Delocalized electrons occurs, the first structure, bond P-O bond but reduced P = O and P-O-P increased mg. helps stabilize makes compounds more stable complex.
The delocalized electrons give birth PO bond diminished, but the bond P = O and POP angle increases. Mg to help stabilize complexes make it more stable.
The structure was born delocalized electrons make bond P-O decreased but bond P = O and angle P-O-P increased. Mg will help stabilize make complex, more stable