Piperazine, 1,4-dimethyl-

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Phase change data

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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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
BS - Robert L. Brown and Stephen E. Stein
AC - William E. Acree, Jr., James S. Chickos

Quantity Value Units Method Reference Comment
Tboil404.15KN/ALanum and Morris, 1969Uncertainty assigned by TRC = 0.3 K; TRC
Tboil403.65KN/AAroney and Le Fevre, 1960Uncertainty assigned by TRC = 1.5 K; TRC
Quantity Value Units Method Reference Comment
Tfus272.15KN/ALanum and Morris, 1969Uncertainty assigned by TRC = 0.2 K; TRC
Quantity Value Units Method Reference Comment
Δvap41.2 ± 0.4kJ/molGSEfimova, Emel'yanenko, et al., 2010Based on data from 268. to 311. K.; AC
Δvap43.8 ± 0.3kJ/molGSVerevkin, 1998Based on data from 270. to 309. K.; AC

Reduced pressure boiling point

Tboil (K) Pressure (bar) Reference Comment
404.71.00Aldrich Chemical Company Inc., 1990BS

Enthalpy of vaporization

ΔvapH (kJ/mol) Temperature (K) Method Reference Comment
44.3 ± 0.3289.GSVerevkin, 1998Based on data from 270. to 309. K.; AC
41.6291.AStephenson and Malanowski, 1987Based on data from 276. to 319. K. See also Cabani, Conti, et al., 1975.; AC

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


Gas phase ion energetics data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi

Ionization energy determinations

IE (eV) Method Reference Comment
8.77PENelsen and Buschek, 1974Vertical value

References

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Lanum and Morris, 1969
Lanum, W.J.; Morris, J.C., Physical Properties of Some Sulfur and Nitrogen Compounds, J. Chem. Eng. Data, 1969, 14, 93-8. [all data]

Aroney and Le Fevre, 1960
Aroney, M.; Le Fevre, R.J.W., Molecular polarizability. The conformation of various n-substituted anilines, piperidines, and piperazines, J. Chem. Soc., 1960, 1960, 2161. [all data]

Efimova, Emel'yanenko, et al., 2010
Efimova, Anastasia A.; Emel'yanenko, Vladimir N.; Verevkin, Sergey P.; Chernyak, Yury, Vapour pressure and enthalpy of vaporization of aliphatic poly-amines, The Journal of Chemical Thermodynamics, 2010, 42, 3, 330-336, https://doi.org/10.1016/j.jct.2009.09.003 . [all data]

Verevkin, 1998
Verevkin, Sergey P., Thermochemistry of amines: strain in six-membered rings from experimental standard molar enthalpies of formation of morpholines and piperazines, The Journal of Chemical Thermodynamics, 1998, 30, 9, 1069-1079, https://doi.org/10.1006/jcht.1998.0371 . [all data]

Aldrich Chemical Company Inc., 1990
Aldrich Chemical Company Inc., Catalog Handbook of Fine Chemicals, Aldrich Chemical Company, Inc., Milwaukee WI, 1990, 1. [all data]

Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw, Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2 . [all data]

Cabani, Conti, et al., 1975
Cabani, Sergio; Conti, G.; Giannessi, D.; Lepori, L., Thermodynamic study of aqueous dilute solutions of organic compounds. Part 3.---Morpholines and piperazines, J. Chem. Soc., Faraday Trans. 1, 1975, 71, 0, 1154, https://doi.org/10.1039/f19757101154 . [all data]

Nelsen and Buschek, 1974
Nelsen, S.F.; Buschek, J.M., Photoelectron spectra of some cyclic di- and polyamines. Lone pair-lone pair interaction in 1,3- and 1,4-diamines, J. Am. Chem. Soc., 1974, 96, 7930. [all data]


Notes

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