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  • 1
    Electronic Resource
    Electronic Resource
    Indirect two-dimensional heteronuclear NMR spectroscopy. Phosphorus-31 and iron-57 spectra of organoiron complexes (1988)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 110 (1988), S. 5661-5668 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00225a012
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  • 2
    Electronic Resource
    Electronic Resource
    Organylkomplexe von (η5-Cyclopentadienyl)(triorganophosphan)eisen (1987)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 120 (1987), S. 1987-2002 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Organyl Complexes of (η-Cyclopentadienyl)(triorganophosphane)ironA series of organyliron complexes of the type Cp(L)2Fe—R (Cp = C5H5, C5H4Me, C5Me5; L = PhnMe3-nP, n = 0-3) (R = Me, Et, Bu, Ph, CH2CH2Ph, CH=CH2) have been prepared either from the corresponding iron chlorides (1-7) and organomagnesium compounds or from Cp(COD)FeLi (8, 9), organic halide, and phosphane. The thermal stability of the ethyliron complexes 17-24 towards β-H elimination (to give the (η2-ethylene)iron hydrides 37-39 or the Cp(L)2FeH compounds 40-48) increases with the basicity of the phosphane ligand and decreases with increasing methyl-substitution of the Cp ligand. The vinyliron compounds 29-32, 54 and 55 react with ethylene with insertion into the vinyl-Fe bond to give the (η3-crotyl)iron complexes 56-61 as the result of isomerization. The (η1, η2-alkenyl)iron compounds Cp(Me3P)Fe-[CH2]3-CH=CH2(Cp=C5H5 (62), C5Me5 (63) and (C5Me5)(Me3P)Fe-o-C6H4CH2CH=CH2 (67) were isolated and are stable at 20°C.
    Notes: Es wurde eine Reihe von Organyleisen-Komplexen des Types Cp(L)2Fe—R (Cp = C5H5, C5H4Me, C5Me5; L = PhnMe3-nP, n = 0-3) (R = Me, Et, Bu, Ph, CH2CH2Ph, CH=CH2) teilweise über die entsprechenden Eisenchloride (1-7) und Organomagnesium-Verbindungen, zum anderen Teil aus Cp(COD)FeLi (8, 9), Organohalogenid und Phosphan dargestellt. Die thermische Stabilität der Ethyleisen-Komplexe 17-24 gegenüber ß-H-Eliminierung zu den (η2-Ethylen)eisenhydriden 37-39 bzw. den Verbindungen Cp(L)2FeH (40-48) nimmt mit der Basizität des Phosphanliganden zu, jedoch mit zunehmender Methylsubstitution am Cp-Liganden ab. Die Vinyleisenverbindugen 29-32, 54, 55 reagieren mit Ethylen unter Insertion in die Vinyl-Fe-Bindung. Nach Isomerisierung entstehen die (η3-Crotyl)eisen-Komplexe 56-61. Als bei 20°C stabile (η1, η2-Alkenyl)eisen-Verbindungen wurden Cp(Me3P)Fe-[CH2]3-CH =CH2(Cp=C5H5 (62), C5Me5 (63) und (c5Me5)(ME3P)Fe-oC6H4CH2=CH2 (67) isoliert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19871201210
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  • 3
    Electronic Resource
    Electronic Resource
    Verschiedenartige Koordinationen bei η2-Alken)-(η5-cyclopentadienyl)organylnickel(II)-Komplexen (1991)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 441-452 
    Details
    ISSN: 0009-2940
