1-Oxo-1,2-diphosphacyclopentanone (2) is a ligand with three different site
s for typical coordination. Thus seven types of structural different coordi
nation compounds as well as salts can be received:
2-W(CO)(5); (2-SbCl3)(2), 2((-))-Cu(2+)-2((-)); 2((-))-Co(3+)(H2O).(OH)-2((
-)); (CO)(5)W-2((-))-Cu(2+)-2((-))(CO)(5); (CO)(5)W-2-SbCl3; Cl3Sb-2((-))-C
u(2+))-2((-)))-SbCl3; Cl3Sb((CO)(5)W)-2((-))-Cu((2+))-2((-))(W(CO)(5))SbCl3
;[Cu(en)(2)(H2O)(2)](2+) (2((-))); [Cu(en)(2)(CH3OH)(2)](2+) [2((-))-W(CO)(
5)](2); NR4((+)) 2((-)).