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  • Organic Chemistry  (8)
  • 113-693A; Age; AGE; Age model, Gradstein et al. (2012) GTS2012; Carbon, organic, total; carbon isotope ratio (δ13C); Cretaceous; DEPTH, sediment/rock; DIMATOC 100 analyzer (Dimatec Corp.); DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Flash Elemental Analyzer 1112 (Thermoquest) coupled to an MAT 253 gas source mass spectrometer; Joides Resolution; Leg113; Ocean Drilling Program; ODP; Sample code/label; South Atlantic; Southern Ocean; total organic carbon (TOC); Weddell Sea; δ13C, organic carbon  (1)
  • 207-1259; AGE; Bolivina anambra, δ13C; Bolivina anambra, δ18O; COMPCORE; Composite Core; DEPTH, sediment/rock; Joides Resolution; Leg207; Lingulogavelinella sp., δ13C; Lingulogavelinella sp., δ18O; Mass spectrometer Fisons Prism III isotope ratio (IRMS); Ocean Drilling Program; ODP; South Atlantic Ocean  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Bond Angles in Lactones and Lactams (1985)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 68 (1985), S. 76-82 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The carbonyl group in lactones and, to a lesser extent, in lactams tends to show a C—C=O angle that is larger than the O—C=O or N—C=O angle, the difference increasing in magnitude as the ring size decreases. The observed trend provides information on ratios of force constants characterising the flexibility of the s-cis-ester group and may be interpreted in terms of incipient chemical reaction to -O—(CH2)n—C≡O+. Molecular orbital calculations (MINDO/3, MNDO, EH) for model compounds provide an electronic interpretation of this angle difference in terms of an anomeric interaction between the p-type lone pair on the carbonyl O-atom and the antibonding C-O or C-N orbital.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19850680110
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  • 2
    Electronic Resource
    Electronic Resource
    A Class of Trinuclear Clusters with Carbonyl Bridging (1980)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 63 (1980), S. 29-49 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The impetus for this work was the structure of a trinuclear complex with two carbonyl groups showing incipient triple bridging - Cp2Rh3(CO)4-. Its structure, barrier to rotation of one Rh(CO)2- piece vs. the rest of the molecule, and the nature of the bridging carbonyl interaction are analyzed. Isolobal analogies form an interesting connection between this complex and a bridged isomer of the recently synthesized carbene complexes, Cp2Rh2(CO)2CR2, one isomer of Cp2Rh3(CO)3, and hypothetical carbyne complexes Cp2Rh2(CO)2CH+,-. A general bonding model for Cp2Rh2(μ-CO)2X complexes is constructed. The model, rich in geometrical detail, allows minima for the bridging carbonyl groups bending toward and away from the bonded ligand X.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19800630105
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  • 3
    Electronic Resource
    Electronic Resource
    Photoelectron Spectra of Vicinal Tricarbonyls (1975)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 58 (1975), S. 2130-2135 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The He I photoelectron spectra of tetramethylcyclopentane-1,2,3-trione 1, 4,4,6,6-tetramethylcyclohexane-1,2,3-trione 2, bicyclo[1.2.3]octane-2,3,4-trione 3, bicyclo[2.2.3]nonane-2,3,4-trione 4 and anhydrous ninhydrine 5 are presented. The assignment of the first two bands is discussed using semiempirical calculations together with a qualitative band shape analysis. It is shown that the first two bands in 1 to 4 are due to the ionization of an electron from lone pair combinations of the 2p-oxygen orbitals.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19750580725
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  • 4
    Electronic Resource
    Electronic Resource
    Ein neuer, einfacher Zugang zu Noradamantanderivaten (1986)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1986 (1986), S. 1779-1786 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A Novel, Facile Access to Noradamantane DerivativesA novel cyclisation reaction allows the insertion of a carbonyl bridge between C-3 and C-7 of the bicyclo[3.3.0]octane skeleton in high yield and thus provides facile, efficient access to variably substituted noradamantanes.
    Notes: Eine neuartige Cyclisierungsreaktion ermöglicht in hoher Ausbeute den Einbau einer Brükken-Carbonylfunktion zwischen C-3 und C-7 des Bicyclo[3.3.0]octan-Gerüstes und eröffnet damit einen einfachen, effizienten Zugang zu variabel substituierten Noradamantanen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198619861011
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  • 5
    Electronic Resource
    Electronic Resource
    Heterocyclische Siebenring-Verbindungen, XV. Die thermische Umlagerung eines 2-Methyl-1-benzoxepins, ein Beitrag zur Frage der Zwischenprodukte der 1-Benzoxepin-Naphthol-Umlagerung (1975)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1975 (1975), S. 1797-1807 
    Details
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Heterocyclic Seven-membered Ring Compounds, XV. - The Thermal Rearrangement of a 2-Methyl-l-benzoxepin, a Contribution to the Search for Intermediates in the 1-Benzoxepin- Naphthol RearrangementThermolysis of the 2-methyl-substituted 1-benzoxepin 4 yields 1,2-dihydronaphthalen-l-one 5, which on prolonged heating gives rise to the isomeric 1,4-dihydronaphthalen-l-one 7. Thermolysis of 4 in methanol however leads to the cis-addition product 9a, from which 5 subsequently regenerated. Thus intermediates B-D of I-benzoxepin rearrangements are verified. The rate of thermolysis of 4 in solution depends upon the ability of the solvent to act as a hydrogen-bond donor.
