36870-06-1

Upstream product

• 17685-52-8 triiron dodecarbonyl 
• 607-01-2 ethyl-diphenyl-phosphane 
• 38720-11-5 COFe(P(C₆H₅)2C₂H₅)3H₂ 
• 201230-82-2 carbon monoxide 
• 12093-05-9 (cyclooctatetraene)tricarbonyliron 
• 16940-66-2 sodium tetrahydroborate 
• 13463-40-6 iron pentacarbonyl 
• 2155-96-6 Diphenylvinylphosphine 

Relevant academic research and scientific papers

A Facile, high-yield synthesis of trans-Fe(CO)3(PR3)2 from Fe(CO)5, Fe(CO)4CHO-, HFe(CO)4-, or HFe(CO)3PR3-

The reaction of Fe(CO)5 with PR3 and NaBH4 in refluxing n-butyl alcohol affords high yields of trans-Fe(CO)3(PR3)2. It has been shown that Fe(CO)4PR3, which does not appear in the collected product, is also not a significant intermediate in the reaction. The reaction proceeds by initial formation of H2 gas and Fe(CO)4CHO-. The formyl complex decomposes to HFe(CO)4- which reacts with PR3 to give the disubstituted product. The principal intermediate for this substitution is believed to be HFe(CO)3PR3-, although polynuclear species may also be important. The substitution of HFe(CO)4- by PR3 is favorable when the counterion is Na+ but not when it is PPN+. The overall reaction is very sensitive to choice of solvent; substitution of ethanol for n-butyl alcohol leads to greatly reduced yields.

Olefin replacement on cyclooctatetraeneiron tricarbonyl by neutral ligands

Kinetic data are reported on reactions of cyclooctatetraeneiron tricarbonyl with tertiary phosphines (L) and 1,2-bis(diphenylphosphino)ethane (L-L) in decalin at various temperatures. The reactions involve replacement of cyclooctatetraene leading to trans-Fe(CO)3L2 and cis-Fe(CO)3(L-L). Reaction rates depend on the nature and concentration of the entering ligand. Results are interpreted in terms of a mechanism consisting of a slow coordination of L on the substrate followed by fast elimination of cyclooctatetraene from the resulting labile intermediate. Activation parameters are discussed to support this mechanism.

Some tertiary phosphine-iron carbonyl compounds

Derivatives of iron pentacarbonyl containing 1,2-bis-(diphenylphosphino)-ethane are described, as well as related compounds containing halide and perfluoroalkyl groups. Stereoisomers of dichlorodicarbonyl-[1,2-bis-(diphenylphosphino)-ethane]-iron(II) have been observed. A modified synthesis of tertiary phosphine-iron carbonyl compounds is described.