Toll definition, a payment or fee exacted by the state, the local authorities, etc., for some right or privilege, as for passage along a road or over a bridge. See more. Dictionary.com
The International Union of Pure and Applied Chemistry (IUPAC, /ËaÉªjuËpÃ¦k/ or /ËjuËpÃ¦k/) is an international federation of National Adhering Organizations that represents chemists in individual countries. It is a member of the International Council for Science (ICSU).
This compound has four carbon atoms lined up one after the other, so its IUPAC name is butane. C-C - C-C butane The IUPAC name for the other structural formula is methylpropane (or 2-methylpropane). We come up with this name by looking at the fact that we have three carbon atoms in a row.