Energetics and structural properties of neutral and deprotonated phenyl carbinols

•We determined ΔfHm0(g) of neutral and deprotonated (in the OH group) phenyl-carbinols.•DFT/M05-2X is a good method to estimate ΔfHm0(g) and GA values for phenyl carbinols.•α-alkyl, phenyl and CF3 substituents in methanol significantly enhance the acidity. Theoretical and experimental studies on the...

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Veröffentlicht in:The Journal of chemical thermodynamics 2016-06, Vol.97, p.315-321
Hauptverfasser: Dávalos, Juan Z., Guerrero, Andrés, Valderrama-Negrón, Ana C., Romero, Violeta, Lago, Alexsandre F.
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container_end_page 321
container_issue
container_start_page 315
container_title The Journal of chemical thermodynamics
container_volume 97
creator Dávalos, Juan Z.
Guerrero, Andrés
Valderrama-Negrón, Ana C.
Romero, Violeta
Lago, Alexsandre F.
description •We determined ΔfHm0(g) of neutral and deprotonated (in the OH group) phenyl-carbinols.•DFT/M05-2X is a good method to estimate ΔfHm0(g) and GA values for phenyl carbinols.•α-alkyl, phenyl and CF3 substituents in methanol significantly enhance the acidity. Theoretical and experimental studies on the energetics, structure and other physicochemical properties of neutral 1-phenylethanol (1OH), diphenylmethanol (2OH) and triphenylmethanol (3OH) and their corresponding deprotonated anions (oxyanions, formed by deprotonation of the OH group) are reported in this work. The standard enthalpies of formation in the gas phase at T=298.15K, ΔfHm0(g) have been determined. Quantum chemical calculations, at the DFT (particularly M05-2X method) and in some cases at the ab initio (G3) levels, have shed light on structural and electronic effects on the thermodynamic stability and intrinsic acidity of the studied compounds. These calculations confirmed the excellent consistency of the experimental results.
doi_str_mv 10.1016/j.jct.2016.02.010
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Theoretical and experimental studies on the energetics, structure and other physicochemical properties of neutral 1-phenylethanol (1OH), diphenylmethanol (2OH) and triphenylmethanol (3OH) and their corresponding deprotonated anions (oxyanions, formed by deprotonation of the OH group) are reported in this work. The standard enthalpies of formation in the gas phase at T=298.15K, ΔfHm0(g) have been determined. Quantum chemical calculations, at the DFT (particularly M05-2X method) and in some cases at the ab initio (G3) levels, have shed light on structural and electronic effects on the thermodynamic stability and intrinsic acidity of the studied compounds. 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subjects Anions
Combustion
Consistency
DFT(M05)
Enthalpy of formation
Gas phases
Intrinsic acidity
Mathematical analysis
Phenyl carbinols
Phenyls
Stability
Sublimation
Thermodynamics
title Energetics and structural properties of neutral and deprotonated phenyl carbinols
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