vinylic groups
The vinyl group (CH2=CH–) and derivatives formed by substitution. Informally, a group, such as –OH, attached to the free valence of a (substituted) vinyl group is sometimes referred to as 'vinylic'.
PAC, 1995, 67, 1307. 'Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)' on page 1374 (