564487-72-5Relevant academic research and scientific papers
Unusual reactivity of the unsaturated dimolybdenum complex [Mo2(η5-C5H5)2 {μ-OP(OEt)2}{μ-P(OEt)2} {μ-P(OEt)2}(CO)2]
Alvarez, Celedonio M.,Garcia, M. Esther,Riera, Victor,Ruiz, Miguel A.,Bois, Claudette
, p. 2741 - 2748 (2003)
Reaction of the doubly metal-metal bonded compound [Mo2Cp2{μ-OP(OEt)2}{μ- P(OEt)2}(CO)2] with [Fe2(CO)9] leads to the 46 e- cluster [FeMo2Cp2 {μ-OP(OEt)2}{μ-P(OEt)2}(CO)5]. By contrast, reaction of [Mo2Cp2{μ-OP(OEt)2} {μ-P(OEt)2}(CO)2] with SnCl2 leads to the incorporation of two molecules of reagent: one molecule inserts into the Mo-O bond, and the other one adds to the Mo=Mo double bond to finally yield the tetranuclear compound [Mo2Cp2{μ-(EtO)2 POSnCl2}{μ-P(OEt)2}(μ-SnCl2) (CO)2] as confirmed by an X-ray diffraction study. Complex [Mo2Cp2{μ-OP(OEt)2}{μ-P(OEt)2} (CO)2] reacts with HCC(p-C6H4Me) to give a mixture of the alkyne-bridged compound [Mo2Cp2 {μ-η2:η2HCC(p-C6H4Me)} {μ-(EtO)2POP(OEt)2}(CO)2] and the alkenyl-bridged [Mo2Cp2{μ-η1, κ1:η2-OP(OEt)2 CH=C(p-C6H4Me)}{μ-P(OEt)2}(CO)2] (structure confirmed through an X-ray diffraction study). This requires either P-O reductive elimination between phosphonate and phosphido ligands or insertion of the incoming alkyne into the Mo-P (phosphonate) bond, all these uncommon processes occurring at room temperature. The solution structure of the new compounds is analyzed on the basis of their IR and NMR data and X-ray diffraction studies, and the reaction pathways prevalent for the title compound are discussed on the basis of the data available.
