scandium
- Formula: Sc
- Molecular weight: 44.955912
- IUPAC Standard InChI: InChI=1S/Sc
- IUPAC Standard InChIKey: SIXSYDAISGFNSX-UHFFFAOYSA-N
- CAS Registry Number: 7440-20-2
- Chemical structure:
This structure is also available as a 2d Mol file - Permanent link for this species. Use this link for bookmarking this species for future reference.
- Information on this page:
- Other data available:
- Data at other public NIST sites:
- NIST Atomic Spectra Database - Lines Holdings (on physics web site)
- NIST Atomic Spectra Database - Levels Holdings (on physics web site)
- NIST Atomic Spectra Database - Ground states and ionization energies (on physics web site)
- Gas Phase Kinetics Database
- X-ray Photoelectron Spectroscopy Database, version 5.0
- Options:
Gas phase ion energetics data
Go To: Top, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias
L - Sharon G. Lias
Data compiled as indicated in comments:
LL - Sharon G. Lias and Joel F. Liebman
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
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess
View reactions leading to Sc+ (ion structure unspecified)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| IE (evaluated) | 6.56144 ± 0.00006 | eV | N/A | N/A | L |
| Quantity | Value | Units | Method | Reference | Comment |
| Proton affinity (review) | 914. | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
| Quantity | Value | Units | Method | Reference | Comment |
| Gas basicity | 892.0 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
Electron affinity determinations
| EA (eV) | Method | Reference | Comment |
|---|---|---|---|
| 0.189 ± 0.020 | LPES | Feigerle, Herman, et al., 1981 | B |
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 6.56144 | EVAL | Lide, 1992 | LL |
| 6.56144 ± 0.00006 | S | Kaufman and Sugar, 1988 | LL |
| 6.56149 | S | Kelly, 1987 | LBLHLM |
| 6.56 | PE | Dyke, Gravenor, et al., 1985 | LBLHLM |
| 6.7 ± 0.5 | EI | Haque and Gingerich, 1981 | LLK |
| 6.7 ± 0.5 | EI | Haque and Gingerich, 1979 | LLK |
| 6.54 | S | Moore, 1970 | RDSH |
References
Go To: Top, Gas phase ion energetics data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G.,
Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update,
J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018
. [all data]
Feigerle, Herman, et al., 1981
Feigerle, C.S.; Herman, Z.; Lineberger, W.C.,
Laser Photoelectron Spectroscopy of Sc- and Y-: A Determination of the Order of Electron Filling in Transition Metal Anions,
J. Electron Spectros. Rel. Phenom., 1981, 23, 3, 441, https://doi.org/10.1016/0368-2048(81)85050-5
. [all data]
Lide, 1992
Lide, D.R. (Editor),
Ionization potentials of atoms and atomic ions
in Handbook of Chem. and Phys., 1992, 10-211. [all data]
Kaufman and Sugar, 1988
Kaufman, V.; Sugar, J.,
Wavelengths and energy level classifications of scandium spectra for all stages of ionization,
J. Phys. Chem. Ref. Data, 1988, 17, 1679. [all data]
Kelly, 1987
Kelly, R.L.,
Atomic and ionic spectrum lines of hydrogen through kryton,
J. Phys. Chem. Ref. Data, 1987, 16. [all data]
Dyke, Gravenor, et al., 1985
Dyke, J.M.; Gravenor, B.W.J.; Hastings, M.P.; Josland, G.D.; Morris, A.,
Gas phase high temperature photoelectron spectroscopy: An investigation of the transition metals scandium and vanadium,
J. Electron Spectrosc. Relat. Phenom., 1985, 35, 65. [all data]
Haque and Gingerich, 1981
Haque, R.; Gingerich, K.A.,
Identification and atomization energies of gaseous molecules ScC2, ScC3, ScC4, ScC5, and ScC6 by high temperature mass spectrometry,
J. Chem. Phys., 1981, 74, 6407. [all data]
Haque and Gingerich, 1979
Haque, R.; Gingerich, K.A.,
Investigation of the thermodynamic stabilities of the gaseous molecules RhScC, RhScC2 RhYC2 by Knudsen effusion mass spectrometry,
J. Chem. Soc. Faraday Trans. 2, 1979, 985. [all data]
Moore, 1970
Moore, C.E.,
Ionization potentials and ionization limits derived from the analyses of optical spectra,
Natl. Stand. Ref. Data Ser., (U.S. Natl. Bur. Stand.), 1970, 34, 1. [all data]
Notes
Go To: Top, Gas phase ion energetics data, References
- Symbols used in this document:
EA Electron affinity IE (evaluated) Recommended ionization energy - 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.