Edward P. L. Hunter and Sharon G. Lias,
Physical and Chemical Properties Division, Chemical Science and Technology Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899

The available data on gas-phase basicities and proton affinities of approximately 1700 molecular, radical and atomic neutral species are evaluated and compiled. Tables of the data are sorted (1) according to empirical formula and (2) according to evaluated gas basicity.

Sharon G. Lias, Center for Chemical Physics, National Bureau of Standards, Gaithersburg, Maryland 20899
John E. Bartmess, Department of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996-1600
Joel F. Liebman, Department of Chemistry, University of Maryland. Baltimore County Campus, Baltimore, Maryland 21228
John L. Holmes, Department of Chemistry, University of Ottawa, Ottawa, Ontario K1N 9B4, Canada
Rhoda D. Levin, Center for Chemical Physics, National Bureau of Standards, Gaithersburg, Maryland 20899
W. Gary Mallard, Center for Chemical Physics, National Bureau of Standards, Gaithersburg, Maryland 20899

Critically evaluated data on heats of formation of positive and negative ions in the gas phase are compiled and presented in these tables (GIANT tables), along with auxiliary information on ionization energies, proton affinities, electron affinities and acidities, as well as relevant thermochemistry of related neutral species. The literature coverage is through the middle of 1986. The criteria used in carrying out evaluations of data are described, and a short discussion is presented of special concerns for the thermochemistry of charged species.