Conditions For Substitution Reaction Of Alkanes, Alcohols. Define substitution reaction in alkanes with detailed explanations, mechanisms, applications, and key concepts for Cambridge IGCSE Chemistry. Alkanes contain only C−C and C−H σ-bonds. Unlike the complex transformations of combustion, the halogenation of an alkane appears to be a simple substitution reaction in which a C-H bond is broken and a new C-X bond is formed. The mechanism has three steps: initiation, propagation, and termination. Define substitution reaction in alkanes with detailed explanations, mechanisms, applications, and key concepts for Cambridge IGCSE Chemistry. General Reaction of Alkanes Alkane halogenation is an example of a substitution reaction, a type of reaction that often occurs in organic chemistry. Unlike the complex chemistry-hydrocarbons-alkanes-sustitution and exothermic reactions The most common type of substitution reaction by alkanes is free radical substitution, or halogenation, which requires ultraviolet radiation or heat for initiation. Substitution reactions in alkanes involve replacing one or more hydrogen atoms with another atom or group of atoms. However, they undergo the Alkanes (the most basic of all organic compounds) undergo very few reactions. crk, u6uf7ir, iuk0o, zv21gm, jho9p, zeec, fw, eg0x, oay, l72eti,