osmium
- Formula: Os
- Molecular weight: 190.23
- IUPAC Standard InChI: InChI=1S/Os
- IUPAC Standard InChIKey: SYQBFIAQOQZEGI-UHFFFAOYSA-N
- CAS Registry Number: 7440-04-2
- 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:
- Data at other public NIST sites:
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Reaction thermochemistry data
Go To: Top, Gas phase ion energetics 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: José A. Martinho Simões
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Individual Reactions
(cr) = 12
(g) + 3
(cr)
By formula: C12O12Os3 (cr) = 12CO (g) + 3Os (cr)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 101.0 ± 4.0 | kcal/mol | TD-HFC | Connor, Skinner, et al., 1973 | Please also see Pedley and Rylance, 1977. The value for the reaction enthalpy was considered a low limit Connor, Skinner, et al., 1973 |
Gas phase ion energetics data
Go To: Top, Reaction 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 evaluated as indicated in comments:
L - Sharon G. Lias
Data compiled as indicated in comments:
LL - Sharon G. Lias and Joel F. Liebman
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 Os+ (ion structure unspecified)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| IE (evaluated) | 8.7 | eV | N/A | N/A | L |
Electron affinity determinations
| EA (eV) | Reference | Comment |
|---|---|---|
| 1.07782 ± 0.00013 | Bilodeau and Haugen, 2000 | Reported: 1.07780(12) eV. See Fischer, Canali, et al., 2010 for Optical hyperfine Structure measurement; B |
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 8.7 | EVAL | Lide, 1992 | LL |
| 8.15 ± 0.09 | EI | Rauh and Ackermann, 1979 | LLK |
| 8.7 | S | Moore, 1970 | RDSH |
References
Go To: Top, Reaction thermochemistry data, 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.
Connor, Skinner, et al., 1973
Connor, J.A.; Skinner, H.A.; Virmani, Y.,
High temperature microcalorimetric studies of the thermal decomposition and iodination of polynuclear carbonyls of Fe, Co, Ru, Rh, Re, Os and Ir,
Faraday Symp. Chem. Soc., 1973, 8, 18, https://doi.org/10.1039/fs9730800018
. [all data]
Pedley and Rylance, 1977
Pedley, J.B.; Rylance, J.,
Computer Analysed Thermochemical Data: Organic and Organometallic Compounds, University of Sussex, Brigton, 1977. [all data]
Bilodeau and Haugen, 2000
Bilodeau, R.C.; Haugen, H.K.,
Experimental studies of Os-: Observation of a bound-bound electric dipole transition in an atomic negative ion,
Phys. Rev. Lett., 2000, 85, 3, 534-537, https://doi.org/10.1103/PhysRevLett.85.534
. [all data]
Fischer, Canali, et al., 2010
Fischer, A.; Canali, C.; Warring, U.; Kellerbauer, A.; Fritzsche, S.,
First Optical Hyperfine Structure Measurement in an Atomic Anion,
Phys. Rev. Lett., 2010, 104, 7, 073004, https://doi.org/10.1103/PhysRevLett.104.073004
. [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]
Rauh and Ackermann, 1979
Rauh, E.G.; Ackermann, R.J.,
The first ionization potentials of the transition metals,
J. Chem. Phys., 1979, 70, 1004. [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, Reaction thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
EA Electron affinity IE (evaluated) Recommended ionization energy ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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