Carbon

Formula: C₅
Molecular weight: 60.0535
IUPAC Standard InChI: InChI=1S/C5/c1-3-5-4-2
IUPAC Standard InChIKey: UNLWJHHUOPHOHT-UHFFFAOYSA-N
CAS Registry Number: 12595-82-3
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.
Permanent link for this species. Use this link for bookmarking this species for future reference.
Information on this page:
Other data available:
- Gas phase thermochemistry data
Options:
- Switch to calorie-based units

Gas phase ion energetics data

Data compiled as indicated in comments:
LL - Sharon G. Lias and Joel F. Liebman
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess

View reactions leading to C₅⁺ (ion structure unspecified)

Electron affinity determinations

EA (eV)	Method	Reference	Comment
2.853871 ± 0.000062	N/A	Hock, Kim, et al., 2012	B
2.840 ± 0.030	LPES	Wang, Averkiev, et al., 2010	Stated electron affinity is the Vertical Detachment Energy; B
2.8390 ± 0.0080	LPES	Arnold, Bradforth, et al., 1991	Linear structure for both neutral and anion; B
2.8530 ± 0.0010	LPD	Kitsopoulos, Chick, et al., 1991	B
2.80 ± 0.10	LPES	Yang, Taylor, et al., 1989	EA given is Vertical Detachment Energy. probably linear structure.; B
<2.33 ± 0.10	LPD	Vager, Feldman, et al., 1991	Cyclic isomer, by Coulomb explosion, Zhao, de Beer, et al., 1996 claims hot ions are the source.; B

Ionization energy determinations

IE (eV)	Method	Reference	Comment
12.3 ± 0.1	PE	Ramathan, Zimmerman, et al., 1993	LL
12.7 ± 0.5	EI	Dibeler, Reese, et al., 1961	RDSH
13. ± 1.	EI	Drowart, Burns, et al., 1959	RDSH

References

Go To: Top, Gas phase ion energetics data, Notes

Hock, Kim, et al., 2012
Hock, C.; Kim, J.B.; Weichman, M.L.; Yacovitch, T.I.; Neumark, D.M., Slow photoelectron velocity-map imaging spectroscopy of cold negative ions, J. Chem. Phys., 2012, 137, 24, 244201, https://doi.org/10.1063/1.4772406 . [all data]

Wang, Averkiev, et al., 2010
Wang, L.M.; Averkiev, B.B.; Ramilowski, J.A.; Huang, W.; Wang, L.S.; Boldyrev, A.I., Planar to Linear Structural Transition in Small Boron-Carbon Mixed Clusters: CxB5-x- (x=1-5), J. Am. Chem. Soc., 2010, 132, 40, 14104-14112, https://doi.org/10.1021/ja103846q . [all data]

Arnold, Bradforth, et al., 1991
Arnold, D.W.; Bradforth, S.E.; Kitsopoulos, T.N.; Neumark, D.M., Vibrationally Resolved Spectra of C2-C11 by Anion Photoelectron Spectroscopy, J. Chem. Phys., 1991, 95, 12, 8753, https://doi.org/10.1063/1.461211 . [all data]

Kitsopoulos, Chick, et al., 1991
Kitsopoulos, T.N.; Chick, C.J.; Zhao, Y.; Neumark, D.M., Threshold Photodetachment Spectroscopy of C-5(-), J. Chem. Phys., 1991, 95, 7, 5479, https://doi.org/10.1063/1.461664 . [all data]

Yang, Taylor, et al., 1989
Yang, S.; Taylor, K.J.; Craycraft, M.J.; Conceicao, J.; Pettiette, C.L.; Cherhnovsky, O.; Smalley, R.E., UPS of 2-30 Atom Carbon Clusters: Chains and Rings, Chem. Phys. Lett., 1989, 144, 5-6, 431, https://doi.org/10.1016/0009-2614(88)87291-9 . [all data]

Vager, Feldman, et al., 1991
Vager, Z.; Feldman, H.; Kella, D.; Malkin, E.; Miklazky, E.; Zajfman, J.; Naaman, R., The Structure of Small Carbon Clusters, Z. Phys. D, 1991, 19, 1-4, 413, https://doi.org/10.1007/BF01448341 . [all data]

Zhao, de Beer, et al., 1996
Zhao, Y.; de Beer, E.; Xu, C.; Taylor, T.; Neumark, D.M., Spectroscopy and Electron Detachment Dynamics of C4-, C6- and C8-, J. Chem. Phys., 1996, 105, 12, 4905, https://doi.org/10.1063/1.472341 . [all data]

Ramathan, Zimmerman, et al., 1993
Ramathan, R.; Zimmerman, J.A.; Eyler, J.R., Ionization potentials of small carbon clusters, J. Chem. Phys., 1993, 98, 7838. [all data]

Dibeler, Reese, et al., 1961
Dibeler, V.H.; Reese, R.M.; Franklin, J.L., Mass spectrometric study of cyanogen and cyanoacetylenes, J. Am. Chem. Soc., 1961, 83, 1813. [all data]

Drowart, Burns, et al., 1959
Drowart, J.; Burns, R.P.; DeMaria, G.; Inghram, M.G., Mass spectrometric study of carbon vapor, J. Chem. Phys., 1959, 31, 1131. [all data]

Notes

Go To: Top, Gas phase ion energetics data, References

Symbols used in this document:

EA Electron affinity
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.