molybdenum
- Formula: Mo
- Molecular weight: 95.96
- IUPAC Standard InChI: InChI=1S/Mo
- IUPAC Standard InChIKey: ZOKXTWBITQBERF-UHFFFAOYSA-N
- CAS Registry Number: 7439-98-7
- 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
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Gas phase thermochemistry data
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | 658.98 | kJ/mol | Review | Chase, 1998 | Data last reviewed in March, 1978 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 181.95 | J/mol*K | Review | Chase, 1998 | Data last reviewed in March, 1978 |
Gas Phase Heat Capacity (Shomate Equation)
Cp° = A + B*t + C*t2 + D*t3 +
E/t2
H° − H°298.15= A*t + B*t2/2 +
C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 −
E/(2*t2) + G
Cp = heat capacity (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 4951.969 to 6000. |
|---|---|
| A | 67.92850 |
| B | -40.53698 |
| C | 11.67139 |
| D | -0.819432 |
| E | -22.14035 |
| F | 600.8224 |
| G | 231.6710 |
| H | 658.9800 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in March, 1978 |
Condensed phase thermochemistry data
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°liquid | 41.57 | kJ/mol | Review | Chase, 1998 | Data last reviewed in March, 1978 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid,1 bar | 43.14 | J/mol*K | Review | Chase, 1998 | Data last reviewed in March, 1978 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid | 28.60 | J/mol*K | Review | Chase, 1998 | Data last reviewed in March, 1978 |
Liquid Phase Heat Capacity (Shomate Equation)
Cp° = A + B*t + C*t2 + D*t3 +
E/t2
H° − H°298.15= A*t + B*t2/2 +
C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 −
E/(2*t2) + G
Cp = heat capacity (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 2896. to 4951.969 |
|---|---|
| A | 37.65604 |
| B | -7.188071×10-8 |
| C | 1.413426×10-8 |
| D | -9.526382×10-10 |
| E | -1.562803×10-7 |
| F | 16.81545 |
| G | 70.48157 |
| H | 41.56804 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in March, 1978 |
Solid Phase Heat Capacity (Shomate Equation)
Cp° = A + B*t + C*t2 + D*t3 +
E/t2
H° − H°298.15= A*t + B*t2/2 +
C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 −
E/(2*t2) + G
Cp = heat capacity (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 298. to 1900. | 1900. to 2896. |
|---|---|---|
| A | 24.72736 | 1231.192 |
| B | 3.960425 | -963.4246 |
| C | -1.270706 | 283.7292 |
| D | 1.153065 | -28.04100 |
| E | -0.170246 | -712.2047 |
| F | -8.110684 | -1485.529 |
| G | 56.43379 | 573.7854 |
| H | 0.000000 | 0.000000 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in March, 1978 | Data last reviewed in March, 1978 |
Reaction thermochemistry data
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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) = 6
(g) +
(cr)
By formula: C6MoO6 (cr) = 6CO (g) + Mo (cr)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 325.9 ± 1.5 | kJ/mol | TD-HZC | Barnes, Pilcher, et al., 1974 | Please also see Pedley and Rylance, 1977 and Tel'noi and Rabinovich, 1977. |
| ΔrH° | 297.1 ± 4.2 | kJ/mol | TD-HFC | Connor, Skinner, et al., 1972 | Please also see Pedley and Rylance, 1977 and Tel'noi and Rabinovich, 1977. |
C9H9MoN3O3 (cr) = 3 (g) +
(cr) + 3
(g)
By formula: C9H9MoN3O3 (cr) = 3CO (g) + Mo (cr) + 3C2H3N (g)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 300.8 ± 9.4 | kJ/mol | HAL-HFC | Adedeji, Connor, et al., 1978 |
Gas phase ion energetics data
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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
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess
View reactions leading to Mo+ (ion structure unspecified)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| IE (evaluated) | 7.09243 ± 0.00004 | eV | N/A | N/A | L |
Electron affinity determinations
| EA (eV) | Method | Reference | Comment |
|---|---|---|---|
| 0.74942 ± 0.00026 | N/A | Bilodeau, Scheer, et al., 1998 | B |
| 0.7480 ± 0.0020 | LPES | Gunion, Dixon-Warren, et al., 1996 | B |
| 0.7470 ± 0.0040 | LPES | Bengali, Casey, et al., 1992 | B |
| 0.747 ± 0.010 | LPES | Feigerle, Corderman, et al., 1981 | B |
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 7.09243 | EVAL | Lide, 1992 | LL |
| 7.09243 ± 0.00004 | LS | Rayner, Mitchell, et al., 1987 | LBLHLM |
| 7.22 ± 0.06 | EI | Rauh and Ackermann, 1979 | LLK |
| 7.0 ± 0.3 | EI | Hildenbrand, 1976 | LLK |
| 7.10 | S | Hildenbrand, 1976 | LLK |
| 7.099 | S | Moore, 1970 | RDSH |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, 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.
