Organic reaction

Types of chemical reactions A chemical reaction is a process that is usually characterized by a chemical change in which the starting materials (reactants) are different from the products. Chemical reactions tend to involve the motion of electrons, leading to the formation and breaking of chemical bonds. There are several different types of chemical reactions and more than one way of classifying them. Here are some common reaction types: Synthesis Reaction (Direct Combination) In a synthesis reaction two or more chemical species combine to form a more complex product. O + H2 ? H2O C + O2 CO2 Chemical Decomposition (Analysis Reaction) In a decomposition reaction a compound is broken into smaller chemical species. H2O ? H2 + O CO2 C + O2