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Hydrogen cation


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: 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 251 to 300

C6H6BrO2- + Hydrogen cation = C6H7BrO2

By formula: C6H6BrO2- + H+ = C6H7BrO2

Quantity Value Units Method Reference Comment
Deltar1405. ± 8.8kJ/molG+TSAdcock, Baran, et al., 2005gas phase; Entropy of acidity reassigned at 24 eu; authors did not take symmetry changes into account
Quantity Value Units Method Reference Comment
Deltar1375. ± 8.4kJ/molCIDCAdcock, Baran, et al., 2005gas phase; Entropy of acidity reassigned at 24 eu; authors did not take symmetry changes into account

C2H5S- + Hydrogen cation = Ethanethiol

By formula: C2H5S- + H+ = C2H6S

Quantity Value Units Method Reference Comment
Deltar1488. ± 8.8kJ/molD-EAJanousek, Reed, et al., 1980gas phase
Deltar1486. ± 9.2kJ/molG+TSBartmess, Scott, et al., 1979gas phase; value altered from reference due to change in acidity scale
Quantity Value Units Method Reference Comment
Deltar1460. ± 8.4kJ/molIMREBartmess, Scott, et al., 1979gas phase; value altered from reference due to change in acidity scale

C7H9O2- + Hydrogen cation = C7H10O2

By formula: C7H9O2- + H+ = C7H10O2

Quantity Value Units Method Reference Comment
Deltar1441. ± 8.8kJ/molG+TSAdcock, Baran, et al., 2005gas phase; Entropy of acidity reassigned at 24 eu; authors did not take symmetry changes into account
Quantity Value Units Method Reference Comment
Deltar1412. ± 8.4kJ/molCIDCAdcock, Baran, et al., 2005gas phase; Entropy of acidity reassigned at 24 eu; authors did not take symmetry changes into account

C12H11O2- + Hydrogen cation = C12H12O2

By formula: C12H11O2- + H+ = C12H12O2

Quantity Value Units Method Reference Comment
Deltar1431. ± 8.8kJ/molG+TSAdcock, Baran, et al., 2005gas phase; Entropy of acidity reassigned at 24 eu; authors did not take symmetry changes into account
Quantity Value Units Method Reference Comment
Deltar1401. ± 8.4kJ/molCIDCAdcock, Baran, et al., 2005gas phase; Entropy of acidity reassigned at 24 eu; authors did not take symmetry changes into account

C8H9O4- + Hydrogen cation = C8H10O4

By formula: C8H9O4- + H+ = C8H10O4

Quantity Value Units Method Reference Comment
Deltar1421. ± 8.8kJ/molG+TSAdcock, Baran, et al., 2005gas phase; Entropy of acidity reassigned at 24 eu; authors did not take symmetry changes into account
Quantity Value Units Method Reference Comment
Deltar1391. ± 8.4kJ/molCIDCAdcock, Baran, et al., 2005gas phase; Entropy of acidity reassigned at 24 eu; authors did not take symmetry changes into account

C7H6NO2- + Hydrogen cation = C7H7NO2

By formula: C7H6NO2- + H+ = C7H7NO2

Quantity Value Units Method Reference Comment
Deltar1394. ± 8.8kJ/molG+TSAdcock, Baran, et al., 2005gas phase; Entropy of acidity reassigned at 24 eu; authors did not take symmetry changes into account
Quantity Value Units Method Reference Comment
Deltar1364. ± 8.4kJ/molCIDCAdcock, Baran, et al., 2005gas phase; Entropy of acidity reassigned at 24 eu; authors did not take symmetry changes into account

C6H6NO4- + Hydrogen cation = C6H7NO4

By formula: C6H6NO4- + H+ = C6H7NO4

Quantity Value Units Method Reference Comment
Deltar1389. ± 8.8kJ/molG+TSAdcock, Baran, et al., 2005gas phase; Entropy of acidity reassigned at 24 eu; authors did not take symmetry changes into account
Quantity Value Units Method Reference Comment
Deltar1359. ± 8.4kJ/molCIDCAdcock, Baran, et al., 2005gas phase; Entropy of acidity reassigned at 24 eu; authors did not take symmetry changes into account

