(organic chemistry) Any acyclic saturated hydrocarbon (methane, ethane, etc.).
The carbon chain of an alkane may be linear or branched, but must not contain loops (cycles); its chemical formula is of the form CₙH₂ₙ₊₂.
2012, Chulsung Bae, Chapter 3: Catalytic Carbon-Boron Bond Formation via Activation of Alkane C-H Bonds, Pedro J. Pérez, Alkane C-H Activation by Single-Site Metal Catalysis, Springer, page 73,
Alkanes are extremely unreactive toward nucleophiles and electrophiles because they are composed of nonpolar, strong, saturated C–H and C-C bonds.