12154-91-5

Basic information

• Product Name: Cobalt, hexacarbonyl[m-[(h2:h2-ethynyl)benzene]]di-, (Co-Co)
• Synonyms: Cobalt,hexacarbonyl(ethynylbenzene)di- (6CI,7CI); Cobalt, hexacarbonyl[m-(ethynylbenzene)]di-, (Co-Co)(8CI); Benzene, ethynyl-, cobalt complex;(Phenylacetylene)hexacarbonyldicobalt; (m-Phenylethyne)bis(tricarbonylcobalt);Hexacarbonyl(phenylacetylene)dicobalt; Hexacarbonyl(m-(h2:h2-ethynyl)benzene)dicobalt;Hexacarbonyl(m-phenylacetylene)dicobalt
• CAS NO: 12154-91-5
• Molecular Formula: C14H6 Co2 O6
• Molecular Weight: 388.184
• Mol File: 12154-91-5.mol
• Article Data: 19

Chemical Properties

• CAS DataBase Reference: Cobalt, hexacarbonyl[m-[(h2:h2-ethynyl)benzene]]di-, (Co-Co)(CAS DataBase Reference)
• NIST Chemistry Reference: Cobalt, hexacarbonyl[m-[(h2:h2-ethynyl)benzene]]di-, (Co-Co)(12154-91-5)
• EPA Substance Registry System: Cobalt, hexacarbonyl[m-[(h2:h2-ethynyl)benzene]]di-, (Co-Co)(12154-91-5)

Safety Data

• Hazardous Substances Data: 12154-91-5(Hazardous Substances Data)

Upstream product

• 536-74-3 phenylacetylene 
• 15226-74-1 dicobalt octacarbonyl 
• 123676-33-5 methyl(phenylethynyl)silane 
• 10177-59-0 1,2-bis(dimethylarsino)tetrafluorocyclobutene 
• 137928-05-3 (methyl){(η2-phenylethynyl)dicobalthexacarbonyl}silane 
• 6738-06-3 phenylethynylmagnesium bromide 
• 123676-35-7 (Me)(H)(Cl)Si{(η2-CCPh)Co2(CO)6} 
• 15041-50-6 tetracobaltdodecacarbonyl 

Downstream Products

• 141527-17-5 2-methylbut-3-yne-2-olpentacarbonyl(triphenylphosphine)dicobalt 
• 138565-61-4 {Co2(μ-PhC.tplbond.CH)(μ-P2Ph4)(CO)4} 
• 138565-58-9 {Co2(μ-PhC.tplbond.CH)(CO)5(P2Ph4)} 
• 12078-25-0 dicarbonylcyclopentadienylcobalt 
• 39545-99-8 2-phenylcyclopent-2-enone 
• 30126-74-0 1,2-diphenylcyclopent-2-en-1-ol 
• 1432754-73-8 C₁₇H₁₈O 
• 1432909-50-6 C₁₇H₁₈O 

Relevant articles and documents

Formation of a cluster-substituted cyclopentadienone from PhC2CCo3(CO)9. Crystal structure of Ph2C4C(O)2

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, Coordination Study, and Catalytic Pauson-Khand Reactions of QuinoxP*(CO)4-μ-Alkyne Dicobalt Complexes

The coordination of the P-stereogenic and sterically demanding bisphosphine QuinoxP* to μ-alkyne dicobalt hexacarbonyl complexes was studied experimentally and computationally. Whereas the coordination occurred exclusively in a chelating fashion, the diastereoselectivity was highly substrate dependent. However, it could be explained from the computed structure and energies of the different coordination modes. The fluxional behavior of these complexes was also studied computationally. Their performance as catalysts for the Pauson-Khand reaction was explored, and outstanding reactivity was observed. Although the asymmetric induction was low to moderate, the stereochemical outcome could be mechanistically rationalized. This report provides promising results in terms of reactivity and mechanistic understanding for further developments of highly active chiral catalysts for intermolecular Pauson-Khand reactions.

Carbamate as an accelerating group in intermolecular Pauson-Khand reaction

The Pauson-Khand reaction (PKR) is a powerful means for the construction of cyclopentenones. However, its applications have been limited to the intramolecular version of this reaction because poor yield and regioselectivity are often the major problems in intermolecular PKR. Here we describe that a carbamate moiety in alkene substrate accelerates this intermolecular PKR. The reaction of N-4-dimethylaminophenyl O-allyl carbamate with alkyne-cobalt complex gave cyclopentenones in high yield (up to 90%) and regioselectivity (>9:1).

The Pauson-Khand reaction of medium sized trans-cycloalkenes

Medium sized trans-cycloalkenes are unusually reactive in the intermolecular Pauson-Khand reaction (PKR) with regard to typical monocyclic alkenes. This is due to the ring strain imparted by the E stereochemistry. The PKR of these alkenes offers a modular, regioselective and straightforward entry to trans fused [n.3.0] bicyclic scaffolds (n = 6-8). The Royal Society of Chemistry.