Reactions ------Classification Reactions can be classified as carbon-carbon bond formations construct complex molecules from simple starting materials In general,these reactions are the most difficult and temperamental to carry out. reactions are so important that they are named after the scientists who developed them (e.g.Grignard and Aldol reactions) Also classified according to the process or mechnism 1 Reactions ------Classification Reactions can be classified as carbon-carbon bond formations construct complex molecules from simple starting materials In general, these reactions are the most difficult and temperamental to carry out. reactions are so important that they are named after the scientists who developed them (e.g. Grignard and Aldol reactions) Also classified according to the process or mechnism