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  • Saturated organic compounds, MO treatment of ∼  (3)
  • (Z)-11-hentriacontene  (2)
  • Springer  (5)
  • Nature Publishing Group
  • Oxford University Press
  • Springer Nature
  • 1975-1979  (5)
  • 1970-1974
  • 1960-1964
  • 1935-1939
Collection
Keywords
Publisher
  • Springer  (5)
  • Nature Publishing Group
  • Oxford University Press
  • Springer Nature
Years
  • 1975-1979  (5)
  • 1970-1974
  • 1960-1964
  • 1935-1939
Year
  • 1
    Electronic Resource
    Electronic Resource
    Linear combination of hybrid orbitals: Acyclic alkanes (1977)
    Springer
    Theoretical chemistry accounts 43 (1977), S. 287-297 
    Details
    ISSN: 1432-2234
    Keywords: Hybrids, linear combination of ∼ ; Saturated organic compounds, MO treatment of ∼ ; Spectra, far ultraviolet
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A LCHO SCF-CI semiempirical scheme is formulated for compounds of carbon and hydrogen, and far-UV transition energies computed for a number of acyclic alkanes. The type of spectral bands (CH → CH*, etc.) and symmetries of subbands are assigned, and their dependence on conformation and branching discussed. It is argued that, for pentanes and higher alkanes, spectral quantities can be estimated from data on the lower alkanes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00548685
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  • 2
    Electronic Resource
    Electronic Resource
    Comments on the electronic properties of cyclopropane, cyclobutane, and cyclohexane (1977)
    Springer
    Theoretical chemistry accounts 45 (1977), S. 45-52 
    Details
    ISSN: 1432-2234
    Keywords: Hybrids, linear combination of ∼ ; Saturated organic compounds, MO treatment of ∼ ; Spectra, far ultraviolet ∼ ; Cyclobutane, auxochromic effect of ∼
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Spectral quantities of cyclopropane, cyclobutane, cyclohexane, and of several derivatives, have been calculated by a semiempirical all-valence electron SCF-CI MO method. In cyclopropane, HOMO is practically localized in the carbon-frame, and LVMO is purely so. In cyclobutane, these two MO's are based on C-H bonds, while cyclohexane holds an intermediate position. Despite the overall similarity-experimental and computed-of the spectra of these molecules, assignments are non-parallel. Like cyclopropane, cyclobutane can extend conjugation, but to a diminished degree; cyclohexane behaves in this respect like an acyclic alkane. An interpretation of this gradation, in terms of the nature of high-lying MO's, is proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00551457
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  • 3
    Electronic Resource
    Electronic Resource
    Molecular-orbital realizations of the bent-bond model: Spiranic derivatives of cyclobutanone (1978)
    Springer
    Theoretical chemistry accounts 47 (1978), S. 27-38 
    Details
    ISSN: 1432-2234
    Keywords: Hybrids, linear combination of ∼ ; Saturated organic compounds, MO treatment of ∼ ; Small rings ; Carbonyl stretching frequency
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract In the frame of our studies on small-ring compounds, we deal here with structures in which a three-membered ring and a carbonylated four-membered ring are fixed in close proximity. The theoretical approach is through an allvalence electron semiempirical method. The experimental background, based on results of other workers, comprises mainly UV and IR spectral data. The main topics to be discussed are: charge-donation and charge-transfer from the 3-ring, hypsochromic and bathochromic shifts of electronic transitions related to the carbonyl, direct substituent effects on the carbonyl stretching frequency, and the across-ring interaction in cyclobutanone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00554694
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  • 4
    Electronic Resource
    Electronic Resource
    Mating stimulant pheromone and cuticular lipid constituents ofFannia femoralis (Stein) (Diptera: Muscidae) (1978)
    Springer
    Journal of chemical ecology 4 (1978), S. 83-93 
    Details
    ISSN: 1573-1561
    Keywords: Fannia femoralis (Stein) ; pheromone ; mating stimulant pheromone ; (Z)-11-hentriacontene ; cuticular lipid ; fly
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The cuticular lipids of male and femaleFannia femoralis were similar for recently emerged insects but soon began to develop chromatographic patterns characteristic of each sex. Mature females contained more C31 and C33 monoolefin in the cuticular lipid than males. Also, the double bonds in the monoolefins of the female lipid were situated predominantly at the eleventh and thirteenth carbons, while most of those from the males were centrally located in the molecule or at the ninth carbon. The female C31 monoolefin stimulated copulation by the males, but more mating activity occurred when the saturated hydrocarbons present in the female cuticular lipids were added. The synthetic monoolefin most active as a mating stimulant pheromone was (Z)-11-hentriacontene, but the addition of female alkanes or of syntheticn-alkanes to (Z)-11-hentriacontene increased the activity of the synthetic pheromone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00988263
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  • 5
    Electronic Resource
    Electronic Resource
    Mating stimulant pheromone and cuticular lipid constituents ofFannia pusio (Wiedemann) (Diptera: Muscidae) (1978)
    Springer
    Journal of chemical ecology 4 (1978), S. 73-81 
    Details
    ISSN: 1573-1561
    Keywords: Fannia pusio (Wiedemann) ; pheromone ; mating stimulant pheromone ; (Z)-11-hentriacontene ; cuticular lipid ; fly
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Chromatograms of the cuticular lipids washed from newly emerged male and femaleFannia pusio were nearly identical. By the time the flies were 1 day old, the chromatographic profiles for the sexes were different. Mature females contained more C31- and C33-hydrocarbons than the males. The double bonds of the female monoolefins were mostly at the eleventh and thirteenth carbons, but those of the males were predominantly at the ninth carbon. Most active in stimulating copulation by males were the unbranched monoolefins with 31 and 33 carbons from the females. When they were synthesized and tested, the most active compound was (Z)-11-hentriacontene.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00988262
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