Valine, protonated

Formula: C₅H₁₂NO₂⁺
Molecular weight: 118.1537
Information on this page:
Other data available:
- Ion clustering data
Options:
- Switch to SI units

Reaction thermochemistry data

Data compiled by: Michael M. Meot-Ner (Mautner) and Sharon G. Lias

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

C₅H₁₂NO₂⁺ + = (C₅H₁₂NO₂⁺ • )

By formula: C₅H₁₂NO₂⁺ + H₂O = (C₅H₁₂NO₂⁺ • H₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	19.3	kcal/mol	PHPMS	Meot-Ner and Field, 1974	gas phase; Entropy change is questionable
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	36.3	cal/mol*K	PHPMS	Meot-Ner and Field, 1974	gas phase; Entropy change is questionable

C₅H₁₂NO₂⁺ + = (C₅H₁₂NO₂⁺ • )

By formula: C₅H₁₂NO₂⁺ + H₃N = (C₅H₁₂NO₂⁺ • H₃N)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	20.9	kcal/mol	PHPMS	Meot-Ner and Field, 1974	gas phase
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	28.8	cal/mol*K	PHPMS	Meot-Ner and Field, 1974	gas phase

C₅H₁₂NO₂⁺ + = (C₅H₁₂NO₂⁺ • )

By formula: C₅H₁₂NO₂⁺ + CH₃NO₂ = (C₅H₁₂NO₂⁺ • CH₃NO₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	19.8	kcal/mol	HPMS	Meot-Ner and Field, 1974	gas phase
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	27.8	cal/mol*K	HPMS	Meot-Ner and Field, 1974	gas phase

C₅H₁₂NO₂⁺ + = (C₅H₁₂NO₂⁺ • )

By formula: C₅H₁₂NO₂⁺ + C₅H₁₁NO₂ = (C₅H₁₂NO₂⁺ • C₅H₁₁NO₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	20.7	kcal/mol	PHPMS	Meot-Ner and Field, 1974	gas phase

References

Go To: Top, Reaction thermochemistry data, Notes

Meot-Ner and Field, 1974
Meot-Ner, (Mautner); Field, F.H., Solvation and Association of Protonated Gaseous Amino Acids, J. Am. Chem. Soc., 1974, 96, 10, 3168, https://doi.org/10.1021/ja00817a024 . [all data]

Notes

Go To: Top, Reaction thermochemistry data, References

Symbols used in this document:

Δ_rH° Enthalpy of reaction at standard conditions

Δ_rS° Entropy of reaction at standard conditions
Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
Customer support for NIST Standard Reference Data products.

Δ_rH°	Enthalpy of reaction at standard conditions
Δ_rS°	Entropy of reaction at standard conditions