C4H5O- + Hydrogen cation = Methacrolein

By formula: C4H5O- + H+ = C4H6O

Quantity Value Units Method Reference Comment
Deltar1578. ± 13.kJ/molG+TSBartmess and Burnham, 1984gas phase; value altered from reference due to change in acidity scale
Quantity Value Units Method Reference Comment
Deltar1549. ± 13.kJ/molIMRBBartmess and Burnham, 1984gas phase; value altered from reference due to change in acidity scale
Deltar1544. ± 13.kJ/molIMRBKleingeld and Nibbering, 1984gas phase

O- + Hydrogen cation = Hydroxyl radical

By formula: O- + H+ = HO

Quantity Value Units Method Reference Comment
Deltar1600.798 ± 0.042kJ/molD-EANeumark, Lykke, et al., 1985gas phase; Given: 1.461122(3) eV; revised to 1.4611107(17) eV, 95BLO, based on missing term+86CODATA
Quantity Value Units Method Reference Comment
Deltar1576.2 ± 0.63kJ/molH-TSNeumark, Lykke, et al., 1985gas phase; Given: 1.461122(3) eV; revised to 1.4611107(17) eV, 95BLO, based on missing term+86CODATA

C2H2FO- + Hydrogen cation = acetyl fluoride

By formula: C2H2FO- + H+ = C2H3FO

Quantity Value Units Method Reference Comment
Deltar1489. ± 16.kJ/molG+TSFarid and McMahon, 1980gas phase; Between MeCOCH2F, cyclopentadiene; value altered from reference due to change in acidity scale
Quantity Value Units Method Reference Comment
Deltar1460. ± 15.kJ/molIMRBFarid and McMahon, 1980gas phase; Between MeCOCH2F, cyclopentadiene; value altered from reference due to change in acidity scale

C7H4N- + Hydrogen cation = Benzonitrile

By formula: C7H4N- + H+ = C7H5N

Quantity Value Units Method Reference Comment
Deltar1603. ± 10.kJ/molTDEqMeot-ner and Kafafi, 1988gas phase; anchored to 88MEO scale, not the "87 acidity scale". The Kiefer, Zhang, et al., 1997 BDE is for ortho.
Quantity Value Units Method Reference Comment
Deltar1567. ± 8.4kJ/molTDEqMeot-ner and Kafafi, 1988gas phase; anchored to 88MEO scale, not the "87 acidity scale". The Kiefer, Zhang, et al., 1997 BDE is for ortho.

quinolinide anion + Hydrogen cation = Quinoline

By formula: C9H6N- + H+ = C9H7N

Quantity Value Units Method Reference Comment
Deltar1613. ± 8.4kJ/molTDEqMeot-ner, Liebman, et al., 1988gas phase; anchored to 88MEO scale, not the "87 acidity scale". The Kiefer, Zhang, et al., 1997 BDE is for ortho.
Quantity Value Units Method Reference Comment
Deltar1577. ± 8.4kJ/molTDEqMeot-ner, Liebman, et al., 1988gas phase; anchored to 88MEO scale, not the "87 acidity scale". The Kiefer, Zhang, et al., 1997 BDE is for ortho.

