Alfred Werner (1866 - 1919)
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In 1893, Werner was a 26-year-old unsalaried lecturer at the Swiss Federal Institute of Technology. After having given considerable thought to the atomic and molecular compounds of Kekulé, in 1893 Werner proposed a new explanation of the structure and properties of the metal ammines. Werner was an impulsive, intuitive worker who preferred qualitative tests rather than the quantitative methods favored by Jørgensen.