57574-48-8

Upstream product

• 101-02-0 triphenyl phosphite 
• 21118-36-5 hexacarbonyl-bis-(triphenoxyphosphine) dicobalt 
• 15226-74-1 dicobalt octacarbonyl 
• 68-12-2 N,N-dimethyl-formamide 

Downstream Products

• 55449-52-0 Co₂(CO)6[P(OPh)3]2 
• 28713-43-1 {Co(CO)2(P(OCH₂)3CC₂H₅)3}⁽¹⁺⁾*{Co(CO)4}^(1-)={Co(CO)2(P(OCH₂)3CC₂H₅)3}{Co(CO)4} 
• 80907-44-4 BrHgCo(P(OC₆H₅)3)2(CO)2 
• 80907-43-3 ClHgCo(P(OC₆H₅)3)2(CO)2 
• 21118-36-5 hexacarbonyl-bis-(triphenoxyphosphine) dicobalt 

Relevant academic research and scientific papers

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.