HN2O2- + Hydrogen cation = H2N-NO2

By formula: HN2O2- + H+ = H2N2O2

Quantity Value Units Method Reference Comment
Deltar1448. ± 9.2kJ/molG+TSAttina, Cacace, et al., 1993gas phase; «DELTA»fH(H2NNO2): estimated sublimation enthalpy in Gurvich, Veyts, et al. seems too small - JEB
Quantity Value Units Method Reference Comment
Deltar1415. ± 8.4kJ/molIMREAttina, Cacace, et al., 1993gas phase; «DELTA»fH(H2NNO2): estimated sublimation enthalpy in Gurvich, Veyts, et al. seems too small - JEB

C6H7- + Hydrogen cation = 1,3-Bis(methylene)cyclobutane

By formula: C6H7- + H+ = C6H8

Quantity Value Units Method Reference Comment
Deltar1534. ± 13.kJ/molG+TSHill and Squires, 1998gas phase; acidity between MeCHO, (FCH2)2CHOH. Reprotonate to conjugated form, «DELTA»Gacid=361.9, IMRB
Quantity Value Units Method Reference Comment
Deltar1500. ± 13.kJ/molIMRBHill and Squires, 1998gas phase; acidity between MeCHO, (FCH2)2CHOH. Reprotonate to conjugated form, «DELTA»Gacid=361.9, IMRB

C3H11BN- + Hydrogen cation = Trimethylamine, compd. with borane (1:1)

By formula: C3H11BN- + H+ = C3H12BN

Quantity Value Units Method Reference Comment
Deltar1645. ± 8.8kJ/molG+TSRen, Workman, et al., 1998gas phase; Acid heat est. from B-N bond strength of "35-40 kcal/mol" in Ren, Workman, et al., 1998
Quantity Value Units Method Reference Comment
Deltar1607. ± 8.4kJ/molIMRBRen, Workman, et al., 1998gas phase; Acid heat est. from B-N bond strength of "35-40 kcal/mol" in Ren, Workman, et al., 1998

C8H9- + Hydrogen cation = Ethylbenzene

By formula: C8H9- + H+ = C8H10

Quantity Value Units Method Reference Comment
Deltar1699. ± 19.kJ/molCIDTGraul and Squires, 1990gas phase; From decarboxylation threshold. Stable form probably the spiro[2.5]octadienide Maas and van Keelen, 1989
Quantity Value Units Method Reference Comment
Deltar1664. ± 20.kJ/molH-TSGraul and Squires, 1990gas phase; From decarboxylation threshold. Stable form probably the spiro[2.5]octadienide Maas and van Keelen, 1989

C13H12NO5- + Hydrogen cation = C13H13NO5

By formula: C13H12NO5- + H+ = C13H13NO5

Quantity Value Units Method Reference Comment
Deltar1367. ± 8.8kJ/molG+TSMishima, Matsuoka, et al., 2004gas phase; Meldrums acid is: 2,2-diMe-1,3-dioxan-4,6-dione. Calc: enol form of acid more stable.
Quantity Value Units Method Reference Comment
Deltar1333. ± 8.4kJ/molIMREMishima, Matsuoka, et al., 2004gas phase; Meldrums acid is: 2,2-diMe-1,3-dioxan-4,6-dione. Calc: enol form of acid more stable.

C4H5O- + Hydrogen cation = Cyclopropanecarboxaldehyde

By formula: C4H5O- + H+ = C4H6O

Quantity Value Units Method Reference Comment
Deltar1631. ± 21.kJ/molG+TSBaschky, Peterson, et al., 1994gas phase; Between D2O and PhF. Cis and Trans anions do not interconvert and have same expt. acidity.
Quantity Value Units Method Reference Comment
Deltar1598. ± 21.kJ/molIMRBBaschky, Peterson, et al., 1994gas phase; Between D2O and PhF. Cis and Trans anions do not interconvert and have same expt. acidity.