Chase, 1998
Chase, M.W., Jr.,
NIST-JANAF Themochemical Tables, Fourth Edition,
J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]
Barnes, Pilcher, et al., 1974
Barnes, D.S.; Pilcher, G.; Pittam, D.A.; Skinner, H.A.; Todd, D.; Virmani, Y.,
J. Less-Common Met., 1974, 36, 177. [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]
Tel'noi and Rabinovich, 1977
Tel'noi, V.I.; Rabinovich, I.B.,
Russ. Chem. Rev., 1977, 46, 689. [all data]
Connor, Skinner, et al., 1972
Connor, J.A.; Skinner, H.A.; Virmani, Y.,
Microcalorimetric studies. Thermal decomposition and iodination of metal carbonyls,
J. Chem. Soc., Faraday Trans. 1, 1972, 68, 0, 1754, https://doi.org/10.1039/f19726801754
. [all data]
Adedeji, Connor, et al., 1978
Adedeji, F.A.; Connor, J.A.; Demain, C.P.; Martinho Simões, J.A.; Skinner, H.A.; Zafarani- Moattar, M.T.,
J. Organometal. Chem., 1978, 149, 333. [all data]
Bilodeau, Scheer, et al., 1998
Bilodeau, R.C.; Scheer, M.; Haugen, H.K.,
Infrared Laser Photodetachment of Transition Metal Negative Ions: Studies on Cr-, Mo-, Cu-, and Ag-,
J. Phys. B: Atom. Mol. Opt. Phys., 1998, 31, 17, 3885-3891, https://doi.org/10.1088/0953-4075/31/17/013
. [all data]
Gunion, Dixon-Warren, et al., 1996
Gunion, R.F.; Dixon-Warren, J.; Lineberger, W.C.; Morse, M.D.,
Ultraviolet Photoelectron Spectroscopy of Molybdenum and Molybdenum Monoxide Anions,
J. Chem. Phys., 1996, 104, 5, 1765, https://doi.org/10.1063/1.470975
. [all data]
Bengali, Casey, et al., 1992
Bengali, A.A.; Casey, S.M.; Cheng, C.-L.; Dick, J.P.; Fenn, T.; Villaalta, P.W.; Leopold, D.G.,
Negative Ion Photoelectron Spectroscopy of Coordinatively Unsaturated Group VI Metal Carbonyls: Cr(CO)3, Mo(CO)3, and W(CO)3,
J. Am. Chem. Soc., 1992, 114, 13, 5257, https://doi.org/10.1021/ja00039a043
. [all data]
Feigerle, Corderman, et al., 1981
Feigerle, C.S.; Corderman, R.R.; Bobashev, S.V.; Lineberger, W.C.,
Binding Energies and Structure of Transition Metal Negative Ions,
J. Chem. Phys., 1981, 74, 3, 1580, https://doi.org/10.1063/1.441289
. [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]
Rayner, Mitchell, et al., 1987
Rayner, D.M.; Mitchell, S.A.; Bourne, O.L.; Hackett, P.A.,
First-ionization potential of niobium and molybdenum by double-resonance, field-ionization spectroscopy,
J. Opt. Soc. Am. B, 1987, 4, 900. [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]
Hildenbrand, 1976
Hildenbrand, D.L.,
Thermochemical studies of the gaseous lower valent fluorides of molybdenum,
J. Chem. Phys., 1976, 65, 614. [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 thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
EA Electron affinity IE (evaluated) Recommended ionization energy S°gas,1 bar Entropy of gas at standard conditions (1 bar) S°liquid,1 bar Entropy of liquid at standard conditions (1 bar) S°solid Entropy of solid at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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