hydrocarbylene groups

https://doi.org/10.1351/goldbook.H02890
Divalent groups formed by removing two hydrogen atoms from a @[email protected], the free valencies of which are not engaged in a double bond, e.g. 1,3-phenylene, –CH2CH2CH2 propane-1,3-diyl, –CH2@[email protected]
Source:
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1341 [Terms] [Paper]