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The article of NIIC researcher Konchenko S.N. and his German collaborators is published in Inorganic Chemistry (IF 4.593)
«Intramolecular Phosphorus−Phosphorus Bond Formation within a Co2P4 Core»Inorg. Chem. 2013. V. 52. No. 24. P. 14231−14236DOI: 10.1021/ic402159y
The formation of phosphobutadien ligand from two alkyne-like fragments in coordination sphere of [(Cp‴Co)2P4Sm(C5Me4R)2] (R = methyl or propyl).
The reduction of [(Cp‴Co)2(μ,η2:2-P2)2] (Cp‴ = 1,2,4-tBu3C5H2) with the samarocenes, [(C5Me4R)2Sm(THF)n] (R = Me or n-propyl), gives [(Cp‴Co)2P4Sm(C5Me4R)2]. This is the first example of an intramolecular P−P coupling in a polyphosphide complex upon reduction of the transition metal. The formation of the P−P bond is not a result of the direct reduction of the phosphorus atoms but is induced by a rearrangement of the positive charges between the metal atoms.