Formic acid, 1-methylethyl ester
- Formula: C4H8O2
- Molecular weight: 88.1051
- IUPAC Standard InChIKey: RMOUBSOVHSONPZ-UHFFFAOYSA-N
- CAS Registry Number: 625-55-8
- 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. - Isotopologues:
- Other names: Formic acid, isopropyl ester; Isopropyl formate; HCOOCH(CH3)2; UN 1281; Formic acid, 2-propyl ester; Methylethyl formate
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Gas phase ion energetics data
Go To: Top, Gas Chromatography, 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:
HL - Edward P. Hunter and Sharon G. Lias
Data compiled as indicated in comments:
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
View reactions leading to C4H8O2+ (ion structure unspecified)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Proton affinity (review) | 811.3 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
Quantity | Value | Units | Method | Reference | Comment |
Gas basicity | 780.3 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
10.44 ± 0.05 | PE | Benoit, Harrison, et al., 1977 | LLK |
10.44 | PE | Benoit and Harrison, 1977 | Vertical value; LLK |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
CH3O+ | 13.5 ± 0.1 | ? | EI | VanRaalte and Harrison, 1963 | RDSH |
CH3O2+ | 10.38 ± 0.05 | CH2=CHCH3 | EI | Benoit, Harrison, et al., 1977 | LLK |
CH3O2+ | 10.9 ± 0.1 | ? | EI | VanRaalte and Harrison, 1963 | RDSH |
C2H5O+ | 11.5 ± 0.1 | ? | EI | VanRaalte and Harrison, 1963 | RDSH |
Gas Chromatography
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: NIST Mass Spectrometry Data Center, William E. Wallace, director
Kovats' RI, non-polar column, isothermal
Column type | Active phase | Temperature (C) | I | Reference | Comment |
---|---|---|---|---|---|
Packed | Squalane | 80. | 518. | Fernández-Sánchez, García-Domínguez, et al., 1987 | H2 |
Packed | Apiezon L | 120. | 527. | Bogoslovsky, Anvaer, et al., 1978 | Celite 545 |
Packed | Apiezon L | 160. | 529. | Bogoslovsky, Anvaer, et al., 1978 | Celite 545 |
Packed | Apiezon L | 70. | 532. | Bogoslovsky, Anvaer, et al., 1978 | |
Packed | SE-30 | 150. | 552. | Ashes and Haken, 1974 | Celaton (62-72 mesh); Column length: 3.7 m |
Packed | Squalane | 50. | 516. | Mira and Sanchez, 1970 | Chromosorb G |
Packed | SE-30 | 150. | 528. | Germaine and Haken, 1969 | Celite 560; Column length: 3.7 m |
Packed | Apiezon L | 130. | 525. | Wehrli and Kováts, 1959 | Celite; Column length: 2.25 m |
Packed | Apiezon L | 70. | 532. | Wehrli and Kováts, 1959 | Celite; Column length: 2.25 m |
Kovats' RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | SE-30 | 552. | Chretien and Dubois, 1978 | Program: not specified |
Normal alkane RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | Methyl Silicone | 552. | Du and Feng, 2008 | Program: not specified |
Capillary | SE-30 | 573. | Vinogradov, 2004 | Program: not specified |
Capillary | Polydimethyl siloxane | 562. | Spanier, Shahidi, et al., 2001 | Program: not specified |
Capillary | SPB-1 | 559. | Flanagan, Streete, et al., 1997 | 60. m/0.53 mm/5. μm, He; Program: 40C(6min) => 5C/min => 80C => 10C/min => 200C |
Capillary | SPB-1 | 559. | Strete, Ruprah, et al., 1992 | 60. m/0.53 mm/5.0 μm, Helium; Program: 40 0C (6 min) 5 0C/min -> 80 0C 10 0C/min -> 200 0C |
Capillary | SPB-1 | 567. | Strete, Ruprah, et al., 1992 | 60. m/0.53 mm/5.0 μm, Helium; Program: not specified |
Capillary | OV-1 | 567. | Ramsey and Flanagan, 1982 | Program: not specified |
Normal alkane RI, polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | HP-Innowax | 838. | Narain, Galvao, et al., 2007 | 30. m/0.25 mm/0.25 μm, He; Program: 30C(5min) => 7C/min => 100C(5min) => 1C/min => 130C => 10C/min => 195C(45min) |
Capillary | HP-Innowax | 840. | Narain, Galvao, et al., 2007 | 30. m/0.25 mm/0.25 μm, He; Program: 30C(5min) => 7C/min => 100C(5min) => 1C/min => 130C => 10C/min => 195C(45min) |
Capillary | Carbowax 20M | 838. | Vinogradov, 2004 | Program: not specified |
Capillary | Carbowax 400, Carbowax 20M, Carbowax 1540, Carbowax 4000, Superox 06, PEG 20M, etc. | 851. | Waggott and Davies, 1984 | Hydrogen; Column length: 50. m; Column diameter: 0.32 mm; Program: not specified |
Capillary | Carbowax 20M | 883. | Ramsey and Flanagan, 1982 | Program: not specified |
References
Go To: Top, Gas phase ion energetics data, Gas Chromatography, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G.,
Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update,
J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018
. [all data]
Benoit, Harrison, et al., 1977
Benoit, F.M.; Harrison, A.G.; Lossing, F.P.,
