Parr, Robert G. Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina.
Last reviewed:January 2020
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A phenomenon in which the most loosely held bonding electrons of some molecules serve to bind not two but several atoms. This contrasts with localization, a characteristic of ordinary single bonds, as in the normal paraffins, for example, methane (CH4); in ethane, (C2H6); or in the molecules water (H2O) and ammonia (NH3). See also: Chemical bonding
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