know that is the stable lewis structure becouse some book make all the bond are single and some book make one double bond and the other is single bond

 

[dextercioby]

i don't say p4o3 i mean Phosphate and i want to know that is the stable lewis structure becouse some book make all the bond are single and some book make one double bond and the other is single bond

O
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Oh, so you mean PO_{4}^{3-}. The Lewis structure is O=P-O with over-octet structure for P. If quantum mechanics is brought into picture, one can follow Pauling's theory of delocalized electrons, mesomeric/resonant structures.

 

[DrDu]

All bonds are single bonds. The negative charges are stabilized by either the solvent or counter ions. In gas phase, phosphate ions aren't stable.

 

[DrDu]

All bonds are single bonds. The negative charges are stabilized by either the solvent or counter ions. In gas phase, phosphate ions aren't stable.

 

[epenguin]

This is nearly always pictured as one double bond ≡P=O with three single bonds P-O^-, you won't go very far without meeting it.

 

[rashida564]

i don't know quantum mechanics so can anyone help me what is the most stable lewis and can central atom have charge