The Molecule Benzene, Kekules Dream, and Resonance Theory

5 The Molecule Benzene, Kekule s Dream, and Resonance Theory 

SCHEME 4.R.2 The two equivalent structures, (a) and (b), of benzene obtained by the alternative modes of clicking the connectivities of six HC fragments into a hexagonal molecule. 

SCHEME 4.R.4 (a) A cubic lattice of metal atoms (shown as greenish spheres), as found, for instance, in lithium (Li). Due to the uniform distances between the atoms, the bonding in metals is collective, (b) An example of the collective bonding of Li. Li is a single-connector fragment, and, hence, Lis collectively bonded due to the resonance between the two localized electronic structures, as the circle represents. 

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