Cyclobutane

Formula: C₄H₈
Molecular weight: 56.1063
IUPAC Standard InChI: InChI=1S/C4H8/c1-2-4-3-1/h1-4H2
IUPAC Standard InChIKey: PMPVIKIVABFJJI-UHFFFAOYSA-N
CAS Registry Number: 287-23-0
Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript.
Isotopologues:
- Cyclobutane-d8
Other names: Tetramethylene; UN 2601
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Information on this page:
Other data available:
Data at other public NIST sites:
- Microwave spectra (on physics lab web site)
- Gas Phase Kinetics Database
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Gas phase thermochemistry data

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Data compiled by: Glushko Thermocenter, Russian Academy of Sciences, Moscow

Constant pressure heat capacity of gas

C_p,gas (J/mol*K)	Temperature (K)	Reference	Comment
34.15	50.	Dorofeeva O.V., 1986	Discrepancies between selected values and those calculated earlier [ Rathjens G.W., 1953] increase as the temperature increases and amount to 5.4 and 3.1 J/mol*K for S(1500 K) and Cp(1500 K), respectively.
38.19	100.
42.28	150.
48.84	200.
64.23	273.15
70.6 ± 1.5	298.15
71.05	300.
97.67	400.
122.03	500.
142.64	600.
159.92	700.
174.52	800.
186.99	900.
197.67	1000.
206.85	1100.
214.76	1200.
221.59	1300.
227.50	1400.
232.62	1500.

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_cH°_liquid	-2720.4 ± 0.5	kJ/mol	Ccb	Kaarsemaker and Coops, 1952	Corresponding Δ_fHº_liquid = 3.0 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS
Δ_cH°_liquid	-2720.5 ± 0.4	kJ/mol	Ccb	Coops and Kaarsemaker, 1950	Corresponding Δ_fHº_liquid = 3.1 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS
Quantity	Value	Units	Method	Reference	Comment
S°_liquid	175.15	J/mol*K	N/A	Rathjens and Gwinn, 1953	DH

Constant pressure heat capacity of liquid

C_p,liquid (J/mol*K)	Temperature (K)	Reference	Comment
106.32	285.	Rathjens and Gwinn, 1953	T = 15 to 285 K.; DH

Phase change data

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Data compiled as indicated in comments:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing
AC - William E. Acree, Jr., James S. Chickos
CAL - James S. Chickos, William E. Acree, Jr., Joel F. Liebman, Students of Chem 202 (Introduction to the Literature of Chemistry), University of Missouri -- St. Louis

Quantity	Value	Units	Method	Reference	Comment
T_boil	284. ± 5.	K	AVG	N/A	Average of 9 values; Individual data points
Quantity	Value	Units	Method	Reference	Comment
T_fus	183.0	K	N/A	Kaarsemaker and Coops, 1952	Uncertainty assigned by TRC = 1. K; TRC
T_fus	193.	K	N/A	Willstatter and Bruce, 1907	Uncertainty assigned by TRC = 3. K; TRC
T_fus	273.14	K	N/A	Willstatter and Bruce, 1907	Uncertainty assigned by TRC = 3. K; TRC
Quantity	Value	Units	Method	Reference	Comment
T_triple	182.4 ± 0.6	K	AVG	N/A	Average of 12 values; Individual data points
Quantity	Value	Units	Method	Reference	Comment
Δ_vapH°	23.92	kJ/mol	N/A	Majer and Svoboda, 1985
Δ_vapH°	23.2	kJ/mol	V	Kaarsemaker and Coops, 1952	ALS
Δ_vapH°	23.3 ± 0.4	kJ/mol	V	Coops and Kaarsemaker, 1950	ALS

Enthalpy of vaporization

Δ_vapH (kJ/mol)	Temperature (K)	Method	Reference	Comment
24.188	285.66	N/A	Rathjens and Gwinn, 1953	P = 101.325 kPa; DH
24.19	285.7	N/A	Majer and Svoboda, 1985
25.2	272.	A	Stephenson and Malanowski, 1987	Based on data from 198. to 287. K.; AC
5.781	559.	C	Rathjens and Gwinn, 1953, 2	ALS
25.2	270.	N/A	Rathjens and Gwinn, 1953	Based on data from 217. to 285. K. See also Boublik, Fried, et al., 1984.; AC

Entropy of vaporization

Δ_vapS (J/mol*K)	Temperature (K)	Reference	Comment
84.67	285.66	Rathjens and Gwinn, 1953	P; DH

Antoine Equation Parameters

log₁₀(P) = A − (B / (T + C))
P = vapor pressure (bar)
T = temperature (K)

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Temperature (K)	A	B	C	Reference	Comment
213.22 to 285.34	4.07143	1038.009	-30.334	Rathjens and Gwinn, 1953	Coefficents calculated by NIST from author's data.

