Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Azoalkan- und Nitren-verbrückte Carbonylmetall-Cluster des Eisens und Rutheniums (1991)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 2697-2704 
    Details
    ISSN: 0009-2940
    Keywords: Clusters, trinuclear and tetranuclear ; Iron clusters ; Ruthenium clusters ; Azoalkane and nitrene bridging ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Azoalkane- und Nitrene-Bridged Carbonyl Metal Clusters of Iron and RutheniumBy using cluster buildup reactions, the new azoalkane-bridged clusters Ru3(CO)9(RN=NR) (3a, R=Me, 3b, R=Et), Fe2Ru(CO)9(EtN=NEt) (4), Ru4(CO)12(RN=NR) (5a, R=Me, 5b, R=Et), and FeRu3(CO)12(EtN=NEt) (6) were obtained. Upon attempts to prepare further such compounds, the N-N bond was cleaved resulting in nitrene-bridged clusters including the new compound Fe4(CO)11(μ4-NEt)2 (9). Cluster buildup starting from Ru3(CO)9(μ3-NPh)2 resulted in Ru4(CO)11(μ4-NPh)2 (10) and FeRu3(CO)11(μ4-NPh)2 (11). The crystal structures of 5b and 9 as well as some reactions of the nitrene-bridged clusters are described.
    Additional Material: 8 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19911241210
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Derivatchemie des Clusters Ru4(CO)12(μ4-η2-N2Et2) (1993)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 126 (1993), S. 2023-2026 
    Details
    ISSN: 0009-2940
    Keywords: Ruthenium clusters ; Azoalkane ligands ; Hydrogenation ; Oxidation and reduction ; Alkyne addition ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Derivative Chemistry of the Cluster Ru4(CO)12(μ4η2-N2Et2)The title compound (1) can be converted into H2Ru4CO)11(μ4-η2-N2Et2) (2) in three ways: a) by direct hydrogenation, b) by a H - /H+ sequence, c) by reduction with Na/Hg (reversible with FeCp2+/CO) and subsequent protonation. The structure of 2 has been determined by an X-ray analysis. 2 is a dibasic acid and shows ligand fluxionality as demonstrated by NMR. 2 adds phenylacetylene either by insertion into one Ru - H bond or by H2 replacement yielding HRu4(CO)10(μ4-N2Et2)(μ-CPh≡CH2) (3) or Ru4(CO11(μ4-N2Et2)(μ4-HCCPh) (4).
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19931260909
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Umwandlungen zwischen Ru3-fixierten Azoalkan- und Dialkylhydrazin-Baueinheiten (1993)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 126 (1993), S. 2011-2016 
    Details
    ISSN: 0009-2940
    Keywords: Ruthenium clusters ; Azoalkane ligands ; Hydrazine-derived ligands ; Interconversions ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Interconversions Between Ru3-Bound Azoalkane and Dialkylhydrazine-Derived Building UnitsReactions involving hydrogen transfer have been investigated starting from the azoalkane-bridged clusters Ru3(CO)9-(RCH2N≡NCH2R) (1a, R = H; 1b, R = Me). In boiling toluene they are isomerized to the hydrazonide-bridged clusters HRu3(CO)9(RCH2N - N≡CHR) (2a, R = H; 2b, R = Me). Pd/C-catalyzed hydrogenation converts both compound types into the hydrazide-bridged clusters HRu3(CO)9(RCH2N - NHCH2R) (3a, R = H; 3b, R = Me). Hydride attachment to 1 and 2 and deprotonation of 3 yield a common anionic intermediate 4 which is converted into 3 upon protonation. While deuteration experiments and NMR spectra indicate that the anionic intermediate equilibrates between the N - H and Ru - H isomers, aurations of deprotonated clusters with Ph3PAuCl yield the Ru - Au-connected clusters Ph3PAuRu3(CO)9(EtN - N≡CHMe) (5) and Ph3PAuRu3(CO)9(MeN - NHMe) (6). The reversible cluster expansion of 2b with Fe(CO)3 fragments which results in the formation of FeRu3(CO)12(μ4-η2-N2Et2) (7) involves a reversible reconversion of the hydrazonide ligand to the azoalkane ligand.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19931260907
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Reaktionen der Hydrazid-verbrückten Cluster HRu3(CO)9(RN - NR2) mit Alkinen (1993)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 126 (1993), S. 2017-2022 
    Details
    ISSN: 0009-2940
    Keywords: Hydrazide ligands ; Vinyl ligands ; Alkyne insertions ; Ruthenium clusters ; Structure determinations ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reactions of the Hydrazide-Bridged Clusters HRu3(CO)9(RN - NR2) with AlkynesThe clusters HRu3(CO)9(RN - NR2) (1) with triply bridging hydrazide ligands (RN - NR2 = MeN - NHMe, HN - NHMe, HN - NMe2) undergo reactions with the alkynes HCCPh and PhCCPh to yield three cluster products in each case. One of them (2) is presumed to result from Ru - H insertion with concomitant cluster opening. The second (3) contains an open Ru3 cluster bridged by a unique μ3-η2-vinyl ligand, as shown by a structure determination. The third (4) represents the expected simple reaction product with a s̰,-bound vinyl ligand, again proved by a structure determination. Cluster type 3 is converted to cluster type 2 by CO addition.
    Additional Material: 6 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19931260908
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...