 It is sometimes incorrectly claimed that Dewar proposed his structure as the true structure of benzene.In fact, Dewar merely wrote the structure as one of seven possible isomers and believed that his experiments on benzene supported the (correct) structure that had been proposed by Kekulé.After the development of valence bond theory in 1928, benzene was described primarily using its two major resonance contributors, the two Kekulé structures.