Chapter 18 · Organic Chemistry
18.2Vitalism: The Difference between Organic and Inorganic
7 min · two checks
Predict
What did Wöhler’s synthesis of urea do to the idea that organic compounds need a living force?
The idea
- Define vitalism and why it was abandoned.
- Keep the modern meaning of organic.
Into the early 1800s, many chemists thought compounds from living things required a vital force and could not be made from mineral matter. Friedrich Wöhler’s preparation of urea, a compound of urine, from ammonium cyanate showed a biological molecule could be assembled without a kidney. Organic chemistry did not collapse. It became the chemistry of carbon, vital force not included.
The word survived and drifted. On a food label, “organic” means a farming standard. In this chapter it means “carbon-based compound,” usually containing C–H bonds. CO₂ and carbonates are often taught with inorganic chemistry even though they contain carbon. The boundary is historical and practical, not mystical. What matters is that carbon’s bonding rules are ordinary quantum chemistry, not a special life-only physics.
Keep these
- Vitalism claimed life was required to make organic molecules.
- Urea’s synthesis argued against that claim.
- In chemistry, organic means carbon compounds, not “pesticide-free.”