Friedrich Wöhler

Friedrich Wöhler was a German chemist who transformed our understanding of the physical and biological worlds.

Born on July 31, 1800, in Eschersheim, Germany, he grew up with a deep interest in science and mineral collecting. His father was a veterinarian who provided him with a home laboratory for early experiments. Wöhler pursued higher education at Marburg University and later at Heidelberg University. While at Heidelberg, he studied under Leopold Gmelin, who helped him secure research training in Stockholm, Sweden. There, he worked with the famous chemist Jacob Berzelius. This mentorship began a lifelong professional bond. Wöhler even translated many of Berzelius's scientific writings into German to help share knowledge internationally.

In the field of inorganic chemistry, Wöhler was a master of isolating pure elements. He investigated more than twenty-five different chemical elements during his career. In 1827, he improved upon the work of Hans Christian Ørsted to isolate aluminium powder in pure form. He did this by substituting potassium metal for potassium amalgam during the reduction of aluminium chloride. By 1845, Wöhler demonstrated that this powder could be converted into solid balls of pure metallic aluminium.

In 1828, he also became the first to isolate beryllium in pure metallic form.

In that same year, he isolated the element yttrium.

He achieved these results by heating the anhydrous chlorides of these elements with potassium metal.

Wöhler's work also extended to identifying the true nature of various substances. In 1850, he determined that a substance previously thought to be metallic titanium was actually a mixture of titanium, carbon, and nitrogen. He successfully derived the purest form of titanium known at that time. He also worked with Sainte Claire Deville to isolate boron and silicon in crystalline forms.

Additionally, he and Heinrich Buff prepared the inorganic compound silane in 1856. Wöhler even studied meteorites, proving that some space rocks contain organic matter. He even built one of the best private collections of meteoric stones and irons in existence.

Perhaps his most famous contribution was to the field of organic chemistry. In 1828, Wöhler performed the "Wöhler synthesis." He heated ammonium cyanate to produce urea, an organic compound.

At the time, many scientists believed in vitalism. Vitalism was the theory that organic compounds could only be made by living organisms through a special "life force." Wöhler's ability to create urea in a lab from inorganic substances challenged this idea. He famously wrote to Berzelius that he could make urea without using any animal, such as a human or a dog. While some historians argue that his role in destroying vitalism was exaggerated, his work was undeniably a major milestone.

Wöhler and his colleague Justus Liebig also made breakthroughs regarding how atoms are organized. They studied the oil of bitter almonds to discover "compound radicals." These are groups of atoms, such as the benzoyl radical (C7H5O), that act as a single unit during chemical reactions. They also explored the concept of chemical isomerism. Isomerism is the idea that two different substances can have the exact same chemical composition but different structures.

To prove this, they compared silver fulminate and silver cyanate. Although both have the same composition, silver fulminate is explosive while silver cyanate is stable. This proved the existence of structural isomerism.

Beyond his research, Wöhler was a revolutionary educator. In 1836, he became a professor at the University of Göttingen, a position he held for 46 years. During his tenure, approximately 8,000 research students were trained in his laboratory. Unlike many professors of his era, Wöhler allowed his students to participate directly in his research. This practice helped normalize the idea of undergraduate and graduate-level research. His focus on hands-on laboratory experience helped establish the modern standard for chemistry education used in universities today.

Friedrich Wöhler's legacy is found in both the fundamental theories of chemistry and the way science is taught. His work helped bridge the gap between inorganic and organic chemistry. By showing that the same chemical rules apply to both, he helped build the foundation for modern molecular science. His vast output included about 275 books, papers, and editions. His scientific contributions were recorded in journals every year from 1820 until 1881. He remains one of the most influential figures in the history of chemical discovery.