27. Three-center two-electron chemical bond.

A three-center two-electron bond is such a chemical bond when a pair of electrons is localized in the space between three atoms. Therefore, from a classical point of view, it is not easy to explain why a pair of electrons \u201cserves\u201d three nuclei at once. But, everything changes if we recall that the chemical bond is a standing de Broglie wave. Naturally, the energy of these oscillations is quantized according to Planck, that is, according to the formula ( E = h * \u03b3). Therefore, a chemical bond can be thought of as a standing wave between nuclei (atomic nuclei are the nodes of a standing wave). Moreover, and importantly, the number of nodes is not limited: there can be two (then this is a \u201cnormal\u201d chemical bond), and maybe three (then this is a three-center two-electron bond). The standing wave of a fixed string is perfectly quantized. Moreover, an integer number of half-waves (\u03bb / 2) will be stacked along the length of the string L ( L = (\u03bb / 2) * n, where n = 1, 2, 3\u2026).

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