Predictions of Physical Properties with the Two Models

Pauling, L. in Theoretical Organic Chemistry, The Kekule Symposium Butterworths Scientific Publications London, 1959 p. 1. 

Overlap of sp hybrid orbitals in the bent bond description of ethene. 

The alkanes, alkenes, and alkynes are not usually considered to be acidic, but it is possible to measure rates and equilibria of proton removal in solution and in the gas phase (Chapter 7). Table 1.15 shows some experimental data for acidities as indicated by the enthalpy change for detachment of a 

Robinson, E. A. Gillespie, R. J. /. Chem. Educ. 1980,57,329 described these calculations as well as the use of molecular models with bent bonds to measure the internuclear distances. 

Data from the compilation by Bartmess, J. E. in Mallard, W. G. Linstrom, P. J., Eds. NIST Webbook, NIST Standard Reference Database Number 69 National Institute of Standards and Technology Gaithersburg, MD (http //webbook.nist.gov). 

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