different between vinylene vs heteroarene

English

vinylene (countable and uncountable, plural vinylenes)

(chemistry) The divalent radical, -CH=CH-, formally derived by removing a hydrogen atom from each carbon of an ethylene molecule.

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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