    Notes: Das 2-Methyl-1-benzoxepin 4 lagert sich beim Erhitzen zunächst in das 1,2-Dihydronaphthalin-1-on 5 um, das bei längerer Reaktionszeit in das isomere 1,4-Dihydronaphthalin-l-on 7 übergeht. Bei der Thermolyse von 4 in Methanol entsteht zunächst die cis-Additionsverbindung 9a und daraus dann wieder 5. Dadurch werden die Zwischenstufen B - D dieser Umlagerung bewiesen. Die Geschwindigkeit der Thermolyse von 4 hängt von der Fähigkeit des Lösungsmittels ab, als Wasserstoffbrückendonator zu wirken.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.197519751008
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  • 6
    Electronic Resource
    Electronic Resource
    Heterocyclische Siebenring-Verbindungen, XII1) Synthese 3,5-substituierter 4-Phenyl-1-benzoxepine über 2,3-Dihydro-Vorstufen (1974)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1974 (1974), S. 1301-1314 
    Details
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Heterocyclic Seven-membered Ring Compounds XII1). - Synthesis of 3,5-Substituted 4-Phenyl-1-benzoxepins via 2,3-Dihydro PrimersThe 4-phenyl-2,3-dihydro-1-benzoxepin-3-ones 7 and 13 have been alkylated or acetylated to the 1-benzoxepins 8, 10, 17, and 19; synthesis of 16 was achieved by dehydrobromination of 15.
    Notes: Die 4-Phenyl-2,3-dihydro-1-benzoxepin-3-one 7 und 13 wurden zu den 1-Benzoxepinen 8, 10, 17 und 19 alkyliert oder acetyliert. Die Synthese von 16 gelang durch Bromwasserstoffabspaltung aus 15.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.197419740817
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  • 7
    Electronic Resource
    Electronic Resource
    Heterocyclische Siebenring-Verbindungen, XIV. Diels-Alder-Reaktionen substituierter 1-Benzoxepine (1975)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1975 (1975), S. 1571-1575 
    Details
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Heterocyclic Seven-membered Ring Compounds, XIV. - Diels-Alder Reactions of Substituted 1-BenzoxepinReaction of the 1-benzoxepins la - e with ethylenetetracarbonitrile yields the corresponding 3,4-benzo-2-oxabicyclo[3.2.2]non-3,8-dienes. The rate of the addition reaction is governed by position and donor strength of the substituents in the hetero-ring of la -e.
    Notes: Die I-Benzoxepine 1a- e reagieren mit Äthylentetracarbonitril zu Derivaten des 3,4-Benzo- 2-oxabicyclo[3.2.2]non-3,8-diens, wobei die Tendenz zur Diels-Alder-Reaktion durch Stellung und Donorstärke der Substituenten im Heteroring von la - e bestimmt wird.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.197519750904
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  • 8
    Electronic Resource
    Electronic Resource
    Heterocyclische Siebenring-Verbindungen, XVIII. Einfluß der Substituenten auf die photochemische 1-Benzoxepin-Umlagerung (1977)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1977 (1977), S. 1597-1609 
    Details
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Heterocyclic Seven-Membered Ring Compounds, XVIII. - The Influence of Different Substituents upon the Photorearrangement of 1-BenzoxepinsThe relative tendency of a series of 4-phenyl-1-benzoxepins 3 to undergo photochemical isomerizations yielding the corresponding 1-phenyl-2a,7b-dihydrocyclobuta[b]-1-benzo-furans 4 has been investigated experimentally with respect to different substitution patterns. It can be shown that effects of π-acceptor- and π-donor substituents, respectively, are explained well by a simple π MO model based upon perturbation theory.
    Notes: Die relative photochemische Umlagerungstendenz von gezielt substituierten 4-Phenyl-1-benzoxepinen 3 zu den entsprechenden 1-Phenyl-2a,7b-dihydrocyclobuta[b]-1-benzofuranen 4 wurde experimentell im Hinblick auf ihre Substituentenabhängigkeit untersucht. Es wird gezeigt, daß sich die gefundenen Effekte von π-Acceptor- oder π-Donorsubstituenten befriedigend auf der Basis eines einfachen störungstheoretischen π-MO-Modells deuten lassen.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.197719771003
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  • 9
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    (Table S4) TEX86 and BIT indices and temperature estimation for ODP Site 207-1259 (2008)
    PANGAEA
    Details
    Publication Date: 2024-02-02
    Keywords: 207-1259; AGE; Bolivina anambra, δ13C; Bolivina anambra, δ18O; COMPCORE; Composite Core; DEPTH, sediment/rock; Joides Resolution; Leg207; Lingulogavelinella sp., δ13C; Lingulogavelinella sp., δ18O; Mass spectrometer Fisons Prism III isotope ratio (IRMS); Ocean Drilling Program; ODP; South Atlantic Ocean
    Type: Dataset
    Format: text/tab-separated-values, 140 data points
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  • 10
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    Early Cretaceous total organic carbon contents and stable carbon isotope ratios at ODP Site 113-693 (2022)
    PANGAEA
    Details
    Publication Date: 2024-02-02
    Keywords: 113-693A; Age; AGE; Age model, Gradstein et al. (2012) GTS2012; Carbon, organic, total; carbon isotope ratio (δ13C); Cretaceous; DEPTH, sediment/rock; DIMATOC 100 analyzer (Dimatec Corp.); DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Flash Elemental Analyzer 1112 (Thermoquest) coupled to an MAT 253 gas source mass spectrometer; Joides Resolution; Leg113; Ocean Drilling Program; ODP; Sample code/label; South Atlantic; Southern Ocean; total organic carbon (TOC); Weddell Sea; δ13C, organic carbon
    Type: Dataset
    Format: text/tab-separated-values, 80 data points
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