EFFECTS OF SOLVENTS POLARITY PARAMETERS ON HETEROGENEOUS CATALYTIC HYDROGENATION OF CYCLOHEXENE IN MOLECULAR SOLVENTS

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KHODADADI MOGHADDAM MOHAMMAD; SADEGHZADEH DARABI FARAMARZ

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Journal: JOURNAL OF PHYSICAL AND THEORETICAL CHEMISTRY Year:2011 | Volume:8 | Issue:1 Page(s): 39-45

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Title

EFFECTS OF SOLVENTS POLARITY PARAMETERS ON HETEROGENEOUS CATALYTIC HYDROGENATION OF CYCLOHEXENE IN MOLECULAR SOLVENTS

Author(s)

KHODADADI MOGHADDAM MOHAMMAD | SADEGHZADEH DARABI FARAMARZ | Issue Writer Certificate

Keywords

HETEROGENEOUS CATALYTIC HYDROGENATIONQ3

SOLVATOCHROMIC PARAMETERSQ3

SOLVENT EFFECTSQ2

Abstract

HETEROGENEOUS CATALYTIC HYDROGENATION of cyclohexene, catalyzed by Pt/Al2O3, was carried out in thirteen various solvents (four alcoholic solvents, six aprotic polar solvents and three non polar solvents) at 25oC. Single-parameter correlations of logk vs. normalized polarity parameter (ETN), hydrogen-bond acceptor basicity (b), hydrogen-bond donor acidity (a) and dipolarity/polarizibility (p*) do not give acceptable results. In addition, logk does not show an acceptable dual-parameter correlation with ETN N and a, ETN and b, ETN and p*, a and b, a and p* and b and p*. Like that, three parameter and four parameter correlations of log k vs. SOLVATOCHROMIC PARAMETERS don’t give acceptable results. Correlations of log k vs. acceptor number (AN), donor number (DN), relative static permittivity (e) and dipole moment (m) are tested but don’t give reasonable results. However in case of alcoholic solvents, reaction rate constants increase with increasing of hydrogen-bond donor acidity (a), dipolarity/polarizibility (p*), normalized polarity parameter (ETN), relative static permittivity (e), dipole moment (m) and acceptor number (AN) and decrease with increasing of hydrogen-bond acceptor basicity (b) and donor number (DN). These effects are attributed to the non-polar nature of the reactant and competitive adsorption of solvent on catalyst surface.

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APA: Copy

KHODADADI MOGHADDAM, MOHAMMAD, & SADEGHZADEH DARABI, FARAMARZ. (2011). EFFECTS OF SOLVENTS POLARITY PARAMETERS ON HETEROGENEOUS CATALYTIC HYDROGENATION OF CYCLOHEXENE IN MOLECULAR SOLVENTS. JOURNAL OF PHYSICAL AND THEORETICAL CHEMISTRY, 8(1), 39-45. SID. https://sid.ir/paper/207704/en

Vancouver: Copy

KHODADADI MOGHADDAM MOHAMMAD, SADEGHZADEH DARABI FARAMARZ. EFFECTS OF SOLVENTS POLARITY PARAMETERS ON HETEROGENEOUS CATALYTIC HYDROGENATION OF CYCLOHEXENE IN MOLECULAR SOLVENTS. JOURNAL OF PHYSICAL AND THEORETICAL CHEMISTRY[Internet]. 2011;8(1):39-45. Available from: https://sid.ir/paper/207704/en

IEEE: Copy

MOHAMMAD KHODADADI MOGHADDAM, and FARAMARZ SADEGHZADEH DARABI, “EFFECTS OF SOLVENTS POLARITY PARAMETERS ON HETEROGENEOUS CATALYTIC HYDROGENATION OF CYCLOHEXENE IN MOLECULAR SOLVENTS,” JOURNAL OF PHYSICAL AND THEORETICAL CHEMISTRY, vol. 8, no. 1, pp. 39–45, 2011, [Online]. Available: https://sid.ir/paper/207704/en

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