Cyclopentane, 1,1-dimethyl-
- Formula: C7H14
- Molecular weight: 98.1861
- IUPAC Standard InChIKey: QWHNJUXXYKPLQM-UHFFFAOYSA-N
- CAS Registry Number: 1638-26-2
- 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. - Other names: Gem-Dimethylcyclopentane; 1,1-Dimethylcyclopentane
- Permanent link for this species. Use this link for bookmarking this species for future reference.
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Gas phase thermochemistry data
Go To: Top, Gas Chromatography, 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
GT - Glushko Thermocenter, Russian Academy of Sciences, Moscow
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°gas | -33.05 ± 0.28 | kcal/mol | Cm | Johnson, Prosen, et al., 1949 | ALS |
Quantity | Value | Units | Method | Reference | Comment |
S°gas | 85.870 | cal/mol*K | N/A | Stull D.R., 1969 | This value was obtained using low temperature data of [ Gross M.E., 1953].; GT |
Constant pressure heat capacity of gas
Cp,gas (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
10.60 | 50. | Thermodynamics Research Center, 1997 | p=1 bar. Recommended values are in close agreement with those calculated by a method of increments [ Epstein M.B., 1949] at low temperatures. Discrepancies increase up to 2-4 J/mol*K at T=1500 K.; GT |
13.63 | 100. | ||
17.51 | 150. | ||
21.67 | 200. | ||
29.04 | 273.15 | ||
31.86 | 298.15 | ||
32.07 | 300. | ||
43.55 | 400. | ||
53.85 | 500. | ||
62.45 | 600. | ||
69.62 | 700. | ||
75.62 | 800. | ||
80.74 | 900. | ||
85.11 | 1000. | ||
88.84 | 1100. | ||
92.07 | 1200. | ||
94.84 | 1300. | ||
97.25 | 1400. | ||
99.33 | 1500. | ||
103.4 | 1750. | ||
106.4 | 2000. | ||
108.6 | 2250. | ||
110.3 | 2500. | ||
111.5 | 2750. | ||
112.5 | 3000. |
Gas Chromatography
Go To: Top, Gas phase thermochemistry data, 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: NIST Mass Spectrometry Data Center, William E. Wallace, director
Kovats' RI, non-polar column, isothermal
Column type | Active phase | Temperature (C) | I | Reference | Comment |
---|---|---|---|---|---|
Capillary | OV-101 | 0. | 665. | Skrbic, 1997 | |
Capillary | CP Sil 2 | 60. | 675.5 | Estel, Mohnke, et al., 1995 | 100. m/0.25 mm/0.25 μm |
Capillary | Squalane | 25. | 669. | Hilal, Carreira, et al., 1994 | |
Capillary | DB-1 | 60. | 675.9 | Krupcik, Skacani, et al., 1994 | H2; Phase thickness: 0.25 μm |
Capillary | PONA | 60. | 676.0 | Krupcik, Skacani, et al., 1994 | H2; Phase thickness: 0.5 μm |
Capillary | PONA | 60. | 676.8 | Krupcik, Skacani, et al., 1994 | H2; Phase thickness: 0.5 μm |
Capillary | DB-1 | 60. | 676.1 | Krupcik, Skacani, et al., 1994 | H2; Phase thickness: 1. μm |
Capillary | OV-101 | 60. | 675.8 | Krupcik, Skacani, et al., 1994 | H2; Phase thickness: 0.2 μm |
Capillary | OV-1 | 45. | 673.3 | Guan, Kiraly, et al., 1989 | 25. m/0.31 mm/0.52 μm, He |
Capillary | OV-1 | 65. | 677.4 | Guan, Kiraly, et al., 1989 | 25. m/0.31 mm/0.52 μm, He |
Capillary | OV-101 | 40. | 671. | Laub and Purnell, 1988 | |
Capillary | OV-101 | 60. | 675. | Laub and Purnell, 1988 | |
Capillary | OV-101 | 80. | 679. | Laub and Purnell, 1988 | |
Capillary | Squalane | 50. | 672.4 | Lunskii and Paizanskaya, 1988 | He; Column length: 50. m; Column diameter: 0.22 mm |
Capillary | Squalane | 70. | 676.5 | Lunskii and Paizanskaya, 1988 | He; Column length: 50. m; Column diameter: 0.22 mm |
Capillary | Nonpolar | 55. | 675. | Stoyanov and Dimov, 1987 | |
Capillary | Nonpolar | 60. | 676. | Stoyanov and Dimov, 1987 | |
Capillary | Nonpolar | 65. | 677. | Stoyanov and Dimov, 1987 | |
Capillary | OV-101 | 40. | 671.7 | Boneva and Dimov, 1986 | 100. m/0.27 mm/0.9 μm |
Capillary | OV-101 | 50. | 673.6 | Boneva and Dimov, 1986 | 100. m/0.27 mm/0.9 μm |
Capillary | OV-101 | 60. | 675.4 | Boneva and Dimov, 1986 | 100. m/0.27 mm/0.9 μm |
Capillary | OV-101 | 70. | 676.9 | Boneva and Dimov, 1986 | 100. m/0.27 mm/0.9 μm |
