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Abstract
The purpose of this paper is to extend the application of the orbital exchange method to a series of molecules containing carbon. The paper describes the calculation of bond length, bond strength and dipole moment in ethane, ethylene, acetylene, benzene, allene, hydrogen cyanide, formaldehyde, floromethane, tetrafloromethane and floromethylidyne (CF). This work explains how the s bonding orbital coefficients in such molecules as ethylene and acetylene are maximized to enable shorter and stronger carbon-carbon bonds. Pi orbital resonance of the form [C-C+,CC,C+C-] in ethylene, acetylene, and benzene is described and quantified. Pi orbital resonance in HCN [CN,C+N-] and H2CO [CO,C+O-] and sigma orbital resonance in H3CF [H3CF, H3C+F-], CF4 and CF is quantified. Secondary interactions are described. Calculated bond lengths are generally within 0.003Å of observed values. Calculated molecular energies are within 2%.
