Pyridine, 2-methyl-

Formula: C₆H₇N
Molecular weight: 93.1265
IUPAC Standard InChI: InChI=1S/C6H7N/c1-6-4-2-3-5-7-6/h2-5H,1H3
IUPAC Standard InChIKey: BSKHPKMHTQYZBB-UHFFFAOYSA-N
CAS Registry Number: 109-06-8
Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
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Other names: 2-Picoline; α-Methylpyridine; α-Picoline; o-Picoline; 2-Methylpyridine; Picoline, α; Rcra waste number U191; o-Methylpyridine; NSC 3409
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Condensed phase thermochemistry data

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Data compiled as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity	Value	Units	Method	Reference	Comment
Δ_fH°_liquid	-16.49	kcal/mol	Ccb	Kosorotov, Zemlyakova, et al., 1978	impure compound; ALS
Δ_fH°_liquid	13.50 ± 0.18	kcal/mol	Ccb	Scott, Hubbard, et al., 1963	ALS
Δ_fH°_liquid	14.10 ± 0.31	kcal/mol	Ccb	Cox, Challoner, et al., 1954	ALS
Δ_fH°_liquid	10.82	kcal/mol	Ccb	Constam and White, 1903	ALS
Quantity	Value	Units	Method	Reference	Comment
Δ_cH°_liquid	-786.91	kcal/mol	Ccb	Kosorotov, Zemlyakova, et al., 1978	impure compound; ALS
Δ_cH°_liquid	-816.92 ± 0.16	kcal/mol	Ccb	Scott, Hubbard, et al., 1963	ALS
Δ_cH°_liquid	-817.52 ± 0.31	kcal/mol	Ccb	Cox, Challoner, et al., 1954	ALS
Δ_cH°_liquid	-816.1	kcal/mol	Ccb	Constam and White, 1903	ALS
Quantity	Value	Units	Method	Reference	Comment
S°_liquid	52.070	cal/mol*K	N/A	Scott, Hubbard, et al., 1963	DH

Constant pressure heat capacity of liquid

C_p,liquid (cal/mol*K)	Temperature (K)	Reference	Comment
37.861	298.15	Scott, Hubbard, et al., 1963	T = 12 to 370 K.; DH

IR Spectrum

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Data compiled by: Coblentz Society, Inc.

VAPOR (0.5 MICROLITER AT 150 C); NICOLET FTIR; DIGITIZED BY NIST FROM HARD COPY (FROM TWO SEGMENTS); 4 CM^-1 cm^-1 resolution

Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director

References

Go To: Top, Condensed phase thermochemistry data, IR Spectrum, Notes

Kosorotov, Zemlyakova, et al., 1978
Kosorotov, V.I.; Zemlyakova, Z.F.; Platonov, V.A.; Ovchinnikov, V.G.; Simulin, Yu.N.; Dzhagatspanyan, R.V., Determination of thermal effects of the synthesis of chloropicolines and chloroaminopicolines, J. Appl. Chem. USSR (Engl. Transl.), 1978, 51, 2262-2263, In original 2376. [all data]

Scott, Hubbard, et al., 1963
Scott, D.W.; Hubbard, W.N.; Messerly, J.F.; Todd, S.S.; Hossenlopp, I.A.; Good, W.D.; Douslin, D.R.; McCullough, J.P., Chemical thermodynamic properties and internal rotation of methylpyridines. I. 2-methylpyridine, J. Phys. Chem., 1963, 67, 680-685. [all data]

Cox, Challoner, et al., 1954
Cox, J.D.; Challoner, A.R.; Meetham, A.R., The heats of combustion of pyridine and certain of its derivatives, J. Chem. Soc., 1954, 265-271. [all data]

Constam and White, 1903
Constam, E.J.; White, J., Physico-chemical investigations in the pyridine series, Am. Chem. J., 1903, 29, 1-49. [all data]

Notes

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Symbols used in this document:

C_p,liquid	Constant pressure heat capacity of liquid
S°_liquid	Entropy of liquid at standard conditions
Δ_cH°_liquid	Enthalpy of combustion of liquid at standard conditions
Δ_fH°_liquid	Enthalpy of formation of liquid at standard conditions

Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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