Protonated p-Benzoquinone.

The structure and energetics of protonated p-benzoquinone (pBQ) have been investigated using high-pressure mass spectrometry and ab initio calculations. The experimental proton affinity of pBQ is 801.4 +/- 8.

Kinetic Mass Spectrometric Investigation of the Reactions of Ions With Some Simple Polar Molecules at Thermal Energies.

The interactions of ions from neopentane with some simple polar molecules have been investigated in a high pressure photoionization mass spectrometer at thermal kinetic energies. Proton transfer was found to occur from to acetone, ammonia, and the various methylamines, but not to molecules having estimated proton affinities < 195 kcal/mol (815 kJ/mol). Macroscopic thermal rate coefficients are reported for the various proton transfer reactions, all of which are on the order of 10 cm/molecule · second.

Kinetic Mass Spectrometric Investigation of the Ion-Molecule Reactions Occurring in C and C Alkanes Following Photoionization at 106.7 and 104.8 nm.

The photoionization of C and C alkanes has been investigated at 106.7 and 104.8 nm in a mass spectrometer specifically designed for the investigation of ion-molecule reactions occurring at thermal kinetic energies.