55926-07-3

Upstream product

• 36116-67-3 2-butyne-3-onehexacarbonyldicobalt 
• 603-35-0 triphenylphosphine 
• 12154-91-5 (phenylacetylene)hexacarbonyldicobalt 

Relevant academic research and scientific papers

The photochemistry of (μ2-RC2H)Co2(CO)6 species (R=H or C6H5), important intermediates in the Pauson-Khand reaction

The photochemistry of (μ2-RC2H)Co2(CO)6 (R=H or C6H5) has been investigated by both time-resolved and steady-state techniques. Pulsed excitation in cyclohexane solution with λexc

Preparation of alkynepentacarbonyltriphenylphosphinedicobalt complexes using ultra violet light

The preparation of alkynepentacarbonyltriphenylphosphinedicobalt complexes under mild conditions using linearly polarised ultra violet laser light is described. This method compares favourably with conventional thermal techniques and is superior when the

Mild and efficient preparation of alkynepentacarbonyldicobalt complexes containing the chiral (R) -(+) -Glyphos ligand

A range of diastereomeric alkynepentacarbonyldicobalt complexes containing the (R)-(+)-Glyphos ligand have been prepared in moderate to good yields under standard thermal conditions. Additionally, novel tertiary amine N-oxide mediated reactions have been developed which allow the synthesis of the same range of complexes at room temperature with good selectivity in consistently high yields. Optically pure (R)-(+)-Glyphos containing complexes have been obtained by preparative HPLC separation of the sets of diastereomeric compounds. Finally, the amine N-oxide techniques allow the rapid and clean preparation of alkynepentacarbonyltriphenylphosphinedicobalt complexes in good to high yields at room temperature.

The effect of ultrasound and of phosphine and phosphine-oxides on the Khand reaction

Ultrasonic irradation allows the Khand reaction to be conducted rapidly at low temperatures.Addition of phosphine oxides to the reaction mixture significantly increases yields in most cases.

Paramagnetic Organometallic Molecules. 13. Electron-Transfer-Catalyzed Reactions of Polynuclear Metal Carbonyls: Reactions of R2C2Co2(CO)6

Polynuclear metal carbonyls are shown to be suitable substrates for rapid electron-transfer-catalyzed (ETC) reactions that offer a new convinient method for the synthesis of many carbonyl derivatives.The factors that influence the applicability and yields of these reactions are discussed and examples with a variety of nucleophiles and substrates given.The distinction between electron-induced nucleophilic substitution (EINS) and ETC reactions is emphasized.ETC reactions of R'RC2Co2(CO)6 with MeCN and other Lewis bases using both electrolytic and chemical reductants are described in detail, in particular those where R' = R = CF3.The yields of the new products (CF3)2C2Co2(CO)5L , (CF3)2C2Co2(CO)4L2 , and (CF3)2C2Co2(CO)3L3 are virtually quantitative, with reaction times no longer than 5 min.In most cases reaction is over in 1 min at 293 K.Yields from ETC reactions with other R'RC2Co2(CO)6 compounds are variable but can be correlated with the lifetime of the radicals anions.Spectroscopic data characterized the phosphite or phosphine ligand as having an axial conformation in R2C2Co2(CO)5L complexes, but the X-ray structure of (CF3)2C2Co2(CO)5(MeCN) shows that the MeCN is equatorial.Steric factors are believed to account for this.However, the MeCN ligand is very labile in solution, and the electrochemistry of the MeCN adduct is characterized by abnormal limiting currents at 293 K that are absent at lower temperatures.The compound (CF3)2C2Co2(CO)5(MeCN) crystallizes in the space group Pna21; a = 15.794 (5) Angstroem, b = 9.803 (3) Angstroem, c = 10.936 (4) Angstroem, Z = 4, V = 1693.4 Angstroem3.