[en] One reports about a new technique for the synthesis of ruthenocene asymmetric derivatives based on photochemical reaction of naphthalene ruthenium complex [CpRu(η⁶-C₁₀H₈)]⁺ (1) with cyclopentadienes and cyclopentadienide-anions. Reaction of 1 compound with cyclopentadiene surplus under visible light irradiation is accompanied by the naphthalene displacement and results in the ruthenocene Cp₂Ru (2a) 73% yield. Reaction of 1 compound with C₅Me₅H results in the pentaruthenocene 2b 73% yield. Structure of the prepared compounds is confirmed by the NMR ¹H data