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0001304578
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C. Galli, A. Guarnieri, H. F. Koch, P. Mencarelli, Z. Rappoport, J. Org. Chem. 1997, 62, 4072-4077. The vinyl radicals with α-substituents H, Cl and F were also calculated at the higher level B3LYP/6-311G(2d,2p).
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C. Galli, A. Guarnieri, H. F. Koch, P. Mencarelli, Z. Rappoport, J. Org. Chem. 1997, 62, 4072-4077. The vinyl radicals with α-substituents H, Cl and F were also calculated at the higher level B3LYP/6-311G(2d,2p).
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20
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38849114324
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G. Lodder, chapter 8 in Dicoordinated Carbocations (Eds.: Z. Rappoport, P. J. Stang), Wiley, West Sussex, 1997;
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a) G. Lodder, chapter 8 in Dicoordinated Carbocations (Eds.: Z. Rappoport, P. J. Stang), Wiley, West Sussex, 1997;
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23
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38849199678
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P. J. Kropp, chapter 84 in CRC Handbook of Organic Photochemistry and Photobiology (Eds.: W. M. Horspool, P.-S. Song), CRC Press, Boca Raton, 1995;
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b) P. J. Kropp, chapter 84 in CRC Handbook of Organic Photochemistry and Photobiology (Eds.: W. M. Horspool, P.-S. Song), CRC Press, Boca Raton, 1995;
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24
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38849159987
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T. Kitamura, chapter 85 in CRC Handbook of Organic Photochemistry and Photobiology (Eds.: W. M. Horspool, P.-S. Song), CRC Press, Boca Raton, 1995;
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c) T. Kitamura, chapter 85 in CRC Handbook of Organic Photochemistry and Photobiology (Eds.: W. M. Horspool, P.-S. Song), CRC Press, Boca Raton, 1995;
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25
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38849096427
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G. Lodder, J. Cornelisse, chapter 16 in The Chemistry of Functional Groups: Supplement D2 (Eds.: S. Patai, Z. Rappoport), Wiley, Chichester, 1995.
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d) G. Lodder, J. Cornelisse, chapter 16 in The Chemistry of Functional Groups: Supplement D2 (Eds.: S. Patai, Z. Rappoport), Wiley, Chichester, 1995.
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38849202454
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Manuscript in preparation
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b) E. S. Krijnen, K. Van Alem, D. H. J. Van der Vlugt, H. Zuilhof, G. Lodder, Manuscript in preparation.
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K. Van Alem, G. Belder, G. Lodder, H. Zuilhof, J. Org. Chem. 2005, 70, 179-190.
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38849095238
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[17,16,18]. where the points of focus are the cation-derived products.
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[17,16,18]. where the points of focus are the cation-derived products.
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31
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In the presence of oxygen, next to c and d, other vinyl radical-derived products are produced. See: J. M. Verbeek, M. Stapper, E. S. Krijnen, J.-D. Van Loon, G. Lodder, S. Steenken, J. Phys. Chem. 1994, 98, 9526-9536
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In the presence of oxygen, next to c and d, other vinyl radical-derived products are produced. See: J. M. Verbeek, M. Stapper, E. S. Krijnen, J.-D. Van Loon, G. Lodder, S. Steenken, J. Phys. Chem. 1994, 98, 9526-9536.
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38849185293
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A trace amount of Ph-C≡C-F is produced via β-proton loss from the vinylic cation
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A trace amount of Ph-C≡C-F is produced via β-proton loss from the vinylic cation.
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36
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0001081620
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a) G. T. Whitesides, C. P. Casey, J. K. Krieger, J. Am. Chem. Soc. 1971, 93, 1379-1389;
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0000181879
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The C-H bond dissociation energies of ethene and methanol are 108 and 92.6 kcal/mol, respectively, according to: K. W. Egger, A. T. Cocks, Helv. Chim. Acta 1973, 56, 1516-1536.
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The C-H bond dissociation energies of ethene and methanol are 108 and 92.6 kcal/mol, respectively, according to: K. W. Egger, A. T. Cocks, Helv. Chim. Acta 1973, 56, 1516-1536.
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44
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38849209145
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[10] plot final concentration ratios instead of reaction rate ratios. Care must be taken, however, to avoid free radical induced cis/trans isomerization or, in the case of photochemical approaches, photochemical isomerization;
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[10] plot final concentration ratios instead of reaction rate ratios. Care must be taken, however, to avoid free radical induced cis/trans isomerization or, in the case of photochemical approaches, photochemical isomerization;
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46
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38849161488
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The difference in activation enthalpy for an exothermic radical scavenging will be mainly composed of the difference in steric repulsion for cis and trans attack, which follows from the Bell-Evans-Polanyi principle.
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The difference in activation enthalpy for an exothermic radical scavenging will be mainly composed of the difference in steric repulsion for cis and trans attack, which follows from the Bell-Evans-Polanyi principle.
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47
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38849199677
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The vibrational contribution to the molecular partition function, and thus to the entropy is usually the largest. The normal modes of a molecule, in turn, are determined by symmetry; cf., for instance, P. W. Atkins, Physical Chemistry, Oxford University Press, Oxford, 1995, 5th edition, chapters 16, 19 and 20.
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The vibrational contribution to the molecular partition function, and thus to the entropy is usually the largest. The normal modes of a molecule, in turn, are determined by symmetry; cf., for instance, P. W. Atkins, Physical Chemistry, Oxford University Press, Oxford, 1995, 5th edition, chapters 16, 19 and 20.
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51
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38849165258
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Irradiation of 5a yields Ph-C≡C-C≡C-H and Ph-C(H)=C=C=C(H)-Br (tentative structure), produced from the vinylic cation by β-proton loss and 1,3-bromide shift, respectively.
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Irradiation of 5a yields Ph-C≡C-C≡C-H and Ph-C(H)=C=C=C(H)-Br (tentative structure), produced from the vinylic cation by β-proton loss and 1,3-bromide shift, respectively.
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52
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38849168158
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