203060-14-4Relevant articles and documents
Dinuclear rhodium complexes containing a linear C2RhC4RhC2 chain
Gil-Rubio, Juan,Laubender, Matthias,Werner, Helmut
, p. 1202 - 1207 (2008/10/08)
The reaction of trans-[RhCl(=C=CHPh)(PiPr3)2] (1) and trans-[RhCl(=C=CMe2)(PiPr3)2] (3) with 50% aqueous NaOH, in the presence of TEBA, afforded the hydroxorhodium complexes trans-[Rh(OH)(=C=CRR′)(PiPr3)2] (2, 4) in good to excellent yield. Compound 2 (R = H, R′ = Ph) reacted with D2O to give trans-[Rh(OD)(=C=CHPh)(PiPr3)2] (2-d) and with Br?nsted acids HX (X = CF3CO2, OPh, C≡CPh) to yield the corresponding derivatives trans-[Rh(X)(=C=CHPh)(PiPr3)2] (5-7), respectively. Treatment of 2 and 4 with Ph3-SnC≡CC≡CSnPh3 also led to the displacement of the hydroxo ligand and to the formation of the dinuclear complexes tran,trans-[{Rh(=C=CRR′)(PiPr3)2} 2(μ-C4)] (8, 9) in 75-80% yield. The X-ray crystal structure analysis of 9 revealed the presence of a linear 10-atom C=C=RhC≡CC≡CRh=C=C chain with the midpoint of the central C-C bond as a crystallographic center of symmetry.