Iodine
- Formula: I2
- Molecular weight: 253.80894
- IUPAC Standard InChIKey: PNDPGZBMCMUPRI-UHFFFAOYSA-N
- CAS Registry Number: 7553-56-2
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: I2; Eranol; Iode; Iodine-127; Iodio; Iosan Superdip; Jod; Jood; Molecular iodine; Tincture iodine; Vistarin; Iodine crystals; Iodine sublimed; Diiodine; Diatomic iodine
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Reaction thermochemistry 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 compiled as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
MS - José A. Martinho Simões
B - 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.
Reactions 51 to 75
By formula: C2H4O + I2 = HI + C2H3IO
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 3. ± 2. | kJ/mol | Eqk | Walsh and Benson, 1966 | gas phase; ALS |
By formula: HI + C7H7IO = C7H8O + I2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -29. ± 5.0 | kJ/mol | Cm | Brennan and Ubbelohde, 1956 | gas phase; ALS |
By formula: HI + C2H5IS = C2H6S + I2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -28. ± 4.6 | kJ/mol | Kin | Shum and Benson, 1985 | gas phase; ALS |
C10H12W (cr) + 2 (cr) = C10H10I2W (cr) + 2 (g)
By formula: C10H12W (cr) + 2I2 (cr) = C10H10I2W (cr) + 2HI (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -104.3 ± 5.5 | kJ/mol | RSC | Calado, Dias, et al., 1979 | MS |
By formula: C7H7I = C7H8 + 0.5I2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -41. ± 2. | kJ/mol | Chyd | Ashcroft, Carson, et al., 1963 | liquid phase; ALS |
By formula: HI + C7H5IO = C7H6O + I2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -13. ± 4.2 | kJ/mol | Eqk | Solly and Benson, 1971 | gas phase; ALS |
(cr) + (cr) = C10H10I2Ti (cr) + 2 (g)
By formula: C12H10O2Ti (cr) + I2 (cr) = C10H10I2Ti (cr) + 2CO (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -74.1 ± 2.1 | kJ/mol | RSC | Dias, Dias, et al., 1987 | MS |
C10H11ClZr (cr) + (cr) = C10H10ClIZr (cr) + (g)
By formula: C10H11ClZr (cr) + I2 (cr) = C10H10ClIZr (cr) + HI (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -78.1 ± 2.4 | kJ/mol | RSC | Diogo, Simoni, et al., 1993 | MS |
C10H12Mo (cr) + 2 (cr) = C10H10I2Mo (cr) + 2 (g)
By formula: C10H12Mo (cr) + 2I2 (cr) = C10H10I2Mo (cr) + 2HI (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -87.8 ± 5.1 | kJ/mol | RSC | Calado, Dias, et al., 1979 | MS |
By formula: C2H4F2 + I2 = HI + C2H3BrF2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 51.0 ± 0.8 | kJ/mol | Eqk | Pickard and Rodgers, 1977 | gas phase; ALS |
By formula: C7H6O + I2 = HI + C7H5IO
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 13. ± 4.2 | kJ/mol | Eqk | Solly and Benson, 1971 | gas phase; ALS |
By formula: HI + C6H5I = C6H6 + I2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -22. ± 5.9 | kJ/mol | Cm | Graham, Nichol, et al., 1955 | gas phase; ALS |
C10H11IW (cr) + (cr) = C10H10I2W (cr) + (g)
By formula: C10H11IW (cr) + I2 (cr) = C10H10I2W (cr) + HI (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -84.6 ± 4.1 | kJ/mol | RSC | Calhorda, Dias, et al., 1987 | MS |
C12H14Mo (cr) + (cr) = C10H10I2Mo (cr) + (g)
