15664-75-2Relevant academic research and scientific papers
ORGANOCOBALT CLUSTER COMPLEXES. XXX. CARBON MONOXIDE LIGAND MIGRATION DURING THE SOLVOLYSIS OF HALOMETHYLIDYNETRICOBALT NONACARBONYL COMPLEXES. USEFUL SYNTHESES OF CARBOXYMETHYLIDYNETRICOBALT NONACARBONYL DERIVATIVES
Seyferth, Dietmar,Rudie, Cynthia Nivert
, p. 365 - 378 (1980)
The reaction of aliphatic alcohols, ROH, and amines, RR'NH, with bromo- and chloro-methylidynetricobalt nonacarbonyl gives products of types ROC(O)CCo3(CO)9 and RR'NC(O)CCo3(CO)9, respectively.These reactions are accelerated by triethylamine.In the presen
ORGANOCOBALT CLUSTER COMPLEXES XXXI. THE REACTIONS OF BROMO- AND CHLORO-METHYLIDYNETRICOBALT NONACARBONYL WITH THIOLS AND LITHIUM THIOLATES
Seyferth, Dietmar,Rudie, Cynthia Nivert,Merola, Joseph S.,Berry, Donald H.
, p. 91 - 102 (1980)
The action of alkanethiols on bromomethylidynetricobalt nonacarbonyl in the presence of triethylamine gives thioesters, RSC(O)CCo3(CO)9, as principal products, but arenethiols react to give tars.A more useful reaction is that between arenethiols and ClCCo3(CO)9, which gives ArSCCo3(CO)9 complexes as the principal products.The action of lithium alkane- and arenethiolates on BrCCo3(CO)9 in hydrocarbon medium lead to formation of thioesters, but in the presence of triethylamine or in diethyl ether solution complexes of type Co3(CO)4(SR)5 are formed instead.Possible mechanisms of these reactions are discussed.
Formation of a cluster-substituted cyclopentadienone from PhC2CCo3(CO)9. Crystal structure of Ph2C4C(O)2
Worth, Gillian H.,Robinson, Brian H.,Simpson, Jim
, p. 337 - 355 (2007/10/02)
The cluster-substituted alkyne PhCCCCo3(CO)9 (1), obtained by a coupling reaction between BrCCo3(CO)9 and PhCCH, rearranges to give the cyclopentadienone Ph2C4C(O)2 (2).Alkyne 1 with Co2(CO)8 gives PhC2CCo3(CO)9 (3).Compound 2 was characterised by X-ray crystallography at 123 K.The structure is that of a symmetrically substituted cyclopentadienone with tricobaltcarbon cluster moieties substituted α to the carbonyl group and phenyl substituents in the β positions.Various findings suggest that the formation of 2 does not proceed via a meta llacycle.Electrochemical data shows that the clusters and the cyclopentadienone ring act as independent redox centres, indicating that there is no contiguous ?-interaction.
Synthesis and X-ray structure of CO3(CO)9[CC(O)OCHC]Co2Fe(CO)9, an unexpected product of the reaction of [PPh4][HFe(CO)4] with [Co3(CO)9CCO][PF6]
Alami, Mohamed Kalam,Dahan, Fran?oise,Bonnet, Jean-Jacques,Mathieu, René
, p. 1391 - 1394 (2008/10/08)
[Co3(CO)9CCO][PF6] reacts at room temperature with [PPh4][HFe(CO)4] to give the complex Co5Fe-(CO)8[CC(O)OCHC] as the main product of the reaction (20% yield). An X-ray diffraction study shows that this complex consists of CO3 and Co2Fe triangles joined by a CC(O)OCHC group which can be described as an ester of a vinylidene group. The vinylidene part of the ligand is bonded to the Co2Fe triangle. This compound crystallizes in the monoclinic space group C2h5-P21/n with cell dimensions a = 8.645 (2) ?, b = 12.990 (2) ?,c = 26.883 (2) ?, β = 93.32 (2)°, and Z = 4. The structure was solved and refined to R and Rw values of 0.034 and 0.032, respectively, by using 5299 reflections. Other products isolated in this reaction are Co3(CO)9(μ3-CH) (4% yield), Co3(CO)9(μ3-CCH3) (1% yield), Fe3(CO)12 (8% yield), HFe-Co2(CO)9(μ3-CH) (traces), Fe2Co(CO)10(CCH3) (traces), [Co3(CO)9C]2CO (4% yield), and [Co3(CO)9C]2 (4% yield).
