Basicity and ion-molecule reactions of trimethylarsine in the gas phase determined by ion cyclotron resonance spectroscopy

Journal Article · Sun Nov 30 23:00:00 EST 1975 · Inorg. Chem.; (United States)

DOI:https://doi.org/10.1021/ic50154a004· OSTI ID:7199684

Hodges, R V; Beauchamp, J L

The gas-phase ion--molecule reactions of trimethylarsine were investigated by ion cyclotron resonance spectroscopy. Reaction pathways, rate constants, and product distributions were determined by the variation of electron energy and by trapped-ion and double-resonance techniques. The parent ion reacts with (CH/sub 3/)/sub 3/As to give (CH/sub 3/)/sub 5/As/sub 2//sup +/ and a methyl radical. The two principal fragment ions, (CH/sub 3/)/sub 2/As/sup +/ and C/sub 2/H/sub 4/As/sup +/, react to give the protonated parent ion and also undergo condensation reactions. The gas-phase basicity (proton affinity) of trimethylarsine was determined to be 209.3 kcal/mole (relative to PA(NH/sub 3/) = 201 kcal/mole) from investigations of proton-transfer equilibria. This result is consistent with previously established trends in the basicities of group 5 hydrides and their methyl derivatives. (auth)

• Research Organization: California Inst. of Tech., Pasadena
• OSTI ID: 7199684
• Journal Information: Inorg. Chem.; (United States), Journal Name: Inorg. Chem.; (United States) Vol. 14:12; ISSN INOCA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ARSENIC COMPOUNDS
CHARGED PARTICLES
CHEMICAL REACTIONS
FLUIDS
GASES
ION CYCLOTRON RESONANCE SPECTROSCOPY
ION SPECTROSCOPY
IONS
MASS SPECTRA
MOLECULES
ORGANIC ARSENIC COMPOUNDS
ORGANIC COMPOUNDS
SPECTRA
SPECTROSCOPY