Alkane (${\mathrm{C}}_n{\mathrm{H}}_{2n+2}$)

An acyclic saturated hydrocarbon. The formula applies to a connected neutral alkane with $n\ge 1$ carbon atoms.

The 2-methylbutan-2-yl group, attached through its tertiary carbon.

A saturated seven-carbon hydrocarbon, ${\mathrm{C}}_7{\mathrm{H}}_{16}$; the normal isomer is a weakly coordinating solvent.

A small branched hydrocarbon with no conventional hydrogen-bond acceptor site. Its transfer into water lacks the compensating polar interactions available to oxygen- or nitrogen-containing comparators.