The enthalpy of formation of methionine revisited

María Victoria Roux; Rafael Notario; Marta Segura; James S. Chickos; Joel F. Liebman

doi:10.1002/poc.2961

The enthalpy of formation of methionine revisited

María Victoria Roux, Rafael Notario, Marta Segura, James S. Chickos, Joel F. Liebman

University of Missouri-St. Louis

Research output: Contribution to journal › Article › peer-review

Abstract

<div class="line" id="line-7"> <span style='color: rgb(28, 29, 30); font-family: "Open Sans", icomoon, sans-serif; font-size: 16px;'> Methionine (2&hyphen;amino&hyphen;4&hyphen;(methylthio)butanoic acid) is a sulfur&hyphen;containing essential α&hyphen;amino acid. Despite its importance, its enthalpy of formation is contentious. From the analysis of its polymorphism confirms that the previously reported calorimetric experiments were made in the temperature interval in which a phase transitions occurs. A new value for the enthalpy of formation is suggested based on these results, as well as G4 quantum chemical calculations and thermochemical estimates. From the analysis of experimental enthalpy of formation measurements, the group increment temperature adjusted enthalpy of sublimation, quantum chemical calculations, and difference quantity derived estimates, our recommended value for the gas phase enthalpy of formation of methionine is –(430 ± 10) kJ·mol </span> <span style='color: rgb(28, 29, 30); font-family: "Open Sans", icomoon, sans-serif; font-size: 12px;'> −1 </span> <span style='color: rgb(28, 29, 30); font-family: "Open Sans", icomoon, sans-serif; font-size: 16px;'> . Copyright © 2012 John Wiley & Sons, Ltd. </span></div>

Original language	American English
Journal	Journal of Physical Organic Chemistry
Volume	25
DOIs	https://doi.org/10.1002/poc.2961
State	Published - Jan 11 2012

Disciplines

Chemistry
Physical Chemistry

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title = "The enthalpy of formation of methionine revisited",

abstract = " Methionine (2&hyphen;amino&hyphen;4&hyphen;(methylthio)butanoic acid) is a sulfur&hyphen;containing essential α&hyphen;amino acid. Despite its importance, its enthalpy of formation is contentious. From the analysis of its polymorphism confirms that the previously reported calorimetric experiments were made in the temperature interval in which a phase transitions occurs. A new value for the enthalpy of formation is suggested based on these results, as well as G4 quantum chemical calculations and thermochemical estimates. From the analysis of experimental enthalpy of formation measurements, the group increment temperature adjusted enthalpy of sublimation, quantum chemical calculations, and difference quantity derived estimates, our recommended value for the gas phase enthalpy of formation of methionine is –(430 ± 10) kJ·mol −1 . Copyright © 2012 John Wiley & Sons, Ltd. ",

author = "Roux, {Mar{\'i}a Victoria} and Rafael Notario and Marta Segura and Chickos, {James S.} and Liebman, {Joel F.}",

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T1 - The enthalpy of formation of methionine revisited

AU - Roux, María Victoria

AU - Notario, Rafael

AU - Segura, Marta

AU - Chickos, James S.

AU - Liebman, Joel F.

N1 - Enter your email address below. If your address has been previously registered, you will receive an email with instructions on how to reset your password. If you don't receive an email, you should register as a new user

PY - 2012/1/11

Y1 - 2012/1/11

N2 - Methionine (2&hyphen;amino&hyphen;4&hyphen;(methylthio)butanoic acid) is a sulfur&hyphen;containing essential α&hyphen;amino acid. Despite its importance, its enthalpy of formation is contentious. From the analysis of its polymorphism confirms that the previously reported calorimetric experiments were made in the temperature interval in which a phase transitions occurs. A new value for the enthalpy of formation is suggested based on these results, as well as G4 quantum chemical calculations and thermochemical estimates. From the analysis of experimental enthalpy of formation measurements, the group increment temperature adjusted enthalpy of sublimation, quantum chemical calculations, and difference quantity derived estimates, our recommended value for the gas phase enthalpy of formation of methionine is –(430 ± 10) kJ·mol −1 . Copyright © 2012 John Wiley & Sons, Ltd.

AB - Methionine (2&hyphen;amino&hyphen;4&hyphen;(methylthio)butanoic acid) is a sulfur&hyphen;containing essential α&hyphen;amino acid. Despite its importance, its enthalpy of formation is contentious. From the analysis of its polymorphism confirms that the previously reported calorimetric experiments were made in the temperature interval in which a phase transitions occurs. A new value for the enthalpy of formation is suggested based on these results, as well as G4 quantum chemical calculations and thermochemical estimates. From the analysis of experimental enthalpy of formation measurements, the group increment temperature adjusted enthalpy of sublimation, quantum chemical calculations, and difference quantity derived estimates, our recommended value for the gas phase enthalpy of formation of methionine is –(430 ± 10) kJ·mol −1 . Copyright © 2012 John Wiley & Sons, Ltd.

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U2 - 10.1002/poc.2961

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M3 - Article

VL - 25

JO - Journal of Physical Organic Chemistry

JF - Journal of Physical Organic Chemistry

ER -

The enthalpy of formation of methionine revisited

Abstract

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