C3H2F5O- + Hydrogen cation = 2,2,3,3,3-Pentafluoro-1-propanol

By formula: C3H2F5O- + H+ = C3H3F5O

Quantity Value Units Method Reference Comment
Deltar1487. ± 26.kJ/molG+TSDawson and Jennings, 1977gas phase; Between (CF3)2CHOH, CF3CH2OH; value altered from reference due to change in acidity scale
Quantity Value Units Method Reference Comment
Deltar1459. ± 25.kJ/molIMRBDawson and Jennings, 1977gas phase; Between (CF3)2CHOH, CF3CH2OH; value altered from reference due to change in acidity scale

C4H2F7O- + Hydrogen cation = 2,2,3,3,4,4,4-Heptafluoro-butanol

By formula: C4H2F7O- + H+ = C4H3F7O

Quantity Value Units Method Reference Comment
Deltar1465. ± 26.kJ/molG+TSDawson and Jennings, 1977gas phase; Between (CF3)2CHOH, CF3CH2OH; value altered from reference due to change in acidity scale
Quantity Value Units Method Reference Comment
Deltar1437. ± 25.kJ/molIMRBDawson and Jennings, 1977gas phase; Between (CF3)2CHOH, CF3CH2OH; value altered from reference due to change in acidity scale

C2H2F- + Hydrogen cation = Ethene, fluoro-

By formula: C2H2F- + H+ = C2H3F

Quantity Value Units Method Reference Comment
Deltar1618. ± 17.kJ/molG+TSRabasco and Kass, 1992gas phase; Comparable to PhF. Vinyl anion structure proved, rxn with D2O -> more stable HC«equiv»CH..F-
Quantity Value Units Method Reference Comment
Deltar1586. ± 17.kJ/molIMRBRabasco and Kass, 1992gas phase; Comparable to PhF. Vinyl anion structure proved, rxn with D2O -> more stable HC«equiv»CH..F-

C3H2NO- + Hydrogen cation = Acetyl cyanide

By formula: C3H2NO- + H+ = C3H3NO

Quantity Value Units Method Reference Comment
Deltar1441. ± 8.8kJ/molG+TSTaft, 1987gas phase; value altered from reference due to change in acidity scale
Quantity Value Units Method Reference Comment
Deltar1413. ± 8.4kJ/molIMRETaft, 1987gas phase; value altered from reference due to change in acidity scale
Deltar1432. ± 21.kJ/molIMRBBrauman and Blair, 1968gas phase

C4H9O2- + Hydrogen cation = 1,4-Butanediol

By formula: C4H9O2- + H+ = C4H10O2

Quantity Value Units Method Reference Comment
Deltar1490. ± 10.kJ/molG+TSCrowder and Bartmess, 1993gas phase; «DELTA»Gacid at 80°C
Quantity Value Units Method Reference Comment
Deltar1484. ± 8.4kJ/molIMRECrowder and Bartmess, 1993gas phase; «DELTA»Gacid at 80°C
Deltar1507.1 ± 1.3kJ/molCIDCHouriet, Tabet, et al., 1984gas phase; value altered from reference due to change in acidity scale

adeninide anion + Hydrogen cation = Adenine

By formula: C5H4N5- + H+ = C5H5N5

Quantity Value Units Method Reference Comment
Deltar1402. ± 9.2kJ/molG+TSSharma and Lee, 2002gas phase; Acidity at N-9(imidazole N)
Quantity Value Units Method Reference Comment
Deltar1372. ± 8.4kJ/molIMRBSharma and Lee, 2002gas phase; Acidity at N-9(imidazole N)
Deltar1441. ± 17.kJ/molIMRBSharma and Lee, 2002gas phase; Less acidic N-10 site(aniline)

C6H6N5- + Hydrogen cation = 6-Amino-3-methylpurine

By formula: C6H6N5- + H+ = C6H7N5

Quantity Value Units Method Reference Comment
Deltar1454. ± 17.kJ/molG+TSSharma and Lee, 2002gas phase; Neutral acid is probably imine at N10(aniline site) and acidic site is N9 imidazole
Quantity Value Units Method Reference Comment
Deltar1424. ± 17.kJ/molIMRBSharma and Lee, 2002gas phase; Neutral acid is probably imine at N10(aniline site) and acidic site is N9 imidazole

