12101-59-6Relevant academic research and scientific papers
57Fe MOESSBAUER SPECTROSCOPIC STUDY OF SOME CLUSTERS RELATED TO Fe3(CO)12
Collins, Mary P.,Spalding, Trevor R.,Deeney, F. Tony,Longoni, Giuliano,Pergola, Roberto Della,Venaelaeinen, Tapani
, p. 243 - 254 (1986)
The 57Fe Moessbauer spectra of Fe3(CO)12-related clusters (2-), , , , , , , , and have been recorded at 78 K.The data are compared with published data for other M3 clusters.Generally, the isomer shifts (δ) fall within a narrow range, for example with compounds containing Fe or Fe and Ru and four or five CO ligands per metall, all δ values lie between 0.29 and 0.36 mm s-1 even though the ligands may be terminal, doubly bridging or triply bridging.Values of quadrupole splitting (Δ) are much more susceptible to changes in the Fe environment, for example the Fe(CO)4 sites have Δ values from about zero t in > to 1.52 tCOtbr in (2-)>.The quadrupole splitting of the Fe site in (0.77 mm s-1) clearly indicates that the structure of this cluster is not exactly similar to that of .Substitution of CO by phosphine in general leads to small changes in δ and Δ if the geometry of the Fe site is unaltered.However, Δ especially can be affected if phosphine substitution causes changes in geometry or if there is multiple substitution.
The synthesis and properties of derivatives, and a high-yield general route to mono- and di-substituted derivatives of ; the crystal and molecular structure of
Cardin, Christine J.,Cardin, David J.,Kelly, Norah B.,Lawless, Gerard A.,Power, Michael B.
, p. 447 - 456 (1988)
The clusters (1: R = Me, C3H5, C6H5, or C6H4-2-Me) have been prepared at low temperature from and RCN in the presence of Me3NO.Compounds 1 react essentially quantitatively with a wide range of two-electron donors, L, (viz.: CO, PPh3, P(OMe)3, PPh2H, PPh2Me, PF3, CyNC (Cy = cyclohexyl), P(OEt)3, SbPh3, PBu3, AsPh3, or SnR2 (R = CH(SiMe3)2)) to give (2).In some cases (2), on treatment with Me3NO and then L' (L' = a second two-electron donor) yields in high yield.The crystal and molecular structures of 1 (L = NCC6H4Me-2) have been determined by a full single crystal structure analysis, and shown to have an axial nitrile coordinated at the unique iron atom, with two CO groups bridging the other two metal atoms.
OXYGEN ATOM TRANSFER REACTIONS TO METAL CARBONYLS. KINETICS AND MECHANISM OF CO SUBSTITUTION REACTIONS OF M3(CO)12 (M equals Fe, Ru, Os) IN THE PRESENCE OF (CH3)3NO.
Shen,Shi,Gao,Shi,Basolo
, p. 2414 - 2418 (2007/10/02)
Reported are the rates of reaction and activation parameters for CO substitution reactions of M//3(CO)//1//2 (M equals Fe, Ru, Os) with L (L equals PPh//3, P(OPh)//3, AsPh//3) in the presence of (CH//3)//3NO. In aprotic solvents the reactions are too fast
