Tribromomethyl radical

Formula: CBr₃
Molecular weight: 251.723
IUPAC Standard InChI: InChI=1S/CBr3/c2-1(3)4
IUPAC Standard InChIKey: ROWMQJJMCWDJDT-UHFFFAOYSA-N
CAS Registry Number: 4471-18-5
Chemical structure:
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Gas phase ion energetics data

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Data compiled as indicated in comments:
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
B - John E. Bartmess

View reactions leading to CBr₃⁺ (ion structure unspecified)

Quantity	Value	Units	Method	Reference	Comment
Δ_fH°_{(+) ion}	231.	kcal/mol	N/A	N/A

Electron affinity determinations

EA (eV)	Method	Reference	Comment
2.57 ± 0.12	D-EA	Born, Ingemann, et al., 2000	B
1.73 ± 0.18	SI	Page and Goode, 1969	The Magnetron method, lacking mass analysis, is not considered reliable.; B

Ionization energy determinations

IE (eV)	Method	Reference	Comment
7.5 ± 0.2	EI	Kime, Driscoll, et al., 1987	LBLHLM

Vibrational and/or electronic energy levels

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Data compiled by: Marilyn E. Jacox

State: X

Vib. sym.	No.	Approximate type of mode	cm^-1		Med.	Method	References


e	3	CBr stretch	773	vs	Ar	IR	Andrews, 1968 Andrews and Carver, 1968 Rogers, Abramowitz, et al., 1970

Additional references: Jacox, 1994, page 218

Notes

Very strong

References

Go To: Top, Gas phase ion energetics data, Vibrational and/or electronic energy levels, Notes

Born, Ingemann, et al., 2000
Born, M.; Ingemann, S.; Nibbering, N.M.M., Thermochemical properties of halogen-substituted methanes, methyl radicals, and carbenes in the gas phase, Int. J. Mass Spectrom., 2000, 194, 2-3, 103-113, https://doi.org/10.1016/S1387-3806(99)00125-6 . [all data]

Page and Goode, 1969
Page, F.M.; Goode, G.C., Negative Ions and the Magnetron., Wiley, NY, 1969. [all data]

Kime, Driscoll, et al., 1987
Kime, Y.J.; Driscoll, D.C.; Dowben, P.A., The stability of the carbon tetrahalide ions, J. Chem. Soc. Faraday Trans. 2, 1987, 83, 403. [all data]

Andrews, 1968
Andrews, L., Infrared Spectrum of the Trichloromethyl Radical in Solid Argon, J. Chem. Phys., 1968, 48, 3, 972, https://doi.org/10.1063/1.1668852 . [all data]

Andrews and Carver, 1968
Andrews, L.; Carver, T.G., Reactions of Alkali-Metal Atoms with Carbon Tetrabromide. Infrared Spectra and Bonding in the Tribromomethyl Radical and Dibromocarbene in Solid Argon, J. Chem. Phys., 1968, 49, 2, 896, https://doi.org/10.1063/1.1670158 . [all data]

Rogers, Abramowitz, et al., 1970
Rogers, E.E.; Abramowitz, S.; Jacox, M.E.; Milligan, D.E., Matrix-Isolation Studies of the Infrared Spectra of the Free Radicals CCl3 and CBr3, J. Chem. Phys., 1970, 52, 5, 2198, https://doi.org/10.1063/1.1673285 . [all data]

Jacox, 1994
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules, American Chemical Society, Washington, DC, 1994, 464. [all data]

Notes

Go To: Top, Gas phase ion energetics data, Vibrational and/or electronic energy levels, References

Symbols used in this document:

EA Electron affinity
Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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