Werner, Alfred

19th Century
Born: Mulhouse (France), 1866 
Died: Zürich (Switzerland), 1919
Werner earned his Ph.D. at the University of Zürich in Switzerland (1890) and did postdoctoral work with Berthelot in Paris. Beginning 1891 he developed a co-ordination theory of molecular structure. Co-ordination bonds were often spoken of as secondary valence. In 1913 he was awarded the Nobel Prize for chemistry. 

The Nobel Prize in Chemistry 1913

"in recognition of his work on the linkage of atoms in molecules by which he has thrown new light on earlier investigations and opened up new fields of research especially in inorganic chemistry"