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Volumn 130, Issue 31, 2008, Pages 10369-10379

Mechanistic consequences of composition in acid catalysis by polyoxometalate keggin clusters

Author keywords

[No Author keywords available]

Indexed keywords

ACIDS; ALCOHOLS; ATOMIC PHYSICS; ATOMS; BROMINE COMPOUNDS; CATALYSIS; CHARGE DENSITY; CHARGE DISTRIBUTION; CHLORINE COMPOUNDS; COBALT; DEHYDRATION; DEUTERIUM; DEWATERING; DIFFERENCE EQUATIONS; DIMERS; DYES; DYNAMICS; ENTHALPY; EQUILIBRIUM CONSTANTS; ETHERS; FORMING; GARNETS; IONS; ISOMERS; ISOTOPES; OLEFINS; OLIGOMERS; ORGANIC COMPOUNDS; PHASE EQUILIBRIA; PROTONS; SENSITIVITY ANALYSIS; SILICA; SILICATE MINERALS; SILICON; STABILIZATION; THERMODYNAMICS;

EID: 48749130109     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja803114r     Document Type: Article
Times cited : (148)

References (35)
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    • Frisch, M.J.1
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    • We note that both rate constants reflect the saturation coverage of either butoxides in 1-butene double bond isomerization or adsorbed butanol monomers in 2-butanol dehydration and allow rigorous conclusions with respect to the kinetic relevance of the butoxide desorption and the elimination step
    • We note that both rate constants reflect the saturation coverage of either butoxides in 1-butene double bond isomerization or adsorbed butanol monomers in 2-butanol dehydration and allow rigorous conclusions with respect to the kinetic relevance of the butoxide desorption and the elimination step.
  • 13
    • 48749127114 scopus 로고    scopus 로고
    • The high pre-exponential factor of the elimination step leads to rate constants for the elimination and butene desorption steps that differ less than expected from the calculated barriers (see also section 3.2).
    • The high pre-exponential factor of the elimination step leads to rate constants for the elimination and butene desorption steps that differ less than expected from the calculated barriers (see also section 3.2).
  • 14
    • 48749103886 scopus 로고    scopus 로고
    • -1) Anslyn, E. V.; Dougherty, D. A. Modern Physical Organic Chemistry; University Science Books: New York, 2006; p 93.
    • -1) Anslyn, E. V.; Dougherty, D. A. Modern Physical Organic Chemistry; University Science Books: New York, 2006; p 93.
  • 15
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    • 4 by DFT, corresponding to zero point energy differences ΔZPE(D)-ZPE(H) of about 8.3 kJ/mol, leading to a KIE of 18.8.
    • 4 by DFT, corresponding to zero point energy differences ΔZPE(D)-ZPE(H) of about 8.3 kJ/mol, leading to a KIE of 18.8.
  • 16
    • 0014777656 scopus 로고
    • the high isotope effects which result from deuteration in α-position imply a rate-determining participation of the Cα-H(D) bond fission during the dehydration course
    • Knözinger, H.; Scheglila, A. J. Catal. 1970, 17, 252. ("the high isotope effects which result from deuteration in α-position imply a rate-determining participation of the Cα-H(D) bond fission during the dehydration course")
    • (1970) J. Catal , vol.17 , pp. 252
    • Knözinger, H.1    Scheglila, A.2
  • 27
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    • 2O (ion-dipole) interaction.
    • 2O (ion-dipole) interaction.
  • 30
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    • The transition state of alkene desorption on POM clusters has been shown to be concerted and to involve both a weak interaction of Cα (which carries the positive charge) with a terminal oxygen of the POM cluster and the interaction of a β-H with the bridging oxygen of the POM cluster. Abstraction of the β-H and formation of the alkene double bond will lead to the formation of the 1-alkene species. Campbell, K. A, Janik, M. J, Neurock, M, Davis, R. J. Langmuir 2004, 21, 4738
    • α (which carries the positive charge) with a terminal oxygen of the POM cluster and the interaction of a β-H with the bridging oxygen of the POM cluster. Abstraction of the β-H and formation of the alkene double bond will lead to the formation of the 1-alkene species. Campbell, K. A.; Janik, M. J.; Neurock, M.; Davis, R. J. Langmuir 2004, 21, 4738.
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    • Meot-Ner (Mautner) , M. J. Am. Chem. Soc. 1984, 106, 1257.
    • Meot-Ner (Mautner) , M. J. Am. Chem. Soc. 1984, 106, 1257.
  • 34
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    • POM hydrogen bonds between the cationic dimer and the anionic conjugate base [ref 10].
    • POM hydrogen bonds between the cationic dimer and the anionic conjugate base [ref 10].
  • 35
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    • +)).
    • +)).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.