Enthalpy of sublimation

Δ_subH (kJ/mol)	Temperature (K)	Method	Reference	Comment
36.4	145.	B	Bondi, 1963	AC

Enthalpy of fusion

Δ_fusH (kJ/mol)	Temperature (K)	Reference	Comment
1.09	182.4	Domalski and Hearing, 1996	AC

Entropy of fusion

Δ_fusS (J/mol*K)	Temperature (K)	Reference	Comment
39.17	145.7	Domalski and Hearing, 1996	CAL
5.96	182.4	Domalski and Hearing, 1996	CAL

Enthalpy of phase transition

ΔH_trs (kJ/mol)	Temperature (K)	Initial Phase	Final Phase	Reference	Comment
5.707	145.7	crystaline, II	crystaline, I	Rathjens and Gwinn, 1953	Transition over about 120 to 145.7 K. Values represent excess over extrapolated Cp curves.; DH
1.088	182.42	crystaline, I	liquid	Rathjens and Gwinn, 1953	DH

Entropy of phase transition

ΔS_trs (J/mol*K)	Temperature (K)	Initial Phase	Final Phase	Reference	Comment
39.17	145.7	crystaline, II	crystaline, I	Rathjens and Gwinn, 1953	Transition; DH
5.96	182.42	crystaline, I	liquid	Rathjens and Gwinn, 1953	DH

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:

References

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Dorofeeva O.V., 1986
Dorofeeva O.V., Thermodynamic properties of twenty-one monocyclic hydrocarbons, J. Phys. Chem. Ref. Data, 1986, 15, 437-464. [all data]

Rathjens G.W., 1953
Rathjens G.W., Jr., Infrared absorption spectra, structure and thermodynamic properties of cyclobutane, J. Am. Chem. Soc., 1953, 75, 5634-5642. [all data]

Kaarsemaker and Coops, 1952
Kaarsemaker, S.; Coops, J., Thermal quantities of some cycloparaffins. Part III. Results of measurements, Rec. Trav. Chim. Pays/Bas, 1952, 71, 261. [all data]

Coops and Kaarsemaker, 1950
Coops, J.; Kaarsemaker, SJ., Heat of combustion of cyclobutane, Recl. Trav. Chim. Pays-Bas, 1950, 69, 1364. [all data]

Rathjens and Gwinn, 1953
Rathjens, G.W., Jr.; Gwinn, W.D., Heat capacities and entropy of cyclobutane, J. Am. Chem. Soc., 1953, 75, 5629-5633. [all data]

Willstatter and Bruce, 1907
Willstatter, R.; Bruce, J., Chem. Ber., 1907, 40, 3979. [all data]

Majer and Svoboda, 1985
Majer, V.; Svoboda, V., Enthalpies of Vaporization of Organic Compounds: A Critical Review and Data Compilation, Blackwell Scientific Publications, Oxford, 1985, 300. [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]

Rathjens and Gwinn, 1953, 2
Rathjens, G.W., Jr.; Gwinn, W.D., Heat capacities and entropy of cyclobutane, J. Am. Chem. Soc., 1953, 75, 5629-56. [all data]

Boublik, Fried, et al., 1984
Boublik, T.; Fried, V.; Hala, E., The Vapour Pressures of Pure Substances: Selected Values of the Temperature Dependence of the Vapour Pressures of Some Pure Substances in the Normal and Low Pressure Region, 2nd ed., Elsevier, New York, 1984, 972. [all data]

Bondi, 1963
Bondi, A., Heat of Siblimation of Molecular Crystals: A Catalog of Molecular Structure Increments., J. Chem. Eng. Data, 1963, 8, 3, 371-381, https://doi.org/10.1021/je60018a027 . [all data]

Domalski and Hearing, 1996
Domalski, Eugene S.; Hearing, Elizabeth D., Heat Capacities and Entropies of Organic Compounds in the Condensed Phase. Volume III, J. Phys. Chem. Ref. Data, 1996, 25, 1, 1, https://doi.org/10.1063/1.555985 . [all data]

Notes

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Symbols used in this document:

C_p,gas	Constant pressure heat capacity of gas
C_p,liquid	Constant pressure heat capacity of liquid
S°_liquid	Entropy of liquid at standard conditions
T_boil	Boiling point
T_fus	Fusion (melting) point
T_triple	Triple point temperature
ΔH_trs	Enthalpy of phase transition
ΔS_trs	Entropy of phase transition
Δ_cH°_liquid	Enthalpy of combustion of liquid at standard conditions
Δ_fusH	Enthalpy of fusion
Δ_fusS	Entropy of fusion
Δ_subH	Enthalpy of sublimation
Δ_vapH	Enthalpy of vaporization
Δ_vapH°	Enthalpy of vaporization at standard conditions
Δ_vapS	Entropy of vaporization

Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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