Mesomerisms

Part of speech: noun

Definitions

1. A term that refers to the intermediate forms of resonance structures in organic chemistry
2. Describing the delocalization of electrons across adjacent atoms that contributes to the stability of molecules
3. Indicating different plausible arrangements of electrons in a molecule that influence its chemical properties and reactivity

Etymology: "Mesomerisms" is the plural of "mesomerism," a chemistry term for the electron arrangements that a molecule can be described by when no single structure fully accounts for its bonding. The plural form simply refers to several such arrangements considered together. The noun itself is built from "meso-" (from Greek "mesos," meaning "middle" or "intermediate") and "-merism," a suffix derived from Greek "meros," meaning "part," which chemists used to describe a substance's structural components.

Synonyms: resonances, delocalizations