arsenic
- Formula: As
- Molecular weight: 74.92160
- IUPAC Standard InChI: InChI=1S/As
- IUPAC Standard InChIKey: RQNWIZPPADIBDY-UHFFFAOYSA-N
- CAS Registry Number: 7440-38-2
- 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:
- 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:
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: John E. Bartmess
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
(CAS Reg. No. 51680-81-0 • 4294967295) +
= CAS Reg. No. 51680-81-0
By formula: (CAS Reg. No. 51680-81-0 • 4294967295As) + As = CAS Reg. No. 51680-81-0
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 91.3 ± 1.1 | kcal/mol | N/A | Lippa, Xu, et al., 1998 | gas phase |
(CAS Reg. No. 51680-83-2 • 4294967295) +
= CAS Reg. No. 51680-83-2
By formula: (CAS Reg. No. 51680-83-2 • 4294967295As) + As = CAS Reg. No. 51680-83-2
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 73.3 ± 4.1 | kcal/mol | N/A | Lippa, Xu, et al., 1998 | gas phase |
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
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
View reactions leading to As+ (ion structure unspecified)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| IE (evaluated) | 9.8152 | eV | N/A | N/A | L |
Electron affinity determinations
| EA (eV) | Method | Reference | Comment |
|---|---|---|---|
| 0.80480 ± 0.00020 | LPD | Walter, Gibson, et al., 2009 | B |
| 0.8140 ± 0.0080 | LPES | Lippa, Xu, et al., 1998 | B |
| 0.810 ± 0.030 | PD | Feldmann, Rackwitx, et al., 1977 | B |
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 9.8152 | EVAL | Lide, 1992 | LL |
| 9.81 | S | Kelly, 1987 | LBLHLM |
| 10.0 ± 0.3 | EI | Lau, Brittain, et al., 1981 | LLK |
| >10.0 | EI | Munir, Street, et al., 1971 | LLK |
| 9.7883 ± 0.0002 | S | Bhatia and Jones, 1971 | LLK |
| 9.7886 ± 0.0002 | S | Bhatia and Jones, 1971 | LLK |
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.
Lippa, Xu, et al., 1998
Lippa, T.P.; Xu, S.J.; Lyapustina, S.A.; Nilles, J.M.; Bowen, K.H.,
Photoelectron spectroscopy of As-, As-2(-), As-3(-), As-4(-), and As-5(-),
J. Chem. Phys., 1998, 109, 24, 10727-10731, https://doi.org/10.1063/1.477771
. [all data]
Walter, Gibson, et al., 2009
Walter, C.W.; Gibson, N.D.; Field, R.L.; Snedden, A.P.; Shapiro, J.Z.; Janczak, C.M.; Hanstorp, D.,
Electron affinity of arsenic and the fine structure of As- measured using infrared photodetachment threshold spectroscopy,
Phys. Rev. A, 2009, 80, 1, 014501, https://doi.org/10.1103/PhysRevA.80.014501
. [all data]
Feldmann, Rackwitx, et al., 1977
Feldmann, D.; Rackwitx, R.; Heinicke, E.; Kaiser, H.J.,
Photodetachment of Some Atomic Negative Ions: P-, As-, Sb-, Te-, Cr-, Ni-,
Z. Physik A., 1977, 282, 2, 143-148, https://doi.org/10.1007/BF01408156
. [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]
Kelly, 1987
Kelly, R.L.,
Atomic and ionic spectrum lines of hydrogen through kryton,
J. Phys. Chem. Ref. Data, 1987, 16. [all data]
Lau, Brittain, et al., 1981
Lau, K.H.; Brittain, R.D.; Hildenbrand, D.L.,
The dissociation energy of AsO from gaseous equilibrium measurements,
Chem. Phys. Lett., 1981, 81, 227. [all data]
Munir, Street, et al., 1971
Munir, Z.A.; Street, G.B.; Winters, H.F.,
Mass-spectrometric and vapor pressure studies on the sublimation of realgar (As4S4),
J. Chem. Phys., 1971, 55, 4520. [all data]
Bhatia and Jones, 1971
Bhatia, K.S.; Jones, W.E.,
Autoionized series in the arc spectrum of arsenic,
Can. J. Phys., 1971, 49, 1773. [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
- 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.