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The title compound, [FeRu(C 5 H 5 )(C 2 N 3 )(C 17 H 14 P) 2 ], was obtained by reaction of Cp(dppf)RuCl [dppf = 1,1′-bis­(diphenyl­phosphan­yl)ferrocene] with sodium dicyanamide in dichloro­methane. The Ru II  atom is capped by an η 5 -cyclo­penta­dienyl (Cp) ring, a chelating dppf and a terminal C 2 N 3  unit, giving three-legged piano-stool geometry. The C—N—C angle of the N(CN) 2  ligand [120.8 (6)°] is significantly smaller than that in the corresponding diruthenium complex [127.2 (9)°; Zhang  et al.  (2003  ▶ ).  Inorg. Chem.   42 , 633–640] due to steric hindrance between the two {Cp(PPh 3 ) 2 Ru} building blocks. Disorder was found in the dichloro­methane solvent mol­ecule, which was refined as disordered over two positions, with a site-occupancy ratio of 0.53:0.47 (2).

acta crystallographica. section e

[1,1′-Bis(diphenylphosphanyl)ferrocene-κ2P,P′](η5-cyclopentadienyl)(dicyanamido-κN)ruthenium(II) dichloromethane monosolvate