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  • 1995-1999
  • 1980-1984  (13)
  • 1983  (13)
Material
Years
  • 1995-1999
  • 1980-1984  (13)
Year
  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Organometallics 2 (1983), S. 183-184 
    ISSN: 1520-6041
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Organometallics 2 (1983), S. 1048-1049 
    ISSN: 1520-6041
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 116 (1983), S. 2765-2774 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Direct Metal Exchange in Phosphinidene-Bridged FeCo2 ClustersThe reactions of the clusters RPFeCo2(CO)9 (1a, R = Me; 1b, R = t-Bu) with [CpNiCO]2 (2) yielded product mixtures which originate from metal exchange reactions as well as from cluster rearrangement and ligand exchange. The crystal structures of the resulting clusters (μ4-MeP)2-Fe2CoNiCp(CO)8 (4) and (μ3-t-BuP)FeCoNiCp(CO)6 (5) were determined.
    Notes: Die Umsetzung der Cluster RPFeCo2(CO)9 (1a, R = Me; 1b, R = t-Bu) mit [CpNiCO]2 (2) führte zu Produktgemischen, die sowohl aus Metallaustauschreaktionen als auch aus Cluster-Umlagerung und Ligandenübertragung resultieren. Von den dabei entstehende Clustern (μ4-MeP)2-Fe2CoNiCp(CO)8 (4) und (μ3-t-BuP)FeCoNiCp(CO)6 (5) wurden Kristallstrukturanalysen durchgeführt.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 116 (1983), S. 2748-2764 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Chid PFeCoM Clusters: Preparation by Metal Exchange and Investigation of the Optical ActivityThe clusters RPFeCo2(CO)9 (1, R = Me, t-Bu, Ph) react with the organometal dimethylarsenides Cp(CO)3M—AsMe2 (3, M = Mo, W) to form the substitution derivatives RPFeCo2(CO)8-AsMe2-M(CO)3Cp (4, M = Mo; 5, M = W) and the hetero clusters RPFeCoMCp(CO)8 (6, M = Mo; 7, M = W). With R = tert-butyl the tetranuclear clusters t-BuPFeCo2M(AsMe2)Cp(CO)8 (8, M = Mo, W) are isolated as reaction intermediates. From t-BuPCo3(CO)9 (2) and Cp(CO)3Mo-AsMe2 the cluster t-BuPCo2Mo(AsMe2)Cp(CO)6 (9) is formed. The structures of the molybdenum containing clusters 6a and 9 were determined. The compound MePFeCoWCp(CO)8 (7a) is separated into its enantiomers via substitution with the phosphane ligand (-)-menthyl-O—PPh2. The ORD data of these show little resemblance with those of the corresponding sulfurbridged clusters.
    Notes: Die Cluster RPFeCo2(CO)9 (1, R = Me, t-Bu, Ph) setzen sich mit den Organometall-dimethyl-arseniden Cp(CO)3M—AsMe2(3, M = Mo, W) zu den Substitutions-Derivaten RPFeCo2(CO)8-AsMe2 - M(CO)3Cp (4, M = Mo; 4, M = Mo; 5, M = W) und zu den Hetero-Clustern RPFeCoMCp(CO)8 (6, M = Mo; 7, M = W) um. Für R = tert-Butyl können dabei als Zwischenstufen die Vierkerncluster t-BuPFeCo2M(AsMe2)Cp(CO)8(8, M = Mo, W) isoliert werden. Aus t-BuPCo3(CO)9(2) entsteht mit Cp(CO)3Mo-AsMe2 der Cluster t-BuPCo2Mo(AsMe2)Cp(CO)6 (9). Von den molybdänhaltigen Clustern 6a und 9 wurden die Strukturen bestimmt. Die Verbindung MePFeCoWCp(CO)8 (7a) läßt sich mit dem Phosphanliganden (-)-Menthyl-O—PPh2 in die Enantiomeren zerlegen. Deren ORD-Daten zeigen wenig Verwandtschaft mit denen der entsprechenden schwefelverbrückten Cluster.