https://doi.org/10.1351/goldbook.A00228
Univalent groups derived from @A00222@ by removal of a hydrogen atom from any carbon atom –CnH2n+1. The groups derived by removal of a hydrogen atom from a terminal carbon atom of unbranched @A00222@ form a subclass of normal alkyl (n-alkyl) groups H(CH2)n. The groups , (R ≠ H), and (R ≠ H) are primary, secondary and tertiary alkyl groups, respectively.
See also:
cycloalkyl groups
, hydrocarbyl groups