Triphenyl phosphite, iron complex

OPC,Hg, Trimethyl phosphite iron iron complex, 26 61 OPCfiH , Triethyl phosphite iron complex, 26 61 OPCmHis, Triphenyl phosphite iron complex, 26 61... 

POgCigHis, Triphenyl phosphite, iron complex, 26 61, 28 171 nickel complex, 28 101 ruthenium complex, 26 178 PO3C21H21, Tris(4-methylphenyl) phosphite, ruthenium complexes, 26 277, 278,... 

C1bHi5As, Arsine, triphenyl-iron complex, 26 61 C H 5OjP, Triphenyl phosphite ruthenium complex, 26 178 CuHijP, Phosphine, triphenyl-cobalt complex, 26 190—197 cobalt-gold-ruthenium, 26 327 gold complex, 26 90, 325, 326 gold-manganese complex, 26 229 iridium complexes, 26 117-120, 122-125, 201, 202... 

PO2WC2SH21, Tungsten, dicarbonyl(T) -cyclopentadienyl)hydrido(triphenyl-phosphine)-, 26 98, 28 7 PO3C3H, Trimethyl phosphite, cobalt and rhodium complexes, 28 283, 284 iron complexes, 26 61, 28 171, 29 158 nickel complex, 28 101 P03C,H,5, Triethyl phosphite, iron complexes, 26 61, 28 171, 29 159 nickel complexes, 28 101,104-106 P03C,H2, Isopropyl phosphite, nickel complex, 28 101... 

Cycloheptadienyl-iron complexes. Cyclohcptadienyl-Fe(CO), reacts with nucleophiles to give mixtures of products, usually in low yield. However, complexes 1, in which one CO ligand is replaced by triphenylphosphinc or triphenyl phosphite, react with most nucleophiles at the dienyl terminus and in high yield. Hydride abstraction followed by reaction with a second nucleophile results in a regio- and stereocontrol led substitution at the opposite terminus and again anti to the metal. Decomplexation affords ri.v-5,7-disub-stituted cycloheptadienes. 

Some insight into the mechanisms of the iodine-promoted carbonylation has been obtained by radioactive tracer techniques [17] and low-temperature NMR spectroscopy [18]. The mechanism involves the formation of HI, which in a series of reactions forms with rhodium a hydrido iodo complex which reacts with ethylene to give an ethyl complex. Carbonylation and reductive elimination yield propionic acid iodide. The acid itself is then obtained after hydrolysis. The rate of carboxylation was reported to be accelerated by the addition of minor amounts of iron, cobalt, or manganese iodide [19]. The rhodium catalyst can be stabilized by triphenyl phosphite [20]. However, it is doubtful whether the ligand itself would meet the requirements of an industrial-scale process. 

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