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  • 1
    Electronic Resource
    Electronic Resource
    Photobehavior of copper(I) compounds. 4. Role of the triplet state of (arylphosphine)copper(I) complexes in the photosensitized isomerization of dienes (1988)
    s.l. : American Chemical Society
    Inorganic chemistry 27 (1988), S. 1311-1316 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic00281a002
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  • 2
    Electronic Resource
    Electronic Resource
    Importance of ground-state complex formation in the cuprous chloride-sensitized photoisomerization of cis,cis-1,5-cyclooctadiene to tricyclo[3.3.0.0.2,6]octane (1982)
    s.l. : American Chemical Society
    Inorganic chemistry 21 (1982), S. 414-418 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic00131a075
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  • 3
    Electronic Resource
    Electronic Resource
    Formation constants of copper(I) chloride complexes with cis,cis-1,5-cyclooctadiene and other cyclic olefins (1986)
    s.l. : American Chemical Society
    Inorganic chemistry 25 (1986), S. 1972-1976 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic00232a014
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  • 4
    Electronic Resource
    Electronic Resource
    Crystal structures of thetrans-cyclooctene complexes of copper(I) chloride and silver nitrate (1988)
    Springer
    Journal of chemical crystallography 18 (1988), S. 293-306 
    Details
    ISSN: 1572-8854
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The crystal and molecular structures of the title compounds CuCl·C8H14 and AgNO3·C8H14, have been determined by single-crystal X-ray diffraction techniques, and refined by full-matrix least squares. Both compounds crystallize in the orthorhombic space groupPbca witha=6.191(7),b=12.456(2),c=23.272(4) Å for CuCl·C8H14, anda=7.383(2),b=9.825(2),c=26.980(5) Å for AgNO3·C8H14;Z=8 in both cases. FinalR factors are 0.047 and 0.029 respectively. The cyclooctene ring has the twist chair-chair (TCC) conformation, with approximateD 2 symmetry, in both compounds, and the torsion angles around the double bonds are −134.2(4) and −137.0(4)° respectively. Slight lengthening of the metal-complexed double bond is attributed to enhanced olefin → metal σ-donation of thetrans bond.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01194320
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  • 5
    Electronic Resource
    Electronic Resource
    Voltammetric characterization of activated carbons in modified carbon paste electrodes (1993)
    Weinheim : Wiley-Blackwell
    Electroanalysis 5 (1993), S. 509-516 
    Details
    ISSN: 1040-0397
    Keywords: Carbon paste electrodes ; Activated carbon ; Modified electrodes ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Carbon paste electrodes (CPEs), modified by the addition of small amounts of finely powdered activated carbon (AC) were studied using cyclic (CV) and square wave voltammetry (SWV). Cyclic voltammograms revealed the expected increase in surface area associated with the presence of the activated carbon but did not reveal any specific redox peaks. Square wave voltammograms of both the modified and unmodified electrodes obtained in acidic solution were characterized by well-defined redox peaks whose behavior was consistent with that expected for couples of the quinone/hydroquinone type. The modified electrodes showed generally larger peaks than the unmodified ones. Regardless of the origin of the activated carbons, the square wave voltammetric response was fairly similar, and it was not possible to confidently differentiate between the different types on this basis.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140050521
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  • 6
    Electronic Resource
    Electronic Resource
    Kinetic and equilibrium study of gas-phase interconversions of 1,3,6-cyclooctatriene, 1,3,5-cyclooctatriene and bicyclo[4.2.0]octa-2,4-diene (1983)
    New York, NY : Wiley-Blackwell
    International Journal of Chemical Kinetics 15 (1983), S. 1069-1080 
    Details
    ISSN: 0538-8066
