Univalent groups derived from alkanes 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 alkanes form a subclass of normal alkyl (n-alkyl) groups H(CH2)n. The groups RCH2, R2CH (R ≠ H), and R3C (R ≠ H) are primary, secondary and tertiary alkyl groups, respectively., ühevalentsed süsivesinikrühmad üldvalemiga CnH2n+1 , mis tulenevad alkaanidest ühe vesiniku aatomi elimineerimisel molekulist