cerium triiodide

Formula: CeI₃
Molecular weight: 520.829
CAS Registry Number: 7790-87-6
Information on this page:
Other data available:
- Phase change data
- Reaction thermochemistry data
Options:
- Switch to calorie-based units

Gas phase ion energetics data

Go To: Top, Ion clustering data, References, Notes

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
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
B - John E. Bartmess

Electron affinity determinations

EA (eV)	Method	Reference	Comment
>0.29999	IMRB	Chantry, 1976	CeI₂^- + CeI₃ ->.; B

Ionization energy determinations

IE (eV)	Method	Reference	Comment
8.7	PE	Ruscic, Goodman, et al., 1983	LBLHLM
9.1 ± 0.1	EI	Chantry, 1976, 2	LLK
9.6 ± 0.5	EI	Hirayama and Castle, 1973	LLK
9.71	PE	Ruscic, Goodman, et al., 1983	Vertical value; LBLHLM

Appearance energy determinations

Ion	AE (eV)	Other Products	Method	Reference	Comment
Ce⁺	16.75 ± 0.15	?	EI	Chantry, 1976, 2	LLK
Ce⁺	17.7 ± 0.5	3I	EI	Hirayama and Castle, 1973	LLK
ICe⁺	13.15 ± 0.15	I₂?	EI	Chantry, 1976, 2	LLK
ICe⁺	13.6 ± 0.5	2I	EI	Hirayama and Castle, 1973	LLK
I₂Ce⁺	9.6 ± 0.1	I	EI	Chantry, 1976, 2	LLK
I₂Ce⁺	9.7 ± 0.5	I	EI	Hirayama and Castle, 1973	LLK

Ion clustering data

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

Data compiled as indicated in comments:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.

Clustering reactions

+ CeI₃ = ( • CeI₃)

By formula: I^- + CeI₃ = (I^- • CeI₃)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	280. ± 33.	kJ/mol	TDEq	Chantry, 1976	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	120.	J/mol*K	MS	Chantry, 1976	gas phase; heated collision chamber; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	250. ± 42.	kJ/mol	TDEq	Chantry, 1976	gas phase; B

References

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

Chantry, 1976
Chantry, P.J., Negative Ion Formation in Cerium Triiodide, J. Chem. Phys., 1976, 65, 11, 4412, https://doi.org/10.1063/1.432992 . [all data]

Ruscic, Goodman, et al., 1983
Ruscic, B.; Goodman, G.L.; Berkowitz, J., Photoelectron spectra of the lanthanide trihalides and their interpretation, J. Chem. Phys., 1983, 78, 5443. [all data]

Chantry, 1976, 2
Chantry, P.J., Positive ion appearance potentials measured in CeI₃, J. Chem. Phys., 1976, 65, 4421. [all data]

Hirayama and Castle, 1973
Hirayama, C.; Castle, P.M., Mass spectra of rare earth triiodides, J. Phys. Chem., 1973, 77, 3110. [all data]

Notes

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

Symbols used in this document:

AE Appearance energy

EA Electron affinity

Δ_rG° Free energy of reaction at standard conditions

Δ_rH° Enthalpy of reaction at standard conditions

Δ_rS° Entropy of reaction at standard conditions
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.

AE	Appearance energy
EA	Electron affinity
Δ_rG°	Free energy of reaction at standard conditions
Δ_rH°	Enthalpy of reaction at standard conditions
Δ_rS°	Entropy of reaction at standard conditions