The mol-ecule of the title compound, C(9)H(14)F(6)N(2)O(8)P(2), lies on a twofold rotation axis that passes through the middle C atom of the three-atom fluoro-methyl-ene unit. The carbonyl and phosphoryl groups are in an antiperiplanar conformation. In the crystal, N-H⋯O=P hydrogen bonds link the mol-ecules into polymeric chains parallel to the c axis.