mesoionic compound
Word Rarity
Very rare
Frequency: Zipf frequency 0.00 in modern English
28
Scrabble Score
17
Letters
4
Syllables
10
Unique Chars
Meaning
noun
any of a class of compounds having five-membered ring heterocycles (or their benzo derivatives) which possess a sextet of π-electrons in association with the atoms comprising the ring, but which cannot be represented by any one covalent or polar structure; typically the ring structure contains both positive and negative delocalised charges which cannot be associated with any one ring atom, and the negative charge can also be associated with a conjugated exocyclic atom (typically oxygen, sulfur, or nitrogen).