Capillary | OV-101 | 30. | 669. | Chien, Furio, et al., 1983 | |
Capillary | OV-101 | 40. | 671. | Chien, Furio, et al., 1983 | |
Capillary | OV-101 | 50. | 673. | Chien, Furio, et al., 1983 | |
Capillary | OV-101 | 60. | 675. | Chien, Furio, et al., 1983 | |
Capillary | OV-101 | 70. | 677. | Chien, Furio, et al., 1983 | |
Capillary | OV-101 | 80. | 679. | Chien, Furio, et al., 1983 | |
Capillary | DB-1 | 60. | 675.9 | Lubeck and Sutton, 1983 | Column length: 60. m; Column diameter: 0.264 mm |
Capillary | DB-1 | 60. | 676.1 | Lubeck and Sutton, 1983 | 60. m/0.259 mm/1. μm |
Capillary | OV-101 | 50. | 674. | Johansen and Ettre, 1982 | 100. m/0.27 mm/0.20 μm |
Capillary | OV-101 | 50. | 674. | Johansen and Ettre, 1982 | 55. m/0.27 mm/0.9 μm |
Capillary | SF-96 | 50. | 674. | Johansen and Ettre, 1982 | 91.4 m/0.31 mm/0.20 μm |
Capillary | Squalane | 100. | 673.2 | Lulova, Leont'eva, et al., 1976 | He; Column length: 120. m; Column diameter: 0.25 mm |
Capillary | Squalane | 100. | 673.2 | Lulova, Leont'eva, et al., 1976 | He; Column length: 120. m; Column diameter: 0.25 mm |
Capillary | Squalane | 100. | 684. | Dielmann, Schwengers, et al., 1974 | Column length: 100. m; Column diameter: 0.25 mm |
Capillary | Squalane | 60. | 675. | Dielmann, Schwengers, et al., 1974 | Column length: 100. m; Column diameter: 0.25 mm |
Capillary | Squalane | 80. | 679. | Dielmann, Schwengers, et al., 1974 | Column length: 100. m; Column diameter: 0.25 mm |
Capillary | Squalane | 50. | 674. | Rijks and Cramers, 1974 | N2; Column length: 100. m; Column diameter: 0.25 mm |
Capillary | Squalane | 70. | 677. | Rijks and Cramers, 1974 | N2; Column length: 100. m; Column diameter: 0.25 mm |
Capillary | Vacuum Grease Oil (VM-4) | 35. | 672. | Sidorov, Petrova, et al., 1972 | |
Capillary | Vacuum Grease Oil (VM-4) | 45. | 674. | Sidorov, Petrova, et al., 1972 | |
Capillary | Vacuum Grease Oil (VM-4) | 50. | 675. | Sidorov, Petrova, et al., 1972 | |
Capillary | Vacuum Grease Oil (VM-4) | 58. | 677. | Sidorov, Petrova, et al., 1972 | |
Capillary | Vacuum Grease Oil (VM-4) | 68. | 680. | Sidorov, Petrova, et al., 1972 | |
Capillary | Squalane | 70. | 674. | Dimov and Schopov, 1971 | Column length: 100. m; Column diameter: 0.25 mm |
Packed | Vacuum Grease Oil (VM-4) | 35. | 672. | Sidorov, Ivanova, et al., 1971 | |
Packed | SE-30 | 130. | 683. | Mitra and Saha, 1970 | N2, Chromosorb W; Column length: 6.1 m |
Packed | Squalane | 27. | 669. | Hively and Hinton, 1968 | He, Chromosorb P; Column length: 15. m; Column diameter: 0.25 mm |
Packed | Squalane | 49. | 674. | Hively and Hinton, 1968 | He, Chromosorb P; Column length: 15. m; Column diameter: 0.25 mm |
Packed | Squalane | 67. | 677. | Hively and Hinton, 1968 | He, Chromosorb P; Column length: 15. m; Column diameter: 0.25 mm |
Packed | Squalane | 86. | 681. | Hively and Hinton, 1968 | He, Chromosorb P; Column length: 15. m; Column diameter: 0.25 mm |
Capillary | Squalane | 70. | 677. | Schomburg, 1966 |
Kovats' RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | Apiezon L | 679. | Louis, 1971 | N2, 1. K/min; Column length: 50. m; Column diameter: 0.25 mm; Tstart: 60. C |
Kovats' RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | Petrocol DH-100 | 671.1 | Haagen-Smit Laboratory, 1997 | He; Column length: 100. m; Column diameter: 0.2 mm; Program: 5C(10min) => 5C/min => 50C(48min) => 1.5C/min => 195C(91min) |
Van Den Dool and Kratz RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | Petrocol DH | 669.7 | Censullo, Jones, et al., 2003 | 50. m/0.25 mm/0.5 μm, He, 35. C @ 10. min, 3. K/min, 200. C @ 10. min |
Capillary | SPB-1 | 662.30 | LECO Corporation, 2003 | 30. m/0.25 mm/0.25 μm, 40. C @ 2. min, 10. K/min, 250. C @ 2. min |
Capillary | SPB-1 | 663.04 | LECO Corporation, 2003 | 30. m/0.25 mm/0.25 μm, 40. C @ 2. min, 10. K/min, 250. C @ 2. min |
