Synthesis and characterization of the mixed-metal alkylidyne clusters RCFeCo2(CO)9H (R = methyl, ethyl, phenyl)

Electronic and steric control of the formation of C-H-M from M-H-M interactions in carbon-atom-capped transition metal carbonyl clusters. Effect of the metal fragment

“…The spectrum is the same as that published earlier. 12 Previously the spectrum was attributed to a single species, but we have now been able to assign some (17) The spectra appear in the original communication, and a spectrum of the unlabeled compound is shown in Figure 3.…”

“…FeCo2-(CO)9(CHR) was first prepared by Geoffroy et al during a pioneering study on the synthesis of mixed-metal clusters. 12 On the basis of room-temperature NMR spectra and the conventional structural wisdom of the time, the single endo hydrogen was assigned a position associated with the trimetal framework. More recently a crystallographic study of the phenyl derivative has appeared.…”

Toward an Understanding of the Mechanism of Metal Exchange in (Propargyl Alcohol)Co2(CO)6 Clusters: Syntheses and Structures of [η5-C5Ph2R2−C⋮C−TMS)(Fe(CO)2(μ-H)]Co2(CO)6, R = Ph or Et

“…14 Moreover, Geoffroy has reported that MeCCo 3 (CO) 9 and [Fe(CO) 4 ] 2yield, upon protonation, the hydride cluster MeCCo 2 FeH(CO) 9 . 15 Thus the transformation of (HCtC-CH 2 OH)Co 2 (CO) 6 into (HCdCdCH 2 )FeCo(CO) 6 may involve the formation of an intermediate metal hydride, 17; as depicted in Scheme 1, subsequent elimination of water could give the neutral iron-cobalt cluster 15.…”

Organo-transition metal clusters: rational approaches to synthesis, structure, fluxionality, and reactivity

“…Thus. Geoffroy has replaced a Co(CO), unit by the isolobal Fe(CO),-moiety in a tetrahedral cluster (95). Furthermore, recent Russian work (96) has described the addition of Fe,(CO), to a CpMn(CO), (RC=CR1) complex.…”