Hydrogen migrations in mass spectrometry III-Energetics of formation of [R'CO2H2]+ in the mass spectra of R'CO2R,
Org. Mass Spectrom., 1977, 12, 78. [all data]
Benoit and Harrison, 1977
Benoit, F.M.; Harrison, A.G.,
Predictive value of proton affinity. Ionization energy correlations involving oxygenated molecules,
J. Am. Chem. Soc., 1977, 99, 3980. [all data]
VanRaalte and Harrison, 1963
VanRaalte, D.; Harrison, A.G.,
Ionization and dissociation of formate esters by electron impact,
Can. J. Chem., 1963, 41, 2054. [all data]
Fernández-Sánchez, García-Domínguez, et al., 1987
Fernández-Sánchez, E.; García-Domínguez, J.A.; García-Muñoz, J.; Menéndez, V.; Molera, M.J.,
Prediction of gas chromatographic retention indices on binary mixed stationary phases,
An. Quim., 1987, 83, 56-58. [all data]
Bogoslovsky, Anvaer, et al., 1978
Bogoslovsky, Yu.N.; Anvaer, B.I.; Vigdergauz, M.S.,
Chromatographic constants in gas chromatography (in Russian), Standards Publ. House, Moscow, 1978, 192. [all data]
Ashes and Haken, 1974
Ashes, J.R.; Haken, J.K.,
Gas chromatography of homologous esters. VI. Structure-retention increments of aliphatic esters,
J. Chromatogr., 1974, 101, 1, 103-123, https://doi.org/10.1016/S0021-9673(01)94737-5
. [all data]
Mira and Sanchez, 1970
Mira, J.M.; Sanchez, L.G.,
Polarity of the Gas Chromatographic Stationary Phases and Retention Indices of Aliphatic Esters, Ketones and Alcohols,
Anal. Chim. Acta., 1970, 50, 2, 315-321, https://doi.org/10.1016/0003-2670(70)80071-X
. [all data]
Germaine and Haken, 1969
Germaine, R.W.; Haken, J.K.,
Gas chromatography of homologous esters. Part 1. Simple aliphatic esters,
J. Chromatogr., 1969, 43, 33-42, https://doi.org/10.1016/S0021-9673(00)99162-3
. [all data]
Wehrli and Kováts, 1959
Wehrli, A.; Kováts, E.,
Gas-chromatographische Charakterisierung ogranischer Verbindungen. Teil 3: Berechnung der Retentionsindices aliphatischer, alicyclischer und aromatischer Verbindungen,
Helv. Chim. Acta, 1959, 7, 7, 2709-2736, https://doi.org/10.1002/hlca.19590420745
. [all data]
Chretien and Dubois, 1978
Chretien, J.R.; Dubois, J-E.,
Topological Analysis: A Technique for the Physico-Chemical Exploitation of Retention Data in Gas-Liquid Chromatography,
J. Chromatogr., 1978, 158, 43-56, https://doi.org/10.1016/S0021-9673(00)89954-9
. [all data]
Du and Feng, 2008
Du, X.; Feng, C.,
Correlativity research between topological dyeing index and gas chromatography retention index of fatty esters,
J. Petrochem. Univ. (Chinese), 2008, 21, 1, 16-20. [all data]
Vinogradov, 2004
Vinogradov, B.A.,
Production, composition, properties and application of essential oils, 2004, retrieved from http://viness.narod.ru. [all data]
Spanier, Shahidi, et al., 2001
Spanier, A.M.; Shahidi, F.; Par; iment, T.H.; Mussinan, C.,
Food Flavors and Chemistry. Advances of the New Millenium, Royal Soc. Chem., 2001, 666. [all data]
Flanagan, Streete, et al., 1997
Flanagan, R.J.; Streete, P.J.; Ramsey, J.D.,
Volatile Substance Abuse, UNODC Technical Series, No 5, United Nations, Office on Drugs and Crime, Vienna International Centre, PO Box 500, A-1400 Vienna, Austria, 1997, 56, retrieved from http://www.odccp.org/pdf/technicalseries1997-01-011.pdf. [all data]
Strete, Ruprah, et al., 1992
Strete, P.J.; Ruprah, M.; Ramsey, J.D.; Flanagan, R.J.,
Detection and identification of volatile substances by headspace capillary gas chromatography to aid the diagnosis of acute poisoning,
Analyst, 1992, 117, 7, 1111-1127, https://doi.org/10.1039/an9921701111
. [all data]
Ramsey and Flanagan, 1982
Ramsey, J.D.; Flanagan, R.J.,
Detection and Identification of Volatile Organic Compounds in Blood by Headspace Gas Chromatography as an Aid to the Diagnosis of Solvent Abuse,
J. Chromatogr., 1982, 240, 2, 423-444, https://doi.org/10.1016/S0021-9673(00)99622-5
. [all data]
Narain, Galvao, et al., 2007
Narain, N.; Galvao, M.S.; Madruga, M.S.,
Volatile compounds captured through purge and trap technique in caja-umbu (Spondias sp.) fruits during maturation,
Food Chem., 2007, 102, 3, 726-731, https://doi.org/10.1016/j.foodchem.2006.06.003
. [all data]
Waggott and Davies, 1984
Waggott, A.; Davies, I.W.,
Identification of organic pollutants using linear temperature programmed retention indices (LTPRIs) - Part II, 1984, retrieved from http://dwi.defra.gov.uk/research/completed-research/reports/dwi0383.pdf. [all data]
Notes
Go To: Top, Gas phase ion energetics data, Gas Chromatography, References
- Symbols used in this document:
AE Appearance energy - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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