https://doi.org/10.1351/goldbook.15263
Polymer prepared from a monomer containing the ethene-1,1-diyl group \(\gt\!\ce{C=CH2}\), formerly called vinylidene.
Notes:
- A macromolecule of a regular vinylidene polymer is described by the constitutional repeating unit: \(\ce{-CR^1R^2\bond{-}CH2\bond{-}}\), where \(\ce{R^1}\) and \(\ce{R^2}\) are each alkyl, aryl, heteroaryl, or halogen, such as by the units:
- Vinylidene is correctly defined as ethenylidene only, meaning a divalent attachment to the same atom of a senior group, i.e., it is the correct name for the group \(\ce{=C=CH2}\) but not for the group \(\gt\!\ce{C=CH2}\).