Abstract
A simplified Hückel-type molecular-orbital (MO) model for the valence electrons of saturated hydrocarbons is proposed and the consequent eigenvalue spectrum considered. A first foundational result is obtained, which every chemist “knows”, namely that: alkanes are stable, with half their (Hückel-type MO) eigenvalues positive and half negative.
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Notes
Amongst these “early mathematicians” one might also be tempted to include A. A. Cayley for his somewhat more widely recognized work on alkane enumeration [2]. But though he evidently learned of this matter from Sylvester [24], Cayley stuck with the ordinary molecular graph (as in Fig. 1), or yet more abbreviatedly with the H-deleted C-network graph.
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The authors acknowledge the Welch Foundation of Houston, Texas, for support for this research, via grant BD-0894.
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Klein, D.J., Larson, C.E. Eigenvalues of saturated hydrocarbons. J Math Chem 51, 1608–1618 (2013). https://doi.org/10.1007/s10910-013-0168-1
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DOI: https://doi.org/10.1007/s10910-013-0168-1