    Keywords: Chemistry ; Physical Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The gas-phase equilibrium and rate constants for the isomerizations of 1,3,6-cyclooctatriene (136COT) to 1,3,5-cyclooctatriene (135COT) [reaction (1)] and bicyclo[4.2.0]octa-2,4-diene (BCO) to 135COT [reaction (-2)] have been measured between 390 and 490 K and between 330 and 475 K, respectively. The rate constant of reaction (1) obeys the Arrhenius equation \documentclass{article}\pagestyle{empty}\begin{document}$$k_{\rm 1} = 10^{10.93 \pm 0.08} {\rm exp}[- (115.9 \pm 0.7{\rm kJ}/{\rm mol})/RT]{\rm s}^{ - 1}$$\end{document} The corresponding equilibrium constant is given by the van′t Hoff equation \documentclass{article}\pagestyle{empty}\begin{document}$${\rm In K}_{\rm 1}^{\rm 0} = (0.24 \pm 0.04) + (13.78 \pm 0.15{\rm kJ}/{\rm mol})/RT$$\end{document} The strain energy of the 136COT ring is calculated to be 31.7 kJ/mol, based on the known value of 37.2 kJ/mol for 135COT, and ΔHf0(298 K) for gaseous 136COT is 196.3 kJ/mol. The rate constant of reaction (-2) obeys the Arrhenius equation \documentclass{article}\pagestyle{empty}\begin{document}$$k_{{\rm - 2}} = 10^{12.38 \pm 0.23} {\rm exp}[(- 106.9 \pm 1.5{\rm kJ}/{\rm mol})/RT]{\rm s}^{ - 1}$$\end{document} The equilibrium constant for 135COT ⇆ BCO fits the van′t Hoff equation \documentclass{article}\pagestyle{empty}\begin{document}$${\rm In K}_{\rm 2}^{\rm 0} = (- 1.20 \pm 0.02) - (0.40 \pm 0.07{\rm kJ}/{\rm mol})/RT$$\end{document} The strain energy of the BCO skeleton is calculated to be 108.3 kJ/mol, and ΔHf0(298 K) for gaseous BCO is 183.3 kJ/mol.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/kin.550151011
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  • 7
    Electronic Resource
    Electronic Resource
    Vibrational energy transfer from chemically activated 1,4-cyclohexadiene (1982)
    New York, NY : Wiley-Blackwell
    International Journal of Chemical Kinetics 14 (1982), S. 43-53 
    Details
    ISSN: 0538-8066
    Keywords: Chemistry ; Physical Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The thermal isomerization of cis, anti, cis-tricyclo[3.1.0.02,4] hexane was used to produce highly vibrationally excited 1,4-cyclohexadiene. The competition between unimolecular decomposition of the energized diene (to benzene and hydrogen) and collisional stabilization was studied using the parent compound, SF6, CO2, N2, and He as quenching gases. Quenching efficiencies decreased in the order given above. By applying RRKM theory to the isomerization and decomposition reactions, it was possible to calculate the step size in a stepladder model of the deactivation of cyclohexadiene. The step sizes 〈ΔE〉 deduced (at 528 K and in units of kJ/mol) were: parent compound and SF6, 7; CO2, 5; N2, 4; He, 2. The study confirmed the utility of this unimolecular chemical activation system for energy transfer studies.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/kin.550140106
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  • 8
    Electronic Resource
    Electronic Resource
    Direct and sensitized photolysis of bicyclo[4.2.0]octa-2,4-diene in the gas phase (1987)
    New York, NY : Wiley-Blackwell
    International Journal of Chemical Kinetics 19 (1987), S. 229-242 
    Details
    ISSN: 0538-8066
    Keywords: Chemistry ; Physical Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The direct photolysis of bicyclo[4.2.0]octa-2,4-diene in the gas phase at 280-300 nm produces mainly 1,3,5-cyclooctatriene and benzene plus ethylene. The yield of the former product is enhanced by added gases, and it is proposed that it is formed in a vibrationally excited state which can revert to bicyclooctadiene unless the excess energy is removed in collisions. Computer modelling of the direct photolysis yielded quantitative agreement with the experimental results, but only when large, arbitrary adjustments were made to the calculated rate constants for the interconversion of cyclooctratriene and bicyclooctadiene. The Hg(63P1) sensitized reaction of bicyclooctadiene produces mainly benzene plus ethylene, a process which is also enhanced by added gases.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/kin.550190306
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