Library

Language
Preferred search index
Number of Hits per Page
Default Sort Criterion
Default Sort Ordering
Size of Search History
Default Email Address
Default Export Format
Default Export Encoding
Facet list arrangement
Maximum number of values per filter
Auto Completion
Feed Format
Maximum Number of Items per Feed
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
    s.l. : American Chemical Society
    Journal of the American Chemical Society 94 (1972), S. 9272-9274 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 56 (2000), S. e352-e352 
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The synthesis, spectroscopic data and X-ray structural analysis of the title compound, C26H35NO2S, (I), are described. The crystal contains discrete molecules separated by normal van der Waals distances. The benzenesulfonamide derivative of the corresponding amine allows the assigment of its relative configuration. The secondary amine has been synthesized via a sequential multi-step hydroformylation procedure according to Eilbracht et al. [Chem. Rev. (1999), 99, 3329–3365].).
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 56 (2000), S. e356-e356 
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The title compound, C12H16O4, (I), was prepared by oxidation of (5S*,6R*)-1,7-dioxadispiro[4.0.4.4]tetradecane-2,8-diol using silver(I) carbonate and posesses a cis configuration of the two five-membered-ring lactones fused spiro to the six-membered carbocycle, which has a chair conformation. It represents an exceptional structure for bis-tetrahydrofuran units, which are interesting building blocks in natural products. The synthesis, spectroscopic data and X-ray structural analysis are described. The crystal contains discrete molecules separated by normal van der Waals distances.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 56 (2000), S. e215-e215 
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The title compound, C16H26O2, (I), prepared by oxidation of (1R*,11R*)-12-hydroxybicyclo[9.4.1]hexadecan-16-one using pyridinium dichromate, has a trans configuration of the two fused rings and represents an interesting precursor for the synthesis of macrocyclic structures.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 109 (1976), S. 3136-3141 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reaction of Spiro[2.4]hepta-4,6-diene with Tetracarbonylnickel. -A simple Access to the 1,1′- Bridged Nickelocene System.The reaction of Ni(CO)4 with spiro[2.4]hepta-4,6-diene (2) results in C—C bond fission and insertion of CO to form the ethylene-bridged σ-acyl-π-cyclopentadienyl complex 5. In addition the dinuclear nickel compound 6 containing a 3-oxapentamethylene bridge between its two cyclopentadienyl ligands can be isolated. Treatment with triphenylphosphine transforms the complex 6 to the 1,1′-bridged nickelocene 7, the first „[n]nickelocenophane“.
    Notes: Spiro[2.4]hepta-4-6-dien (2) reagiert mit Ni(CO)4 unter C—C-Bindungsspaltung und CO-Insertion und bildet den σ-Acyl-π-cyclopentadienylnickel-Komplex 5 mit Verknüpfung beider Liganden durch eine Äthanobrücke. Weiterhin lässt sich der zweikernige Nickelkomplex 6isolieren, dessen Cyclopentadienyl-Liganden durch eine 3- Oxopentamethylen-Einheit miteinander verbunden sind. Der Komplex 6 wandelt sich unter dem Einfluß von Triphenylphosphin in das 1,1′-überbrückte Nickelocen 7, das erste „[n]Nickelocenophan“ um.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 106 (1973), S. 2268-2276 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Crystal and Molecular Structure of 2,2a,3,4-Tetrahydro-1H-cyclopent[cd]indene-1-carb-oxylic AcidThe structure of 2,2a,3,4-tetrahydro-1H-cyclopent[cd]indene-1-carboxylic acid (1b) has been determined from single-crystal X-ray diffraction data. The crystals are monoclinic, space group C 2/c (a = 29.76, b = 4.57, c = 15.13 Å, β - 108.5°, Z -8). The structure was determined by direct methods and refined to R = 0.066. The structure found is compared with the structure computed by a combined π-SCF-LCAO-MO and force field method. The phenyl-ring is slightly bent and shows deviations of the bond lengths due to the strain of the molecule.