By formula: C12H14Mo (cr) + I2 (cr) = C10H10I2Mo (cr) + C2H4 (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -163.0 ± 2.1 | kJ/mol | RSC | Calhorda, Carrondo, et al., 1991 | MS |
By formula: I3- + I2 = (I3- • I2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 49.0 ± 5.9 | kJ/mol | CIDT | Do, Klein, et al., 1997 | gas phase; B |
By formula: C5H10 + I2 = 2HI + C5H8
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 102.1 | kJ/mol | Eqk | Furuyama, Golden, et al., 1970 | gas phase; ALS |
By formula: HI + C4H7IO = I2 + C4H8O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -42.7 | kJ/mol | Kin | Solly, Golden, et al., 1970 | gas phase; ALS |
By formula: 2HI + C5H6 = C5H8 + I2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -89.5 | kJ/mol | Eqk | Furuyama, Golden, et al., 1970 | gas phase; ALS |
By formula: C4H6I2 = C4H6 + I2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 59.0 ± 4.2 | kJ/mol | Cm | Sunner and Wulff, 1973 | liquid phase; ALS |
By formula: C3H6I2 = C3H6 + I2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 47. ± 2. | kJ/mol | Eqk | Benson and Amano, 1962 | gas phase; ALS |
By formula: C2H4I2 = C2H4 + I2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 48.1 ± 0.8 | kJ/mol | Eqk | Benson and Amano, 1962 | gas phase; ALS |
By formula: C3H6I2 = C3H6 + I2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 77. ± 17. | kJ/mol | Eqk | Benson and Amano, 1962 | gas phase; ALS |
By formula: C4H8 + I2 = C4H8I2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -50.2 ± 6.3 | kJ/mol | Cm | Cline and Kistiakowsky, 1937 | gas phase; ALS |
By formula: C2H2I2 = C2H2 + I2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 83.3 | kJ/mol | Eqk | Furuyama, Golden, et al., 1968 | gas phase; ALS |
C2H2I2 = +
By formula: C2H2I2 = C2H2 + I2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 83.3 | kJ/mol | Eqk | Furuyama, Golden, et al., 1968 | gas phase; ALS |
References
Go To: Top, Reaction thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Walsh and Benson, 1966
Walsh, R.; Benson, S.W.,
The heats of formation of acetyl iodide and the acetyl radical,
J. Phys. Chem., 1966, 70, 3751-3753. [all data]
Brennan and Ubbelohde, 1956
Brennan, D.; Ubbelohde, A.R.,
A thermochemical evaluation of bond strengths in some carbon compounds. Part IV. Bond-strength differences based on the reaction: RI + HI = RH + I2, where R = p-methoxyphenyl and cyclohexyl,
J. Chem. Soc., 1956, 3011-3016. [all data]
Shum and Benson, 1985
Shum, L.G.S.; Benson, S.W.,
Iodine catalyzed pyrolysis of dimethyl sulfide. Heats of formaton of CH3SCH2I, the CH3SCH2 radical, and the pibond energy in CH2S,
Int. J. Chem. Kinet., 1985, 17, 277-292. [all data]
Calado, Dias, et al., 1979
Calado, J.C.G.; Dias, A.R.; Martinho Simões, J.A.; Ribeiro da Silva, M.A.V.,
Rev. Port. Quím., 1979, 21, 129. [all data]
Ashcroft, Carson, et al., 1963
Ashcroft, S.J.; Carson, A.S.; Pedley, J.B.,
Thermochemistry of reductions caused by lithium aluminium hydride. Part 2.-The heats of formation of benzyl bromide, benzyl iodide and the benzyl radical,
Trans. Faraday Soc., 1963, 59, 2713-2717. [all data]
Solly and Benson, 1971
Solly, R.K.; Benson, S.W.,
Thermochemistry of the reaction of benzaldehyde with iodine. The enthalpy of formation of benzaldehyde and benzoyl iodide,
