Tetracarbonyl triphenylphosphine iron

The solvent and excess pentacarbonyliron are removed under reduced pressure and the product is recrystallized from dichloromethane-hexane. Yield 3.56 g (83% based on consumed pentacarbonyliron). 

OTHER TETRACARBONYL(GROUP V DONOR LIGAND)IRON(0) COMPLEXES 

The general applicability of the reaction catalyzed by cobalt(II) halide is illustrated by the examples in Table I. An important feature of the catalyzed reaction is the ability to prepare Fe(CO)4L in high yield with little contamination by Fe(CO)3L,2. Typically the final reaction product contains 5% Fe(CO)3L2 except for L = P(OEt)3, where 10% Fe(CO)3[P(OEt)3]2 is produced. Excess Fe(CO)j is used in the reactions to ensure that Fe(CO)4L is 

TABLE II. Reaction Conditions for the Synthesis of the Complexes Fe(CO)4L [L = PPhj, AsPhj, SbPhj, PMePh2, PMe2Ph, PCy, Pfw-Bn), P(OEt 3, PfOMejj] Using [Fe( j -C5H5)(CO)2]2 and [FeCif -CjMejMCOIlj as Catalysts.  

The properties of the complexes Fe(CO) L [L = PPhj, AsPhj, SbPhj, PMePh2, PMcjPh, PCyj, P(r-Bu)3, P(OPh)3, P(OEt)3, and P(OMe)3] have been extensively studied and reviewed. The complexes are all air 

OTHER TETRACARBONYL (GROUP V DONOR LIGAND) IRON(O) COMPLEXES 

Gmelin, Handbuch der Anorganische Chemie, Eisen-Organische Verbindungen, Teil B, U. Kruerke (ed.), Springer Verlag, Berlin, 1978. 

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Ct04P3C34H32, Chromium, tetracarbonyl(tri-butylphosphine)(triphenylphosphine)-, irons-, 23 38... 

While attempting to prepare an T71-(vinylcarbene)iron complex121 by the alkylation or acylation of an a,/3-unsaturated acylferrate, Mitsudo and Wa-tanabe found122 that the major isolated product was in fact an -vinylketene complex (178), formed presumably by the carbonylation of an intermediate V-vinylcarbene, which may then undergo olefin coordination to the vacant metal site. All attempts to isolate such intermediates, or to observe them by 13C NMR spectroscopy, failed. Only in the reaction between potassium tetracarbonyl -cinnamoy ferrate (179.a) and pivaloyl chloride (180.b) was a side product (181) isolated in appreciable yield. In other reactions, only a trace (<1%) of such a compound was detected by spectroscopy. The bis(triphenylphosphine)iminium(l + ) (PPN) salts of 179.a and 179.b also reacted with 2 equiv of ethyl fluorosulfonate to give 178.g and 178.h in 21 and 37% yield, respectively. All products were somewhat unstable to silica gel, hence the low isolated yields in some cases. 

An iron tetracarbonyl complex (295) ° and a platinum bis(triphenylphosphine) complex of thiete 1,1-dioxide have been prepared. Platinum complexes of 3-phenyl- and 3-(p-bromophenyl) thiete 1,1-dioxide also have been prepared. No complex was obtained with the 3-t-butyl derivative. The pale-yellow, crystalline iron complex decomposes in refluxing hexane in the presence of excess sulfone to Fe2S2(CO)9, indicating a drastic structural rearrangement. Other carbon-containing fragments were not observed. The bis(triphenylarsine)platinum complex of 3-02-bromophenyl) thiete sulfone is decomposed photochemically to the thiete sulfone. The same result is achieved on treatment of the complex with tetra-cyanoethylene. ... 

P2FJ cMoO,C34H2 . Iron(l + ), p-acetyl-2-kC lKO-tetracarbonyl-lK C,2K-C-bis[ 1,2-(n -cyclopenladienyl)]-(triphenylphosphine-1 k P)molybdenum-hexaf1uorophosphate(l -), 26 241... 

Acyl carbonyl ferrates are involved as intermediates in two preparations of aldehydes. Alkyl bromides react with sodium tetracarbonyl ferrate(—ii) (from iron pentacarbonyl and sodium) by a process of oxidative addition to furnish the ferrate(—i) (124) this species rearranges on treatment with triphenylphosphine to a phosphonium-substituted acyl ferrate(—i) (125), which is subsequently cleaved by acetic acid to the homologous aldehyde, as outlined in Scheme 46. A related procedure employs reaction of an acid halide with sodium tetracarbonyl ferrate(—ii) to afford the acyl ferrate(—i) (126) directly this species is also cleaved by acetic acid, and affords yet another method for the reduction of acid halides to aldehydes. 

OjFjFeS2C9Hj, Iron(l +X dicarbonyl( f -cyclopentadienyl) (thiocarbonyl)-, tri-fluoTometbanesulfonate, 28 186 OjF6FeMoP2C34H28, Iron(l -h), /i-acetyl-2icC licO-tetracarbonyl-lK C,2ic C-bis[l, 2-(q -cyclopentadienyl) ] (triphenylphosphine-1 icP)molybdenum-, hexafluorophosphate(l —), 26 241 OjF4Fe2PC,oH,3, Iron(l +), /i-acetyl-C 0-bis[dicarbonyl(ij-cyclopentadienyl)-, hexafluorophosphate(l —X 26 235 OjHReC, Rhenium, pentacarbonylhy-drido-, 26 77... 

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