Diene-Iron Carbonyl Complexes

Catenated Organic Compounds of the Group IV Elements, 4,1 Conjugate Addition of Grignard Reagents to Aromatic Systems, 1, 221 Cyclobutadiene Metal Complexes, 4, 95 Cyclopentadienyl Metal Compounds, 2, 365 Diene-Iron Carbonyl Complexes, 1, 1... 

A review of diene-iron carbonyl complexes has recently appeared (5) metal complexes of di- and oligoolefinic ligands have also been reviewed (6). A general review of olefin, acetylenic, and 7r-allylic complexes of transition metals is due to Guy and Shaw (7). 

Diene-Iron Carbonyl Complexes and Related Species R. Pettit and G. F. Emerson Reactions of Organotin Hydrides with Organic Compounds Henry C. Kuivila Organic Substituted Cyclosilanes... 

Since the present [4 -i- 3] —> 7 reaction can be regarded as a concerted [47t -i- 2ir] cycloaddition, it is expected that dienes having high equilibrium concentrations of the s-cis conformer should serve as efficient acceptors of the reactive three-carbon unit. As expected, 1,2-dimethylenecyclohexane is recognized to be one of the most effective dienes. - It should be further noted that the use of diene-iron carbonyl complexes in place of the free dienes results in remarkable increases in the yields of cycloadducts, presumably owing to fixing the s-cis conformation within the diene. ... 

S R. Pettit and G. F. Emerson Advan. Organometal. Chem. 1, 1 (1964) Diene-iron carbonyl complexes and related species 46 (134) ... 

The recent excellent monograph by Fischer and Werner 100) contains a comprehensive coverage of diene-metal complexes up to 1965. Earlier reviews on this topic were published in 1962-1963 by Bennett 11), Guy and Shaw 113), Cais 24), and Fischer and Werner 99). Reviews dealing specifically with the chemistry of diene-iron carbonyl complexes have recently been prepared by Pettit et al. 191, 192). 

Diaza- 1,3-butadiene (a-Diimine) Ligands Their Coordination Modes and the Reactivity of Their Metal Complexes, 21, 152 Diene-Iron Carbonyl Complexes, 1, I... 

It has been reported that a diene iron carbonyl complex does not maintain its configuration upon the addition of hydrogen chloride, as evidenced by the different salts obtained from the reaction of butadieneiron tricarbonyl with HBF4 or HCl followed by AgBp4. Thus piperylene Fe(CO)3 reacts with HCl to give the syn-syn dimethyl allyl derivative [6-16]. 

Structural characterization of (butadiene)tricarbonyliron complexes has been carried out by microwave spectro-scopy/" " solution calorimetry/" pulsed-electron high pressure mass spectrometry/ infrared spectro-scopy/ and vibrational overtone spectroscopy/ Theoretical investigations using DFT have also been reported/ " Extended Hiickel calculations have been employed to study structure and stereodynamic relationships in a variety of ( 7" -diene)iron carbonyl complexes/ ... 

Diene-iron Carbonyl Complexes and Related Species... 

The olefin-iron carbonyl complexes were first introduced by two entirely different synthetic methods. In 1930 Reihlen and co-workers (I) obtained butadiene-iron tricarbonyl by a reaction of butadiene with iron penta-carbonyl and in 1953 Reppe and Vetter (2) reported organoiron compounds, since shown to be diene-iron carbonyl complexes, following reaction of acetylene with iron carbonyls. 

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