Ruthenium naphthalene complexes with a carboxy-substituted cyclopentadienyl ligand

The oxidation of the ruthenium naphthalene complex [(C₅Me₄CH₂OH)Ru(C₁₀H₈)]⁺ gave the carboxylic acid [(C₅Me₄COOH)Ru(C₁₀H₈)]⁺ which was further converted into the phenylalanine amide {[C5Me4CONHCH(CH2Ph)COOMe]Ru(C10H8)}⁺; the structures of both acid and amide were determined by X-ray diffraction analysis.