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 116 (1983), S. 2322-2336 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cluster Construction: Stepwise Formation of μ3PR Trimetal Clusters via P-Hal CompoundsStarting from MePCl2 the iron complexes (CO)4Fe - PMe(NMe2)2) (1), (CO)4Fe - PMe-(NMe2)Cl (2), (CO)4Fe - PMe(NMe2)H (3) and (CO)4Fe - PMe(H)Cl (4) are accessible. Of these the PCl compounds 2 and 4 with carbonyl metalates yield the metal-metal bonded functional dinuclear complexes (μ-PMeNMe2)FeCo(CO)7 (5), (μ-PMeH)FeCo(CO)7 (6a), (μ-PMeH)FeMn(CO)8 (7) and (μ-PMeH)Fe2(CO)6NO (8).In the dinuclear complexes (μ-PRH)FeCo(CO)7 (6, R=;Me, tBu) CCl4 CBr4 effect H/Hal exchange with formation of (μ-PRHal)FeCo(CO)7 (9, Hal=;Cl; 10, Hal=;Br). Subsequent reaction with carbonyl metalates leads to the trinuclear complexes FeCo(CO)7-(μ-RP)-M′ (11, M′=;Mn(CO)5; 12, M′=;FeCp(CO)2)) and/or to the mixed metal clusters (μ-RP)FeCo(CO)6(13, M=;Mn(CO)4; 14, M=;FeCp(CO); 15, M =CrCp(CO)2; 16, M=;WCp(CO)2). Crystal structure determinations were undertaken for the clusters 13b and 14b.
    Notes: Ausgehend von MePCl2 sind die Eisenkomplexe (CO)4Fe - PMe(NMe2)2) (1), (CO)4Fe - PMe-(NMe2)Cl (2), (CO)4Fe - PMe(NMe2)H (3) und (CO)4Fe - PMe(H)Cl (4) zugänglich. Von diesen liefern die PCl-Verbindungen 2 und 4 mit Carbonylmetallaten die Metall-Metall-verknüpften funktionellen Zweikernkomplexe (μ-PMeNMe2)FeCo(CO)7 (5), (μ-PMeH)FeCo(CO)7 (6a), (μ-PMeH)FeMn(CO)8 (7) und (μ-PMeH)Fe2(CO)6NO (8). In den Zweikernkomplexen (μ-PRH)FeCo(CO)7 (6, R=;Me. tBu) tritt mit CCl4 oder CBr4 H/Hal-Austausch zu (μ-PRHal)FeCo(CO)7 (9, Hal=;Cl; 10, Hal=;Br) ein. Anschließende Umsetzung mit Carbonylmetallaten liefert die Dreikernkomplexe FeCo(CO)7-(μ-RP)-M′ (11, M′=;Mn(CO)5; 12, M′=;FeCp(CO)2)) und/oder die Hetero-Cluster (μ-RP)FeCo(CO)6(13, M=;Mn(CO)4; 14, M=;FeCp(CO); 15, M =CrCp(CO)2; 16, M=;WCp(CO)2). Von den Cluster 13b und 14b wurden Kristallstrukturbestimmungen durchgeführt.
    Additional Material: 2 Ill.
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 116 (1983), S. 2311-2321 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cluster Construction: Stepwise Formation of μ3-RP Trimetal Clusters via P-H CompoundsThe easily accessible complexes RPH2 · Fe(CO)4 (1, R=;Me, tBu, Ph) contain two functional P - H units which can be reacted successively with metal carbonyls. With Co2(CO)8 or (η-C3H5)Co(CO)3 they yield intermediately the dinuclear complexes (μ-RPH)Fe(Co(CO)7 (2). These react with cobalt carbonyls to give (μ3-RP)FeCo2(CO)9 (3, R=;Me, tBu, Ph), with Fe3(CO)12 to give (μ-MeP)Fe2Co(CO)9H (7a) and with Ru3(CO)12 to form (μ-MeP)FeRuCo(CO)9H 8. Byproducts of these reactions are inter alia the complex (μ-tBuPH)2FeCo2(CO)8 (5) and the new hydrido clusters (μ3-tBuP)Fe2Co(CO)9H (7b) and (μ3-MeP)Ru2Co(CO)9H (9). The way to 8 represents the first successful stepwise synthesis of a chiral tetrahedrane framework. Also chiral are the substitution products (μ3RP)FeCo2(CO)8PMe2Ph (10, R=;Me, tBu, ph), which are produced together with the disubstituted meso compounds(μ3-RP)FeCo2(CO)7(PMe2Ph)2 (11, R=;Me, tBu, Ph).