C3H3F2O- + Hydrogen cation = 2-Propanone, 1,3-difluoro-

By formula: C3H3F2O- + H+ = C3H4F2O

Quantity Value Units Method Reference Comment
Deltar1466. ± 13.kJ/molG+TSFarid and McMahon, 1980gas phase; Between PhCH2CN, CF3COCH3; value altered from reference due to change in acidity scale
Quantity Value Units Method Reference Comment
Deltar1436. ± 13.kJ/molIMRBFarid and McMahon, 1980gas phase; Between PhCH2CN, CF3COCH3; value altered from reference due to change in acidity scale

benzynide anion + Hydrogen cation = Benzyne

By formula: C6H3- + H+ = C6H4

Quantity Value Units Method Reference Comment
Deltar1584. ± 13.kJ/molG+TSGuo and Grabowski, 1991gas phase; Acidity between MeOH and tBuOH, comparable to EtOH
Quantity Value Units Method Reference Comment
Deltar1552. ± 13.kJ/molIMRBGuo and Grabowski, 1991gas phase; Acidity between MeOH and tBuOH, comparable to EtOH
Deltar1556. ± 21.kJ/molIMRBGronert and DePuy, 1989gas phase

C4H4P- + Hydrogen cation = C4H5P

By formula: C4H4P- + H+ = C4H5P

Quantity Value Units Method Reference Comment
Deltar1415. ± 13.kJ/molG+TSSunderlin, Panu, et al., 1994gas phase; Between FCH2CO2H and MeCHClCO2H. structure: P analog of pyrrole. Probably C protonation.
Quantity Value Units Method Reference Comment
Deltar1385. ± 13.kJ/molIMRBSunderlin, Panu, et al., 1994gas phase; Between FCH2CO2H and MeCHClCO2H. structure: P analog of pyrrole. Probably C protonation.

C4H4As- + Hydrogen cation = C4H5As

By formula: C4H4As- + H+ = C4H5As

Quantity Value Units Method Reference Comment
Deltar1417. ± 13.kJ/molG+TSSunderlin, Panu, et al., 1994gas phase; Between FCH2CO2H and MeCHClCO2H. Structure: As analog of pyrrole. Probably C protonation
Quantity Value Units Method Reference Comment
Deltar1385. ± 13.kJ/molIMRBSunderlin, Panu, et al., 1994gas phase; Between FCH2CO2H and MeCHClCO2H. Structure: As analog of pyrrole. Probably C protonation

C10H13NO2- + Hydrogen cation = C10H14NO2

By formula: C10H13NO2- + H+ = C10H14NO2

Quantity Value Units Method Reference Comment
Deltar1057. ± 13.kJ/molG+TSStrittmatter, Wong, et al., 2000gas phase; This acidity is ca. 24 kcal/mol stronger than that given by G3(MP2)B3 calculations.
Quantity Value Units Method Reference Comment
Deltar1028. ± 13.kJ/molCIDCStrittmatter, Wong, et al., 2000gas phase; This acidity is ca. 24 kcal/mol stronger than that given by G3(MP2)B3 calculations.

C8H10FSi- + Hydrogen cation = C8H11FSi

By formula: C8H10FSi- + H+ = C8H11FSi

Quantity Value Units Method Reference Comment
Deltar1577. ± 9.2kJ/molG+TSIrie, Kikukawa, et al., 2001gas phase; The anion may be ArSiH(Me)CH2-, based on LFER size and ab initio calculations - JEB
Quantity Value Units Method Reference Comment
Deltar1544. ± 8.4kJ/molIMREIrie, Kikukawa, et al., 2001gas phase; The anion may be ArSiH(Me)CH2-, based on LFER size and ab initio calculations - JEB