    Keywords: (η2-Alkene)(η5-cyclopentadienyl)organylnickel(II) complexes, stability and reactivity of ; Cyclopentadienyl ligands, substituted ; Chelating alkenylcyclopentadienyl ; Nickel complexes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Various Coordinations in (η2-Alkene)(η5-cyclopentadienyl)organylnickel(II) ComplexesA series of (η2-alkene)(η5-cyclopentadienyl)organylnickel(II) complexes with substituted cyclopentadienyl ligands is synthesized in order to compare the structures, the thermal stabilities, and chemical reactivities. In (allyl)(η5-Cp')Ni compounds the allyl moiety is η3-coordinated when Cp'=C5H5, C5Me5 (1), C5Ph5 (2), indenyl (3), [Hydridotri(pyrazolyl)borato] (4) (as an equivalent of the cyclopentadienyl ligand), and [C5H4((CH2)3CH=CH2)] (22). It is found that the [(η2-alkene)alkyl(η5-Cp')nickel] compounds [Cp'=C5Me5; alkene=C2H4, alkyl=Me (10), Et (9) or alkene=(1 - 2-η2)-1,3-butadiene, alkyl=Me (11); Cp'=C5Ph5; alkene=C2H4, alkyl=Me (12)] are thermally more stable and less reactive than their η5;- C5H5 analogues; the largest increase in thermal stability is observed when the η5-Cp' and the η2-alkene functions are connected by substitution of the cyclopentadienyl ligand with an alkenyl group of suitable chain length. In the case of compounds of the general type [(η5-C5R4((CH2)nCH=CH2))-(ligand)Ni(II)] with Ph3P as the ligand these complexes are cationic [R=H, n=3 (14+) or R=Me, n=2 (17+)]. On the other hand, the compounds with anionic ligands are neutral complexes (R=H, n=3, ligand=methyl (19), ethyl (20), isopropyl (21) or R=Me, n=3 and ligand=iodide (24), bromide (25), methyl (26), ethyl (27)]. In 14+, 17+, 19 - 21 and 24 - 27 the C=C bond of the alkenyl group is η2-coordinated to the nickel atom. X-ray structures have been determined for 4 and 25.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19911240306
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  • 4
    Electronic Resource
    Electronic Resource
    Organyleisen-Komplexe des Typs Cp(Ph2P[CH2]nPPh2)Fe—R (1985)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 118 (1985), S. 2407-2417 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Organyliron Complexes of the Type Cp(Ph2P[CH2]nPPh2)Fe — RThe preparation of the (η5-cyclopentadienyl)bis(triorganophosphane)iron halide complexes 6 - 10 involving Me3P, Me2PhP, MePh2P, (Ph2PCH2)2, and (Ph2PCH2CH2)2 is described. Reaction with organomagnesium halides RMgHal leads in the case of 9 (Ligand = (Ph2PCH2)2 to complexes 13 - 19 of the type Cp()Fe — R (R = Me, Et, Bu, i-Bu, cyclopropyl, vinyl, 2-butenyl) and in the case of 10 ( = (Ph2PCH2CH2)2) to 21 (R = Bu). The hydridoiron complexes 12 and 20 are formed as side products in cases where the group R contains β-H-atoms and are the sole product where R = i-Pr or t-Bu. Thermolysis of the organoiron complexes 14 - 16 as well as 19 and 21 between 50 and 100°C also leads to 12 or 20. The Fe-β-H-elimination is reversible in the case of the (2-butenyl)iron complex 19.
    Notes: Die Darstellung der (η5-Cyclopentadienyl)bis(triorganophosphan)eisenhalogenide 6 - 10 für Me3P, Me2PhP, MePh2P, (Ph2PCH2)2 und (Ph2PCH2CH2)2 wird beschrieben. Anschließende Umsetzung mit Organomagnesiumhalogeniden RMgHal führt bei 9 (Ligand = (Ph2PCH2)2) zu den Komplexen 13 - 19 des Typs Cp()Fe — R (R = Me, Et, Bu, i-Bu, Cyclopropyl, Vinyl, 2-Butenyl) und bei 10 ( = (Ph2PCH2CH2)2) zu 21 (R = Bu). Bei β-H-Atome enthaltendem R entstehen als Nebenprodukte die Hydridoeisen-Komplexe 12 bzw. 20, die sich mit R = i-Pr oder t-Bu ausschließlich bilden. Thermolyse der Organoeisen-Komplexe 14 - 16 und 19 bzw. 21 zwischen 50 und 100°C,führt ebenfalls zu 12 bzw. 20. Beim (2-Butenyl)eisen-Komplex 19 ist die Fe-β-H-Eliminierung reversibel.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19851180620
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