Pyridine, 3,4-dimethyl-
- Formula: C7H9N
- Molecular weight: 107.1531
- IUPAC Standard InChI: InChI=1S/C7H9N/c1-6-3-4-8-5-7(6)2/h3-5H,1-2H3
- IUPAC Standard InChIKey: NURQLCJSMXZBPC-UHFFFAOYSA-N
- CAS Registry Number: 583-58-4
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
View 3d structure (requires JavaScript / HTML 5) - Other names: 3,4-Lutidine; 3,4-Dimethylpyridine; 3,4-Lutidene
- Permanent link for this species. Use this link for bookmarking this species for future reference.
- Information on this page:
- Other data available:
- Options:
Data at NIST subscription sites:
NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.
Gas phase thermochemistry data
Go To: Top, Condensed phase thermochemistry data, IR Spectrum, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: Donald R. Burgess, Jr.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | 16.7 | kcal/mol | N/A | Cox and Gundry, 1958 | Value computed using ΔfHliquid° value of 18.2 kj/mol from Cox and Gundry, 1958 and ΔvapH° value of 51.8 kj/mol from missing citation. |
Condensed phase thermochemistry data
Go To: Top, Gas phase thermochemistry data, IR Spectrum, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
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 |
|---|---|---|---|---|---|
| ΔfH°liquid | 4.35 | kcal/mol | Ccb | Cox and Gundry, 1958 | ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°liquid | -970.14 | kcal/mol | Ccb | Cox and Gundry, 1958 | ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid | 57.533 | cal/mol*K | N/A | Steele, Chirico, et al., 1986 | DH |
Constant pressure heat capacity of liquid
| Cp,liquid (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 45.851 | 298.15 | Steele, Chirico, et al., 1986 | T = 10 to 450 K.; DH |
| 46.8 | 298. | Podoski, Rachwalska, et al., 1984 | T = 265 to 380 K. Data graphically only. Value given is estimated from graph.; DH |
IR Spectrum
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, References, Notes
Data compiled by: Coblentz Society, Inc.
- SOLUTION (10% CCl4 FOR 3800-1330, 10% CS2 FOR 1330-450 CM-1) $$ STRUCTURE VERIFIED BY SOLUTION SPECTRUM FROM ROY WARD, BRITISH PETROLEUM CHEMICALS INTERNATIONAL, LTD.; DOW KBr FOREPRISM-GRATING; DIGITIZED BY COBLENTZ SOCIETY (BATCH I) FROM HARD COPY; 2 cm-1 resolution
- SOLUTION (10% CCl4 FOR 5000-1330, 10% CS2 FOR 1330-625 CM-1) $$ SALT ADDED TO BOTH SOLUTIONS; Not specified, most likely a prism, grating, or hybrid spectrometer.; DIGITIZED BY NIST FROM HARD COPY; 4 cm-1 resolution
- VAPOR (0.5 MICROLITER AT 150 C); NICOLET FTIR; DIGITIZED BY NIST FROM HARD COPY (FROM TWO SEGMENTS); 4 CM-1 cm-1 resolution
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, IR Spectrum, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Cox and Gundry, 1958
Cox, J.D.; Gundry, H.A.,
Heats of combustion. Part II. The six lutidines,
J. Chem. Soc., 1958, 1019-1022. [all data]
Steele, Chirico, et al., 1986
Steele, W.V.; Chirico, R.D.; Collier, W.B.; Hossenlopp, I.A.; Nguyen, A.; Strube, M.M.,
Thermochemical and thermophysical properties of organic nitrogen compounds found in fossil materials,
NIPER Report, 1986, 188, 112p. [all data]
Podoski, Rachwalska, et al., 1984
Podoski, T.; Rachwalska, M.; Mayer, J.,
The study of specific heat of liquid 3,4-dimethylpyridine by the adiabatic calorimetry method,
Physica B (Amsterdam), 1984, 125(2), 215-218. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, IR Spectrum, References
- Symbols used in this document:
Cp,liquid Constant pressure heat capacity of liquid S°liquid Entropy of liquid at standard conditions ΔcH°liquid Enthalpy of combustion of liquid at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°liquid Enthalpy of formation of liquid 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.