The compound Ru2(PhNNNPh)4 was oxidized in CH2Cl2 with AgPF6. From a CH2Cl2/(C2H5)2O solution left to evaporate in air for one month blue-green crystals of Ru2(PhNNNPh)4OPF4, in which the PF4O⊖ ion is coordinated to one Ru atom (Ru–O: 220(1) pm), were obtained. Other principal distances are: Ru–Ru 238.5(2) pm, P–O 145.5(11) pm, P–F 159(1) pm. Angles in the PF4O⊖ ion are: O–P–F 111.6(4)°, F–P–F (cis) 82.2(6)°, F–P–F (trans) 136.7(6)°.
