Alkane Reactions Explained with Animations

Welcome to our exploration of halogenation reactions in organic chemistry.Halogenation occurs when an alkane reacts with a halogen molecule like chlorine or bromine.The reaction begins when UV light breaks the chlorine molecule into two radicals.This breaking of the chlorine-chlorine bond is called the initiation step.In the propagation step, a chlorine radical attacks the methane molecule, abstracting a hydrogen atom.This creates a methyl radical and HCl as a byproduct.The methyl radical then reacts with another chlorine molecule to form the chloromethane product.This completes one cycle of the propagation steps, forming chloromethane as the main product.The overall reaction produces chloromethane and hydrogen chloride.In complete combustion, methane reacts with oxygen to form carbon dioxide and water.This reaction releases a significant amount of energy, approximately 890 kilojoules per mole.The energy diagram shows how the energy changes throughout the reaction.However, when there isn't enough oxygen, incomplete combustion occurs, producing carbon monoxide and carbon instead.Carbon monoxide is particularly dangerous as it's an odorless, colorless gas that can be lethal.