C8H10NO2Si- + Hydrogen cation = C8H11NO2Si

By formula: C8H10NO2Si- + H+ = C8H11NO2Si

Quantity Value Units Method Reference Comment
Deltar1567. ± 9.2kJ/molG+TSIrie, Kikukawa, et al., 2001gas phase; The anion may be ArSiH(Me)CH2-, based on LFER size and ab initio calculations - JEB
Quantity Value Units Method Reference Comment
Deltar1534. ± 8.4kJ/molIMREIrie, Kikukawa, et al., 2001gas phase; The anion may be ArSiH(Me)CH2-, based on LFER size and ab initio calculations - JEB

styrenide anion + Hydrogen cation = Styrene

By formula: C8H7- + H+ = C8H8

Quantity Value Units Method Reference Comment
Deltar1636. ± 10.kJ/molTDEqMeot-ner and Kafafi, 1988gas phase; Acid: styrene. AM1 says ortho deprotonation prefered to alpha. Anchored to 88MEO scale.
Quantity Value Units Method Reference Comment
Deltar1604. ± 8.4kJ/molTDEqMeot-ner and Kafafi, 1988gas phase; Acid: styrene. AM1 says ortho deprotonation prefered to alpha. Anchored to 88MEO scale.

C9H10F3Si- + Hydrogen cation = C9H11F3Si

By formula: C9H10F3Si- + H+ = C9H11F3Si

Quantity Value Units Method Reference Comment
Deltar1574. ± 9.2kJ/molG+TSIrie, Kikukawa, et al., 2001gas phase; The anion may be ArSiH(Me)CH2-, based on LFER size and ab initio calculations - JEB
Quantity Value Units Method Reference Comment
Deltar1541. ± 8.4kJ/molIMREIrie, Kikukawa, et al., 2001gas phase; The anion may be ArSiH(Me)CH2-, based on LFER size and ab initio calculations - JEB

CH3O3S- + Hydrogen cation = CH4O3S

By formula: CH3O3S- + H+ = CH4O3S

Quantity Value Units Method Reference Comment
Deltar1439. ± 21.kJ/molG+TSGrabowski and Lum, 1990gas phase; Comparable to MeCOCH2COMe; value altered from reference due to change in acidity scale
Quantity Value Units Method Reference Comment
Deltar1408. ± 21.kJ/molIMRBGrabowski and Lum, 1990gas phase; Comparable to MeCOCH2COMe; value altered from reference due to change in acidity scale

C9H13OSi- + Hydrogen cation = C9H14OSi

By formula: C9H13OSi- + H+ = C9H14OSi

Quantity Value Units Method Reference Comment
Deltar1585. ± 9.2kJ/molG+TSIrie, Kikukawa, et al., 2001gas phase; The anion may be ArSiH(Me)CH2-, based on LFER size and ab initio calculations - JEB
Quantity Value Units Method Reference Comment
Deltar1553. ± 8.4kJ/molIMREIrie, Kikukawa, et al., 2001gas phase; The anion may be ArSiH(Me)CH2-, based on LFER size and ab initio calculations - JEB

C8H10FSi- + Hydrogen cation = C8H11FSi

By formula: C8H10FSi- + H+ = C8H11FSi

Quantity Value Units Method Reference Comment
Deltar1579. ± 9.2kJ/molG+TSIrie, Kikukawa, et al., 2001gas phase; The anion may be ArSiH(Me)CH2-, based on LFER size and ab initio calculations - JEB
Quantity Value Units Method Reference Comment
Deltar1547. ± 8.4kJ/molIMREIrie, Kikukawa, et al., 2001gas phase; The anion may be ArSiH(Me)CH2-, based on LFER size and ab initio calculations - JEB

C8H10ClSi- + Hydrogen cation = C8H11ClSi

By formula: C8H10ClSi- + H+ = C8H11ClSi

Quantity Value Units Method Reference Comment
Deltar1576. ± 9.2kJ/molG+TSIrie, Kikukawa, et al., 2001gas phase; The anion may be ArSiH(Me)CH2-, based on LFER size and ab initio calculations - JEB
Quantity Value Units Method Reference Comment
Deltar1544. ± 8.4kJ/molIMREIrie, Kikukawa, et al., 2001gas phase; The anion may be ArSiH(Me)CH2-, based on LFER size and ab initio calculations - JEB

