chemistry

Stephen Hanessian

Stephen Hanessian 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 Stephen Hanessian rather than just read about it. In short: Stephen Hanessian, OC, FRSC, (born April 25, 1935) is a chemist and professor of Canadian and United States citizenship born in Alexandria, Egypt. His research group at Université de Montréal is well known for developing synthetic methodologies, as well as natural product total synthesis.

Key takeaways

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

Reference excerpt

Stephen Hanessian, OC, FRSC, (born April 25, 1935) is a chemist and professor of Canadian and United States citizenship born in Alexandria, Egypt. His research group at Université de Montréal is well known for developing synthetic methodologies, as well as natural product total synthesis. In addition, his group developed Chiron, a computer program used by organic chemists for synthetic planning. He earned his Ph.D. at Ohio State University in 1960, under the direction of M. L. Wolfrom. He worked as a researcher for Parke-Davis & Co. in Ann Arbor, Michigan until 1968. In 1969 he joined Université de Montréal. Since 2000, he has also been an adjunct professor at University of California, Irvine.

Awards 1974 - Merck Sharpe & Dohme Award, Chemical Institute of Canada 1982 - Hudson Award, American Chemical Society 1987 - Urgel Archambault Award 1988 - CIC Palladium Medal, Chemical Institute of Canada 1988 - Alfred Bader Award in organic chemistry, Canadian Society for Chemistry 1988 - Fellow of the Royal Society of Canada 1991 - Bell Canada-Forum Award 1991 - Prix Marie-Victorin 1992 - E. Smissman Medal, University of Kansas 1993 - M. L. Wolfrom Award, American Chemical Society 1996 - Arthur C. Cope Scholar Award, American Chemical Society 1997 - Izaak-Walton-Killam Award 1997 - Compagnon Lavoisier, Ordre des chimistes du Québec 1998 - Officer of the Order of Canada

External links Research group homepage Chiron software homepage A video interview of Professor Hanessian

Illustrations

Worked examples

Example 1 — a first encounter with Stephen Hanessian

Start with the simplest possible case. Write down what Stephen Hanessian 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 Stephen Hanessian 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 Stephen Hanessian 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 Stephen Hanessian

In research: Stephen Hanessian 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 Stephen Hanessian 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: Stephen Hanessian is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1935 births, Canadian chemists, Canadian people of Armenian descent, so understanding it makes those chapters shorter.
In everyday life: Look for Stephen Hanessian 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 Stephen Hanessian in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Stephen Hanessian 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 Stephen Hanessian out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Stephen Hanessian in simple terms?

Why does Stephen Hanessian 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 Stephen Hanessian?

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 Stephen Hanessian.