P₄O₆ is a ligand for transition metals, comparable to phosphite.
An illustrative complex is P₄O₆·Fe(CO)₄. 
With BH₃, a dimeric adduct is produced:
P₄O₆ is a ligand for transition metals, comparable to phosphite. An illustrative complex is P₄O₆·Fe(CO)₄. 
With BH₃, a dimeric adduct is produced:
Phosphorus trioxide