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Volumn 111, Issue 42, 2007, Pages 10754-10768

Should contemporary density functional theory methods be used to study the thermodynamics of radical reactions?

Author keywords

[No Author keywords available]

Indexed keywords

DISSOCIATION; ENTHALPY; FREE RADICAL REACTIONS; MATHEMATICAL MODELS; THERMODYNAMICS;

EID: 35748940326     PISSN: 10895639     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp075837w     Document Type: Article
Times cited : (142)

References (48)
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    • For recent successful applications in controlled radical polymerization, see for example: (a) Coote, M. L.; Henry, D. J. Macromolecules 2005, 38, 5774-5779.
    • (2005) Macromolecules , vol.38 , pp. 5774-5779
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    • See for example: a
    • See for example: (a) Check. C. E.; Gilbert, T. M. J. Org. Chem. 2005, 70, 9828-9834.
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    • Frisch, M. J.; Trucks, G. W.; Schlegel, H. B.; Scuseria, G. E.; Robb, M. A.; Cheeseman, J. R.; Montgomery. J. A., Jr.; Vreven, T.; Kudin, K. N.; Burant, J. C.; Millam, J. M.; Iyengar, S. S.; Tomasi, J.; Barone, V.: Mennucci, B.; Cossi, M.; Scalmani, G.; Rega, N.; Petersson, G. A.; Nakatsuji, H.; Hada, M.; Ehara, M.; Toyota, K.; Fukuda, R.; Hasegawa, J.; Ishida, M.; Nakajima, T.; Honda, Y.; Kitao, O.; Nakai, H.; Kiene, M.; Li, X.; Knox, J. E.; Hratchian, H. P.; Cross, J. B.; Bakken, V.; Adamo, C.; Jaramillo, J.; Gomperts, R.; Stratmann, R. E.; Yazyev, O.; Austin, A. J.; Cammi, R.; Pomelli, C.; Ochterski, J. W.; Ayala, P. Y.; Morokuma, K.; Voth, G. A.; Salvador, P.; Dannenberg, J. J.; Zakrzewski, V. G.; Dapprich, S.; Daniels, A. D.; Strain, M. C.; Farkas, O.; Malick, D. K.; Rabuck, A. D.; Raghavachari, K.; Foresman, J. B.; Ortiz, J. V.; Cui, Q.; Baboul, A. G.; Clifford, S.; Cioslowski, J.; Stefanov, B. B.; Liu, G.; Liashenko, A.; Piskorz, P.; Komaromi, I.; Martin, R. L.; Fox, D. J.; Keith, T.; Al-Laham, M. A.; Peng, C. Y.; Nanayakkara, A.; Challacombe, M.; Gill, P. M. W.; Johnson, B.; Chen, W.; Wong, M. W.; Gonzalez, C.; Pople. J. A. Gaussian 03, revision C.02: Gaussian, Inc.: Wallingford, CT, 2004.
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    • A referee has subsequently alerted us to the publication of this basis set by the Curtiss group on the G3 website
    • A referee has subsequently alerted us to the publication of this basis set by the Curtiss group on the G3 website, http://chemistry.anl.gov/compmat/ comptherm.htm.
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    • See for example: Wong. M. W.; Radom, L. J. Phys. Chem. 1998, 102, 2237-2245.
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    • It should be noted that, in applying the HLC, we interpreted the number of lone pair electrons to mean the total number of electrons in lone pairs. However, we noticed that the MAD of KMLYP versus experiment for the 34 reactions for which testing was possible improved from 13.0 to 5.7 kJ mol-1 if we treated nv as the number of lone pairs and counted π bonds as lone pairs. These changes to the HLC would have improved the absolute values of the halide BDEs and the β-scission reactions but would not have affected the other BDEs or reaction energies. Moreover, because the HLC cancels entirely from the relative values of the reaction energies, the use of the improved HLC did not affect the main comparisons between KMLYP and G3(MP2)-RAD made throughout this study
    • -1 if we treated nv as the number of lone pairs and counted π bonds as lone pairs. These changes to the HLC would have improved the absolute values of the halide BDEs and the β-scission reactions but would not have affected the other BDEs or reaction energies. Moreover, because the HLC cancels entirely from the relative values of the reaction energies, the use of the improved HLC did not affect the main comparisons between KMLYP and G3(MP2)-RAD made throughout this study.
  • 39
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    • Unless noted otherwise, experimental BDEs are taken from Luo, Y.-R. Handbook of Bond Dissociation Energies in Organic Compounds; CRC Press: Boca Raton, FL, 2003, and corrected to 0 K using calculated B3LYP/6-31G(d) temperature corrections. Where multiple experimental values are quoted, the value recommended by Luo is used.
    • Unless noted otherwise, experimental BDEs are taken from Luo, Y.-R. Handbook of Bond Dissociation Energies in Organic Compounds; CRC Press: Boca Raton, FL, 2003, and corrected to 0 K using calculated B3LYP/6-31G(d) temperature corrections. Where multiple experimental values are quoted, the value recommended by Luo is used.
  • 40
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    • The heats of formation of the closed-shell species needed to calculate the experimental /rescission energies in Tables 2 and 7 were taken from the NIST Chemisty WebBook; NIST Standard Reference Database 69; June 2005 release, Where multiple values are quoted, the most recent values were used
    • The heats of formation of the closed-shell species needed to calculate the experimental /rescission energies in Tables 2 and 7 were taken from the NIST Chemisty WebBook; NIST Standard Reference Database 69; June 2005 release, http://webbook.nist.gov/chemistry/. Where multiple values are quoted, the most recent values were used.
  • 41
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    • Coote, M. L.; Pross, A.; Radom, L. In Fundamental World of Quantum Chemistry: A Tribute to the Memory of Per-Olov Löwdin, III; Brändas, E. J., Kryachko, E. J., Eds.; Kluwer-Springer: Dordrecht, The Netherlands, 2004; pp 563-579.
    • Coote, M. L.; Pross, A.; Radom, L. In Fundamental World of Quantum Chemistry: A Tribute to the Memory of Per-Olov Löwdin, Volume III; Brändas, E. J., Kryachko, E. J., Eds.; Kluwer-Springer: Dordrecht, The Netherlands, 2004; pp 563-579.
  • 43
    • 35748955697 scopus 로고    scopus 로고
    • 3), and not for the absolute enthalpies (as calculated in the original work). Normally one would expect smaller MADs in the relative values due to systematic cancellation of error. For RMP2, this isthe case; however, with the DFT methods, the errors accumulate and the MADs are actually larger.
    • 3), and not for the absolute enthalpies (as calculated in the original work). Normally one would expect smaller MADs in the relative values due to systematic cancellation of error. For RMP2, this isthe case; however, with the DFT methods, the errors accumulate and the MADs are actually larger.


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