Reactions of trans-Carbonyl(Chloro)-[Bis(Triphenylphosphine)]Rhodium(I) with Substituted Cyclopentadienyl Tricarbonyl Molybdenum Anions

Reactions of trans-carbonyl(chloro)[bis(triphenylphosphine)]rhodium(I): trans-ClRh(CO)(PPh₃)₂ with substituted cyclopentadienyl tricarbonyl molybdenum anions, [Mo(CO)₃(η ⁵ -C₅H₄R)]⁻ (R=H; COCH₃) in tetrahydrofuran (THF) at 55°C for 24 h yielded two monometallic complexes as by-products: [Rh(CO)(PPh₃)(η⁵-C₅H₄R)] (R = H (1a); COCH₃ (2a)) and two main heterobimetallic compounds: [RhMo(CO)₄(PPh₃)₂(η⁵-C₅H₄R)] (R = H (1b); COCH₃ (2b)). These compounds were characterized by elemental analysis, IR and ¹H NMR spectra. The molecular structure of (2a) was determined by X-ray diffraction.