Capillary | OV-101 | 668.5 | Yin, Liu, et al., 2001 | N2, 1. K/min; Column length: 80. m; Column diameter: 0.22 mm; Tstart: 30. C; Tend: 130. C |
Capillary | Petrocol DH | 665.52 | Subramaniam, Bochniak, et al., 1994 | 100. m/0.25 mm/0.5 μm, He, 1. K/min; Tstart: 30. C; Tend: 220. C |
Capillary | Petrocol DH | 665.59 | Subramaniam, Bochniak, et al., 1994 | 100. m/0.25 mm/0.5 μm, He, 1. K/min; Tstart: 30. C; Tend: 220. C |
Capillary | Petrocol DH | 665.48 | White, Douglas, et al., 1992 | 100. m/0.25 mm/0.5 μm, He, 1. K/min; Tstart: 30. C; Tend: 220. C |
Capillary | Petrocol DH | 665.63 | White, Douglas, et al., 1992 | 100. m/0.25 mm/0.5 μm, He, 1. K/min; Tstart: 30. C; Tend: 220. C |
Capillary | Petrocol DH | 666. | White, Hackett, et al., 1992 | 100. m/0.25 mm/0.5 μm, He, 1. K/min; Tstart: 30. C; Tend: 220. C |
Normal alkane RI, non-polar column, isothermal
Column type | Active phase | Temperature (C) | I | Reference | Comment |
---|---|---|---|---|---|
Capillary | OV-101 | 40. | 672. | Li and Deng, 1998 | N2; Column length: 51. m; Column diameter: 0.25 mm |
Capillary | OV-101 | 50. | 673. | Wu and Lu, 1984 | |
Capillary | OV-101 | 70. | 677. | Wu and Lu, 1984 | |
Capillary | Squalane | 86. | 671. | Vigdergauz and Martynov, 1971 | He; Column length: 150. m; Column diameter: 0.35 mm |
Normal alkane RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | Polydimethyl siloxane: CP-Sil 5 CB | 672. | Bramston-Cook, 2013 | 60. m/0.25 mm/1.0 μm, Helium, 45. C @ 1.45 min, 3.6 K/min, 210. C @ 2.72 min |
Capillary | Petrocol DH | 666. | Supelco, 2012 | 100. m/0.25 mm/0.50 μm, Helium, 20. C @ 15. min, 15. K/min, 220. C @ 30. min |
Capillary | PONA | 670. | Zhang, Ding, et al., 2009 | 50. m/0.20 mm/0.50 μm, Nitrogen, 35. C @ 15. min, 2. K/min, 200. C @ 10. min |
Capillary | OV-101 | 673. | Orav, Kailas, et al., 1999 | 50. m/0.20 mm/0.50 μm, Helium, 30. C @ 6. min, 1. K/min; Tend: 100. C |
Capillary | SE-54 | 669. | Guan, Li, et al., 1995 | 60. C @ 2. min, 4. K/min; Column length: 50. m; Column diameter: 0.32 mm; Tend: 200. C |
Normal alkane RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | Squalane | 669. | Chen, 2008 | Program: not specified |
Capillary | Squalane | 683. | Chen, 2008 | Program: not specified |
Capillary | Methyl Silicone | 673. | Zenkevich and Marinichev, 2001 | Program: not specified |
Capillary | OV-101 | 665. | Skrbic and Cvejanov, 1993 | Program: not specified |
Capillary | OV-1, SE-30, Methyl silicone, SP-2100, OV-101, DB-1, etc. | 675. | Waggott and Davies, 1984 | Hydrogen; Column length: 50. m; Column diameter: 0.32 mm; Program: not specified |
References
Go To: Top, Gas phase thermochemistry data, Gas Chromatography, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Johnson, Prosen, et al., 1949
Johnson, W.H.; Prosen, E.J.; Rossini, F.D.,
Heats of combustion and isomerization of the six C7H14 alkylcyclopentanes,
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The Chemical Thermodynamics of Organic Compounds. Wiley, New York, 1969. [all data]
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Low-temperature thermal data for some C7H14 alkylcyclopentanes,
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Unified retention concept -- statistical treatment of Kováts retention index,
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Specific retention volumes, retention indices, and family-plot regressions of aliphatic, alicyclic, and aromatic hydrocarbon solutes with OV-101 poly (dimethylsiloxane) stationary phase,
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Notes
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- Symbols used in this document:
Cp,gas Constant pressure heat capacity of gas S°gas Entropy of gas at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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