    Notes: Die leicht zugänglichen Komplexe RPH2 · Fe(CO)4 (1, R=;Me, tBu, Ph) besitzen zwei funktionelle P - H-Einheiten, die nacheinander mit Metallcarbonylen zur Reaktion gebracht werden können. Mit Co2(CO)8 bzw. (nC3H5)Co(CO)3 liefern sie intermediär die Zweikernkomplexe (μ-RPH)Fe(Co(CO)7 (2). Diese reagieren mit Cobaltcarbonylverbindungen zu (μ3-RP)FeCo2(CO)9 (3, R=;Me, tBu, Ph), mit Fe3(CO)12 zu (μ-MeP)Fe2Co(CO)9H (7a) und mit Ru3 (CO)12 zu (μ3-MeP)FeRuCo(CO)9H (8. Als Nebenprodukte bei diesen Reaktionen fallen u. a. der Komplex (μ-tBuPH)2FeCo2(CO)8 (5) und die neuen Hydrido-Cluster (μ3-tBuP)Fe2Co(CO)2Co(CO)9H (7b) und (μ3-MeP)Ru2Co(CO)9H (9) an. In 8 ist erstmalig der schrittweise Aufbau eines chiralen Tetrahedrangerüsts gelungen. Chiral sind auch die Substitutionsprodukte (μ3RP)FeCo2(CO)8PMe2Ph (10, R=;Me, tBu, ph), die zusammen mit den disubstituierten meso-Verbindungen (μ3-RP)-Fe Co2(CO)7(PMe2Ph)2 (11, R=;Me, tBu, Ph) entstehen.
    Additional Material: 3 Tab.
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 116 (1983), S. 1219-1239 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cluster Construction: Formation of Phosphinidene Bridged Iron and Cobalt Clusters from Fe2(CO)6(PHR)2The PH functional dinuclear complexes Fe2(CO)6(PHR)2 (1, R = Me, t-Bu, Ph, p-Tol) contain the (CO)3Fe and PHR units in such an arrangement as to make possible the attachment of further carbonylmetal units with formation of phosphinidene bridged clusters. Accordingly they react with Co2(CO)8 to form Fe2Co(CO)9(μ2-PHR)(μ3-PR) (2, R = Me, Ph) and Fe2Co2(CO)11(μ4-PR)2 (3, R = Me, Ph) of which the clusters 2 are not intermediates on the way to 3. From 1 and Fe3(CO)12, depending on the reaction conditions, Fe3(CO)9(μ3-PR)2 (4, R = Me, Ph, p-Tol), Fe4(CO)11(μ4-PR)2 (5, R = Me, t-Bu, Ph, p-Tol), and Fe4(CO)12(μ4-PR)2 (6, R = Me, t-Bu, Ph, p-Tol) are formed. The Fe4 clusters 5 are also formed from Fe3(CO)12 and the Fe3 clusters 4. Conversely the clusters 5 yield the clusters 4 by thermal degradation, whereby also the P—t-Bu compound 4 becomes accessible. The saturated Fe4 clusters 6 and the unsaturated Fe4 clusters 5 can be converted into one another in vacuum and by addition of CO, respectively. The structures of one compound each of the Fe2Co clusters 2, the Fe2Co2 clusters 3 (two isomers), and the Fe4 clusters 5 were determined crystallographically.
