57574-46-6

Upstream product

• 101-02-0 triphenyl phosphite 
• 21118-36-5 hexacarbonyl-bis-(triphenoxyphosphine) dicobalt 
• 32138-74-2 Na[Co(CO)3P(OPh)3] 
• 15226-74-1 dicobalt octacarbonyl 
• 68-12-2 N,N-dimethyl-formamide 

Downstream Products

• 21118-36-5 hexacarbonyl-bis-(triphenoxyphosphine) dicobalt 
• 141229-58-5 ((C₂H₅)2N)3ZrCo(CO)3(P(OC₆H₅)3) 
• 141229-54-1 ((CH₃)2N)3TiCo(CO)3(P(OC₆H₅)3) 
• 141229-56-3 ((C₂H₅)2N)3TiCo(CO)3(P(OC₆H₅)3) 

Relevant academic research and scientific papers

Kinetic and Thermodynamic Acidity of Hydrido Transition-Metal Complexes. 3. Thermodynamic Acidity of Common Mononuclear Carbonyl Hydrides

The pKa values of the common mononuclear carbonyl hydrides have been determined in acetonitrile by IR measurement of the position of deprotonation equilibria with various nitrogen bases and potassium phenolate.The resulting values cover a range of about 20 pKa units, from 8.3 for HCo(CO)4 to 26.6 for CpW(CO)2(PMe3)H.Hydrides with η5-C5Me5 ligands are appreciably weaker acids than the corresponding hydrides with η5-C5H5 ligands (e.g., the pKa of (η5-C5Me5)Fe(CO)2H is 26.3, while that of (η5-C5H5)Fe(CO)2H is 19.4).The acidities of the group 8 carbonyl hydrides H2M(CO)4 decrease in the order Fe > Ru > Os.

Synthesis, crystal structure and hydroformylation activity of triphenylphosphite modified cobalt catalysts

The dinuclear complex [Co2(CO)6{P(OPh) 3}2] (2) has been synthesised and was fully characterised. The solid state structure revealed a trans diaxial geometry, no bridging carbonyls, and Co-Co and Co-P bond lengths of 2.6722(4) and 2.1224(4) A, respectively. Catalysed hydroformylation of 1-pentene with 2 was attempted at temperatures in the range 120 to 210°C and pressures between 34 and 80 bar. High pressure spectroscopy (HP-IR and HP-NMR) was used to detect hydride intermediates. High pressure infrared (HP-IR) studies revealed the formation of [HCo(CO)3P(OPh)3] (4) at ca. 110°C, but at higher temperatures absorption bands corresponding to [HCo(CO)4] (3) were observed. The hydride intermediate 4 has also been synthesised and characterised. Upon increased ligand concentration, HP-IR studies showed the formation of new carbonyl absorption bands due to a higher substituted cobalt carbonyl complex-[HCo(CO)2{P(OPh)3}2] (5), which is believed to be catalytically less active. Complex 5 has been synthesised independently and was fully characterised. A low temperature crystal structural study of 5 revealed a trigonal bipyramidal structure with a trans H-Co-CO arrangement and two equatorial phosphite ligands, the Co-P bond lengths being 2.1093(8) and 2.1076(8) A, respectively.