different between methine vs heteroarene

English

methine (plural methines)

(organic chemistry) The tervalent functional group, -CH=, having one single bond and one double bond

hetero- +? arene

heteroarene (plural heteroarenes)

(chemistry) any heterocyclic compound formally derived from an arene by replacement of one or more methine and/or vinylene groups by trivalent or divalent heteroatoms respectively in such a way as to retain its aromaticity

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