chemistry

Wilhelm Haarmann

Wilhelm Haarmann is a chemistry topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Wilhelm Haarmann rather than just read about it. In short: Gustav Ludwig Friedrich Wilhelm Haarmann (24 May 1847 – 6 March 1931) was a German chemist and together with Karl Reimer and Ferdinand Tiemann as scientific consultant founded the Haarmann & Reimer chemical plant for the production of vanillin. Vanillin is the primary flavor component of vanilla and one of the most widely used flavoring agents in the food and fragrance industries.

Key takeaways

Wilhelm Haarmann belongs to chemistry; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Wilhelm Haarmann to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Wilhelm Haarmann from memory before moving on to harder problems.

Reference excerpt

Gustav Ludwig Friedrich Wilhelm Haarmann (24 May 1847 – 6 March 1931) was a German chemist and together with Karl Reimer and Ferdinand Tiemann as scientific consultant founded the Haarmann & Reimer chemical plant for the production of vanillin. Vanillin is the primary flavor component of vanilla and one of the most widely used flavoring agents in the food and fragrance industries. Beginning in 1866, Haarmann studied at the Mining academy Clausthal later he changed to the University of Göttingen. He joined August Wilhelm von Hofmann 1869 at the University of Berlin. He received his PhD in Göttingen 1872. Together with Ferdinand Tiemann, both working with Hoffmann, Haarmann founded 1875 Haarmann's Vanillinfabrik, producing vanillin from coniferin. The Reimer-Tiemann reaction discovered by Karl Reimer opened an alternative path to vanillin and Reimer joined the company which was renamed to Haarmann & Raimer. Haarmann & Raimer was bought by the Bayer AG in 1953 and became an independent company again in 2003 under the name Symrise.

References

Max Bodenstein (1931). "Sitzung 9. März 1931". Berichte der Deutschen Chemischen Gesellschaft (A and B Series). 64 (4): A37–A41. doi:10.1002/cber.19310640440.

Illustrations

Worked examples

Example 1 — a first encounter with Wilhelm Haarmann

Start with the simplest possible case. Write down what Wilhelm Haarmann claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Wilhelm Haarmann before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Wilhelm Haarmann ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Wilhelm Haarmann

In research: Wilhelm Haarmann appears in chemistry research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Wilhelm Haarmann in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Wilhelm Haarmann is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1847 births, 1931 deaths, 19th-century German chemists, so understanding it makes those chapters shorter.
In everyday life: Look for Wilhelm Haarmann outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Wilhelm Haarmann in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Wilhelm Haarmann means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Wilhelm Haarmann out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Wilhelm Haarmann in simple terms?

Why does Wilhelm Haarmann matter?

Because it connects several chemistry ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Wilhelm Haarmann?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Wilhelm Haarmann.