    Notes: Die Struktur von 2,2a,3,4-Tetrahydro-1H-cyclopent[cd]inden-1-carbonsäure (1b) wurde röntgenographisch bestimmt. Die Kristalle sind monoklin, Raumgruppe C2/c (a = 29.76,b = 4.57, c = 15.13 Å, β = 108.5°, Z = 8). Die Struktur wurde durch direkte Methoden aufgeklärt und bis zu einem R-Faktor von 0.066 verfeinert. Die gefundene Struktur wird verglichen mit einer Struktur, die mit einer kombinierten π-SCF-LCAO-MO- und Kraftfeld-Methode berechnet wurde. Der Benzolring ist leicht geknickt und zeigt durch Spannung leicht veränderte Bindungslängen.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 109 (1976), S. 1429-1435 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Formation of Bridged σ-Alkyl-π-Cyclopentadienyl Complexes from Spirocyclopentadienes. Alkyl Migration from Ligand to MetalSpiro[4.4]nona-1,3-diene (4) reacts with Fe2(CO)9 as well as with Mo(CO)3L3 (L3 = diglyme) By C—C bond fission and alkyl migration to form the noval alkylene-bridged σ-alkyl-π-cyclopentadienyl complexes 7 and 9 of the corresponding metals. Spiro[2.4]hepta-4,6-diene (5) and Fe2(CO)9 form the bridged acyl complex 13 by CO-insertion, Whereas the reactive molybdenum complexes Mo(CO)3L3 and 5 yield the strained alkyl compound 15. The examples of alkyl migration from ligand to metal suggest a general type of transformation of cyclopentadiene organo transition metal complexes.
    Notes: Spiro[4.4]nona-1,3-dien (4) reagiert mit Fe2(CO)9 sowie mit Mo(CO)4L3 (L3 = Diäthylenglycol-dimethyläther (Diglyme)) unter C—C-Bindungsspaltung und Wanderung einer Alkylgruppe zu den neuartigen alkylenüberbrückten σ-Alkyl-π-cyclopentadienyl-Komplexen 7 und 9 der entsprechenden Metalle. Während Spiro[2.4]hepta-4,6-dien (5) mit Enneacarbonyldieisen unter CO-Insertion den überbrückten Acylkomplex 13 bildet, gewinnt man mit den reaktiven Molybdän-komplexen Mo(CO)3L3 den gespannten Alkylkomplex 15. Die vorgestellten Beispiele der Alkylwanderung vom Liganden zum Metall lassen auf einen allgemeinen Reaktionstyp für die Umwandlung übergangsmetallorganischer Cyclopentadienverbindungen schließen.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 118 (1985), S. 1983-1995 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Selective Reduction of Cyclohexadienones with Fe2(CO)9 and waterSelective monohydrogenation of cross conjugated 2,5-cyclohexadien-1-ones 1 with Fe2(CO)9 and water forming under unusually mild conditions the cyclohexadienol complexes 2 is applied to various related compounds. The regioselectivity of this reaction is tested with differently substituted derivatives. A mechanism explaining the observed regioselectivities and the pH dependence of the stereochemistry is discussed.
    Notes: Die unter ungewöhnlich milden Bedingungen verlaufende selektive Monohydrierung gekreuzt konjugierter 2,5-Cyclohexadien-1-one 1 mit Fe2(CO)9 und Wasser zu den Cyclohexadienol-Komplexen 2 wird auf verschiedene verwandte Verbindungen übertragen. Die Regioselektivität der Reaktion wird an unterschiedlich substituierten Derivaten geprüft. Es wird ein Mechanismus diskutiert, der die beobachteten Regioselektivitäten und die pH-Abhängigkeit der Stereochemie erklärt.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 10
    ISSN: 0009-2940
    Keywords: Ring enlargement ; Phellandrene ; Carbonylation ; Bicyclo[3.2.1]octanes, stereoselective syntheses of ; Iron complexes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Carbonylating Ring Enlargement, 41). - Diastereoselective Syntheses of Bicyclo[3.2.l]oct-3-ene-2,8-diones by Double Carbonylation of (It)-(-)-α-PhellandreneIn order to clarify the stereochemistry of the carbonylating ring enlargement of cyclohexadiene complexes 1 to complexed seven-membered ring ketones 2 and the further carbonylation to bicyclo[3.2.1]oct-3-ene-2,8-diones 3 the exo and endo isomers of (R)-(-)-α-phellandrene complex 7 were synthesized in pure form and in various isomeric ratios and converted. The optically active ring-enlargement products 11 and 12 obtained therefrom, as well as the enantiomerically pure bicyclooctenes 20-22, implicate a stereospecific reaction course under retention of the configuration predetermined by the starting material 6 and its complexes 7. This was confirmed by an X-ray determination of the absolute configuration of exo-12. Thus, the method is suitable for the diastereoselective synthesis of bicyclo[3.2.1]oct-3-ene-2,8-diones 3 from 1,3-cyclohexadiene complexes 1.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...