R22. A. Greenberg and J.F. Liebman, “Structure/Energy Studies on Substituted Strained Molecules,” in Molecular Structure: Chemical Reactivity and Biological Activity (ed. J.J. Stezowski, J.-L. Huang and M.-C. Shao), Oxford University Press, Oxford, 313-318 (1988).

R21. A. Greenberg, P.-C. Lyu, J.F. Liebman and C.J. Cheer, “Structural Studies of Substituted Prismanes and Nitrocyclopropenes: Comparisons of Ab-Initio Calculations, Experimental X-Ray Data and 6th Analysis of Structural Trends,” Report Annual Working Group on Synthesis of High Energy Density Materials, US Army Armament Research, Development and Engineering Center, (AARDEC, May, 1987), 40-62 (1988).

R20. J.F. Liebman, J.S. Chickos and J. Simons, “Aspects of the Estimation of Physical Properties of Boron Compounds by the Use of Isoelectronic and Plemeioelectronic Analogies” in Advances in Boron and the Boranes: A volume in honor of Anton B. Burg (ed. J.F. Liebman, A. Greenberg and R.E. Williams), VCH Publishers, Inc., New York, 491-516 (1988).

R19. A. Greenberg, W.J. Simonsick, Jr. and J.F. Liebman, “Experimental and Calculated Reactivity Parameters of Potential Environmental Significance for Nitro-Polycyclic Aromatic Hydrocarbons” in Proceedings of the 1987 EPA/APCA Symposium on the Measurement of Toxic Air Pollutants (ed. R.K.M. Jayanty and S. Hochheiser), APCA, Pittsburgh, 329-340 (1987).

R18. J.F. Liebman and A. Greenberg, “Cyclopropanes with Additional Strain,” in The Chemistry of the Cyclopropyl Functional Group (ed. Z. Rappoport), Wiley, Chichester, 1083-1119 (1987).

R17. J.F. Liebman, “Estimation and Mimicry in Cage and Substituted Cage Energetics.” Report Working Group on Synthesis of High Energy Density Materials, US Army Armament Munitions and Chemical Command (ARDEC, May, 1986), 53-71 (1987).

R16. J.F. Liebman, “Are the Numerical Magnitudes of Proton Affinities Intuitively `Plausible'?” in Molecular Structure and Energetics: Biophysical Aspects, Vol. 4, (ed. J.F. Liebman and A. Greenberg), VCH Publishers, Inc., Deerfield Beach, FL and New York, NY, 49-70 (1987).

R15. J.F. Liebman, “The Limiting Values of Ionization Potentials of 1-Substituted Alkanes,” in Structure/Reactivity and Thermochemistry of Ions (ed. P. Ausloos and S.G. Lias), NATO ASI, Series C, Vol. 193, D. Reidel Publishing Co., Dordrecht, 371-373 (1987).

R14. J.F. Liebman, “Estimation of Phase Change Enthalpies for Deriving Thermochemical Properties of Organic Compounds,” in Structure/Reactivity and Thermochemistry of Ions (ed. P. Ausloos and S.G. Lias), NATO ASI, Series C, Vol. 193, D. Reidel Publishing Co., Dordrecht, 404-406 (1987).

R13. J.F. Liebman and D. Van Vechten, “Universality: Interrelationships among Heats of Formation, Resonance Energies and Strain Energies,” in Molecular Structure and Energetics: Physical Measurements, Vol. 2, (ed. J.F. Liebman and A. Greenberg), VCH Publishers, Inc., Deerfield Beach, FL and New York, NY, 315-374 (1987).

R12. J.F. Liebman, “Macroincrementation: A ‘Holistic' Estimation Approach,” in Molecular Structure and Energetics: Studies of Organic Molecules, Vol. 3, (ed. J.F. Liebman and A. Greenberg), VCH Publishers, Inc., Deerfield Beach, FL and New York, NY, 267-328 (1986).

R11. J.F. Liebman and J. Simons, “Carbenes: A Study in Quantitative and Qualitative Theory,” in Molecular Structure and Energetics: Chemical Bonding Models, Vol. 1, (ed. J.F. Liebman and A.