C8H10ClSi- + Hydrogen cation = C8H11ClSi

By formula: C8H10ClSi- + H+ = C8H11ClSi

Quantity Value Units Method Reference Comment
Deltar1575. ± 9.2kJ/molG+TSIrie, Kikukawa, et al., 2001gas phase; The anion may be ArSiH(Me)CH2-, based on LFER size and ab initio calculations - JEB
Quantity Value Units Method Reference Comment
Deltar1543. ± 8.4kJ/molIMREIrie, Kikukawa, et al., 2001gas phase; The anion may be ArSiH(Me)CH2-, based on LFER size and ab initio calculations - JEB

C9H10F3Si- + Hydrogen cation = C9H11F3Si

By formula: C9H10F3Si- + H+ = C9H11F3Si

Quantity Value Units Method Reference Comment
Deltar1573. ± 9.2kJ/molG+TSIrie, Kikukawa, et al., 2001gas phase; The anion may be ArSiH(Me)CH2-, based on LFER size and ab initio calculations - JEB
Quantity Value Units Method Reference Comment
Deltar1541. ± 8.4kJ/molIMREIrie, Kikukawa, et al., 2001gas phase; The anion may be ArSiH(Me)CH2-, based on LFER size and ab initio calculations - JEB

C3HF4O- + Hydrogen cation = 1,1,3,3-tetrafluoroacetone

By formula: C3HF4O- + H+ = C3H2F4O

Quantity Value Units Method Reference Comment
Deltar1429. ± 23.kJ/molG+TSFarid and McMahon, 1980gas phase; Between HCO2H, FCH2CO2H; value altered from reference due to change in acidity scale
Quantity Value Units Method Reference Comment
Deltar1401. ± 23.kJ/molIMRBFarid and McMahon, 1980gas phase; Between HCO2H, FCH2CO2H; value altered from reference due to change in acidity scale

C5H5S- + Hydrogen cation = Thiophene, 3-methyl-

By formula: C5H5S- + H+ = C5H6S

Quantity Value Units Method Reference Comment
Deltar1593. ± 13.kJ/molG+TSDePuy, Kass, et al., 1988gas phase; Acid: 3-methylthiophene. Between MeOH, EtOH. 1 D exchange implies ring proton as site.
Quantity Value Units Method Reference Comment
Deltar1561. ± 13.kJ/molIMRBDePuy, Kass, et al., 1988gas phase; Acid: 3-methylthiophene. Between MeOH, EtOH. 1 D exchange implies ring proton as site.

C8H11Si- + Hydrogen cation = Silane, dimethylphenyl-

By formula: C8H11Si- + H+ = C8H12Si

Quantity Value Units Method Reference Comment
Deltar1582. ± 9.2kJ/molG+TSIrie, Kikukawa, et al., 2001gas phase; The anion may be ArSiH(Me)CH2-, based on LFER size and ab initio calculations - JEB
Quantity Value Units Method Reference Comment
Deltar1550. ± 8.4kJ/molIMREIrie, Kikukawa, et al., 2001gas phase; The anion may be ArSiH(Me)CH2-, based on LFER size and ab initio calculations - JEB

C6HCl4- + Hydrogen cation = Benzene, 1,2,3,4-tetrachloro-

By formula: C6HCl4- + H+ = C6H2Cl4

Quantity Value Units Method Reference Comment
Deltar1541. ± 8.8kJ/molG+TSSchlosser, Marzi, et al., 2001gas phase; Acid: 1,2,3,4-tetrachlorobenzene. Anion assigned based on ab initio calculations.
Quantity Value Units Method Reference Comment
Deltar1507. ± 8.4kJ/molIMRESchlosser, Marzi, et al., 2001gas phase; Acid: 1,2,3,4-tetrachlorobenzene. Anion assigned based on ab initio calculations.

