The Scottish chemist Archibald Scott Couper published a substantially similar theory nearly simultaneously, and the Russian chemist Aleksandr Butlerov did much to clarify and expand structure theory.
Kimiawan Skotlandia Archibald Scott Couper menerbitkan teori yang hampir sama di saat yang hampir bersamaan, dan kimiawan Rusia Aleksandr Butlerov banyak menjelaskan dan memperluas teori struktur.