Reactions of CHF/sub 2//sup +/ with n-donor bases by ion cyclotron resonance spectroscopy. The proton affinity of difluorocarbene

Journal Article · Tue Nov 11 23:00:00 EST 1975 · J. Am. Chem. Soc.; (United States)

DOI:https://doi.org/10.1021/ja00856a014· OSTI ID:7368425

Vogt, J; Beauchamp, J L

The gas-phase ion--molecule reactions of CHF/sub 2//sup +/ with n-donor bases were investigated using the techniques of ion cyclotron resonance spectroscopy. CHF/sub 2//sup +/ reacts only by proton transfer with CH/sub 3/CN, CH/sub 3/CHO, CH/sub 3/OH, AsH/sub 3/, and CH/sub 2/O. While CHF/sub 2//sup +/ with excess translational and internal energy undergoes proton transfer to HCN, ground state CHF/sub 2//sup +/ does not react. CHF/sub 2//sup +/ is also unreactive with H/sub 2/O. Rate constants for ion-molecule reactions in the pure systems and for the proton transfer reactions are reported. The proton affinity of difluorocarbene is determined to be 172 +- 2 kcal/mole which is 7 kcal/mole lower than calculated from previously reported thermodynamic data. The possible use of CHF/sub 2//sup +/ as a reagent ion for chemical ionization is discussed, and some reservations are noted. (auth)

• Research Organization: California Inst. of Tech., Pasadena
• OSTI ID: 7368425
• Journal Information: J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 97:23; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ACETALDEHYDE
ALCOHOLS
ALDEHYDES
ARSENIC COMPOUNDS
ARSENIC HYDRIDES
BARYONS
CATIONS
CHARGED PARTICLES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CYCLOTRON RESONANCE
ELEMENTARY PARTICLES
FERMIONS
FLUIDS
FLUORINATED ALIPHATIC HYDROCARBONS
FORMALDEHYDE
GASES
HADRONS
HALOGENATED ALIPHATIC HYDROCARBONS
HYDRIDES
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
IONS
KINETICS
METHANOL
MOLECULES
NITRILES
NUCLEONS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PROTONS
REACTION KINETICS
RESONANCE
SPECTROSCOPY