photon chemistry

Iupac (International Union of pure and applied chemistry) IUPAC is very easy and follow hole world for nomenclature, substitute naming, and other chemistry related work.  IUPAC nomenclature for hydrocarbons and alkyl halied and all functional groups naming....  Classification of hydrocarbons Hydrocarbons divided into two types 1. Open chain        A. Saturated.         B. Unsaturated                                          i. Alkene   ii. Alkyne 2. Close chain      A. Aromatic.                            all are alkanes General formula of alkane is CnH2n+2 General formula of alkene is CnH2n General formula of alkyne is CnH2n-2 Rules of nomenclature  1. Select longest carbon carbon chain (not need to strate)