    Notes: Die PH-funktionellen Zweikernkomplexe Fe2(CO)6(PHR)2 (1, R = Me, t-Bu, Ph, p-Tol) enthalten die (CO)3Fe- und PHR-Einheiten in einer Anordnung, die den Anbau weiterer Carbonyl-metall-Einheiten unter Bildung Phosphiniden-verbrückter Cluster möglich erscheinen lassen. Sie reagieren demgemäß mit Co2(CO)8 Zu Fe2Co(CO)9(μ3-PHR)(μ3-PR) (2, R = Me, Ph) und Fe2Co2(CO)11(μ4-PR)2 (3, R = Me, Ph), wobei die Cluster 2 keine Zwischenstufen auf dem Wege zu 3 sind. Aus 1 und Fe3(CO)12 entstehen je nach den Bedingungen Fe3(CO)9(μ3-PR)2 (4, R = Me, Ph, p-Tol), Fe4(CO)11(μ4-PR)2 (5, R = Me, t-Bu, Ph, p-Tol) und Fe4(CO)12(μ4-PR)2 (6, R = Me, t-Bu, Ph, p-Tol). Die Fe4-Cluster 5 bilden sich auch aus Fe3(CO)12 und den Fe3-Clustern 4. Umgekehrt liefern die Cluster 5 durch thermischen Abbau die Cluster 4, wodurch auch die P—t-Bu-Verbindung 4 zugänglich wird. Die gesättigten Fe4-Cluster 6 und die ungesättigten Fe4-Cluster 5 sind im Vakuum bzw. durch CO-Zugabe leicht ineinander zu überführen. Von je einem Vertreter der Fe2Co-Cluster 2, der Fe2Co2-Cluster 3 (2 Isomere) und der Fe4-Cluster 5 wurde kristallographisch die Struktur bestimmt.
    Additional Material: 4 Ill.
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 116 (1983), S. 3774-3793 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cluster Construction: Synthesis of Tetranuclear Clusters via AggregationTrinuclear clusters with EM3 frameworks (1-3, EM3 = SFeCo2, SRuCo2, PFeCo2, CCo3) can be connected via CO substitution with AsM′ units (M′ = Cr, Mo, W). The EM3-AsM′ intermediates 7-10 eliminate CO under appropriate conditions to form clusters 13-16 with tetrahedral M3M′ frameworks which bear ų3-E and ų2-AsMe2 ligands. The combinations M3M′ = FeCo2Mo, FeCo2W, RuCo2Mo, RuCo2W, Co3Mo, and Co3W were realized. Starting from trinuclear clusters 4, 5 with the chiral frameworks EM3 = SFeCoMo, SFeCoW, SRuCoMo, and SRuCoW by the same procedure via 11, 12 tetranuclear clusters 17, 18 with the frameworks M3M′ = FeCoMo2, FeCoW2, FeCoMoW, RuCoMo2, RuCoW2, and RuCoMoW are obtained. Among these are the first two clusters with four different metal atoms. The crystal structures of FeCo2MoS(AsMe2)Cp(CO)8 (13a), RuCo2MoS(AsMe2)Cp(CO)8 (14a), and FeCoMoWS-(AsMe2)Cp2(CO)7 (17b) were determined. The tetranuclear clusters show ligand fluxionality as shown by dynamic 1H NMR spectroscopy.
    Notes: An Dreikerncluster mit EM3-Gerüst (1-3, EM3 = SFeCo2, SRuCo2, PFeCo2, CCo3) lassen sich durch CO-Substitution AsM′-Einheiten (M′ = Cr, Mo, W) anbinden. Die EM3-AsM′-Zwischenstufen 7-10 spalten unter geeigneten Bedingungen CO ab, wobei Cluster 13-16 mit tetraedrischem M3M′-Gerüst entstehen, welches ų3-E- und ų-AsMe2-Liganden trägt. Es wurden die Kombinationen M3M′ = FeCo2Mo, FeCo2W, RuCo2Mo, RuCo2W, Co3Mo und Co3W verwirklicht. Ausgehend von Dreikernclustern 4, 5 mit den chiralen Gerüsten EM3 = SFeCoMo, SFeCoW, SRuCoMo und SRuCoW entstehen auf die gleiche Weise über 11, 12 Vierkerncluster 17, 18 mit den Gerüsten M3M′ = FeCoMo2, FeCoW2, FeCoMoW, RuCoMo2, RuCoW2, und RuCoMoW. Unter diesen sind die beiden ersten Cluster mit vier verschiedenen Metallatomen. Von FeCo2MoS(AsMe2)Cp(CO)8 (13a), RuCo2MoS(AsMe2)Cp(CO)8 (14a) und FeCoMoWS-(AsMe2)Cp2(CO)7 (17b) wurden die Kristallstrukturen bestimmt. Die Vierkerncluster zeigen eine Ligandenfluktuation, die durch dynamische 1H-NMR-Spektroskopie zu erfassen ist.
    Additional Material: 6 Ill.
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  • 9
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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