J. Chem. Thermodyn., 1971, 3, 203-209. [all data]
Dias, Dias, et al., 1987
Dias, A.R.; Dias, P.B.; Diogo, H.P.; Galvão, A.M.; Minas da Piedade, M.E.; Martinho Simões, J.A.,
Organometallics, 1987, 6, 1427. [all data]
Diogo, Simoni, et al., 1993
Diogo, H.P.; Simoni, J.A.; Minas da Piedade, M.E.; Dias, A.R.; Martinho Simões, J.A.,
J. Am. Chem. Soc., 1993, 115, 2764. [all data]
Pickard and Rodgers, 1977
Pickard, J.M.; Rodgers, A.S.,
The kinetics and thermochemistry of the reaction of 1,1-difluoroethane with iodine. The difluoromethylene-hydrogen bond dissociation energy in 1,1-difluoroethane and the heat of formation of 1,1-difluoroethyl,
J. Am. Chem. Soc., 1977, 99, 691-694. [all data]
Graham, Nichol, et al., 1955
Graham, W.S.; Nichol, R.J.; Ubbelohde, A.R.,
A thermochemical evaluation of bond strengths in some carbon compounds. Part III. Bond strengths based on the reactions: (a) Ph·CH2I + HI=Ph·CH3 + I2 and (b) PhI + HI=PhH + I2,
J. Chem. Soc., 1955, 115-121. [all data]
Calhorda, Dias, et al., 1987
Calhorda, M.J.; Dias, A.R.; Minas da Piedade M.E.; Salema, M.S.; Martinho Simões J.A.,
Organometallics, 1987, 6, 734. [all data]
Calhorda, Carrondo, et al., 1991
Calhorda, M.J.; Carrondo, M.A.A.F.C.T.; Dias, A.R.; Galvão, A.M.; Garcia, M.H.; Martins, A.M.; Minas da Piedade, M.E.; Pinheiro, C.I.; Romão, C.C.; Martinho Simões, J.A.; Veiros, L.F.,
Organometallics, 1991, 10, 483. [all data]
Do, Klein, et al., 1997
Do, K.; Klein, T.P.; Pommerening, C.A.; Sunderlin, L.S.,
A New Flowing Afterglow-Guided Ion Beam Tandem Mass Spectrometer. Applications to the Thermochemistry of Polyiodide Ions,
J. Am. Soc. Mass Spectrom., 1997, 8, 7, 688, https://doi.org/10.1016/S1044-0305(97)00116-5
. [all data]
Furuyama, Golden, et al., 1970
Furuyama, S.; Golden, D.M.; Benson, S.W.,
Thermochemistry of cyclopentene and cyclopentadiene from studies of gas-phase equilibria,
J. Chem. Thermodyn., 1970, 2, 161-169. [all data]
Solly, Golden, et al., 1970
Solly, R.K.; Golden, D.M.; Benson, S.W.,
Kinetics and thermochemistry of the gas phase reaction of methyl ethyl ketone with iodine. II. The heat of formation and unimolecular decomposition of 2-iodo-3-butanone,
Int. J. Chem. Kinet., 1970, 2, 393-407. [all data]
Sunner and Wulff, 1973
Sunner, S.; Wulff, C.A.,
Ring strain in diiodocyclobutane,
Acta Chem. Scand., 1973, 27, 315-317. [all data]
Benson and Amano, 1962
Benson, S.W.; Amano, A.,
Thermodynamics of iodine addition to ethylene, propylene, and cyclopropane,
J. Chem. Phys., 1962, 36, 3464-3471. [all data]
Cline and Kistiakowsky, 1937
Cline, J.E.; Kistiakowsky, G.B.,
The gaseous equilibrium of 1,2-diiodobutane, butene-1 and iodine,
J. Chem. Phys., 1937, 5, 990. [all data]
Furuyama, Golden, et al., 1968
Furuyama, S.; Golden, D.M.; Benson, S.W.,
The thermochemistry of the gas-phase equilibria trans-1,2-diiodoethylene = acetylene + I2 and trans-1,2-diiodoethylene = cis-1,2-diiodoethylene,
J. Phys. Chem., 1968, 72, 3204-3208. [all data]
Notes
Go To: Top, Reaction thermochemistry data, References
- Symbols used in this document:
ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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