C2H2NO2- + Hydrogen cation = Nitroethylene

By formula: C2H2NO2- + H+ = C2H3NO2

Quantity Value Units Method Reference Comment
Deltar1515. ± 19.kJ/molEIAEShiga, Yamaoka, et al., 1972gas phase; From CH2=CHNO2
Deltar<1563.1kJ/molG+TSBartmess, 1980gas phase
Quantity Value Units Method Reference Comment
Deltar1483. ± 22.kJ/molH-TSShiga, Yamaoka, et al., 1972gas phase; From CH2=CHNO2
Deltar<1531.3kJ/molIMRBBartmess, 1980gas phase

C6HCl4- + Hydrogen cation = Benzene, 1,2,4,5-tetrachloro-

By formula: C6HCl4- + H+ = C6H2Cl4

Quantity Value Units Method Reference Comment
Deltar1520. ± 8.8kJ/molG+TSSchlosser, Marzi, et al., 2001gas phase; Acid: 1,2,3,5-tetrachlorobenzene. Anion assigned based on ab initio calculations.
Quantity Value Units Method Reference Comment
Deltar1487. ± 8.4kJ/molIMRESchlosser, Marzi, et al., 2001gas phase; Acid: 1,2,3,5-tetrachlorobenzene. Anion assigned based on ab initio calculations.

C4H4N- + Hydrogen cation = Cyclopropanecarbonitrile

By formula: C4H4N- + H+ = C4H5N

Quantity Value Units Method Reference Comment
Deltar1571. ± 9.2kJ/molG+TSBartmess, Scott, et al., 1979gas phase; Acid: cyanocyclopropane; value altered from reference due to change in acidity scale
Quantity Value Units Method Reference Comment
Deltar1539. ± 8.4kJ/molIMREBartmess, Scott, et al., 1979gas phase; Acid: cyanocyclopropane; value altered from reference due to change in acidity scale

C3H4FO- + Hydrogen cation = 2-Propanone, 1-fluoro-

By formula: C3H4FO- + H+ = C3H5FO

Quantity Value Units Method Reference Comment
Deltar1496. ± 15.kJ/molG+TSFarid and McMahon, 1980gas phase; Between pyrrole, MeNO2; value altered from reference due to change in acidity scale
Quantity Value Units Method Reference Comment
Deltar1465. ± 15.kJ/molIMRBFarid and McMahon, 1980gas phase; Between pyrrole, MeNO2; value altered from reference due to change in acidity scale

C6H2Cl3- + Hydrogen cation = Benzene, 1,2,4-trichloro-

By formula: C6H2Cl3- + H+ = C6H3Cl3

Quantity Value Units Method Reference Comment
Deltar1549. ± 8.8kJ/molG+TSSchlosser, Marzi, et al., 2001gas phase; Acid: 1,2,4-trichlorobenzene. Anion assigned based on ab initio calculations.
Quantity Value Units Method Reference Comment
Deltar1517. ± 8.4kJ/molIMRESchlosser, Marzi, et al., 2001gas phase; Acid: 1,2,4-trichlorobenzene. Anion assigned based on ab initio calculations.

H2O4P- + Hydrogen cation = Phosphoric Acid

By formula: H2O4P- + H+ = H3O4P

Quantity Value Units Method Reference Comment
Deltar1383. ± 21.kJ/molG+TSMorris, Knighton, et al., 1997gas phase; Between HCl, HBr. For neutral heat, «DELTA»Hvap=3/2*H2SO4, plus «DELTA»Hf(liquid)
Quantity Value Units Method Reference Comment
Deltar1351. ± 21.kJ/molIMRBMorris, Knighton, et al., 1997gas phase; Between HCl, HBr. For neutral heat, «DELTA»Hvap=3/2*H2SO4, plus «DELTA»Hf(liquid)

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.

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Notes

Go To: Top, Reaction thermochemistry data, References