chemistry

MTFEM

MTFEM 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 MTFEM rather than just read about it. In short: MTFEM, also known as 4-(2,2,2-trifluoroethoxy)-2,5-dimethoxyamphetamine, is a serotonin receptor modulator of the phenethylamine, amphetamine, and DOx families. It is a derivative of the DOx psychedelics TMA-2 and MEM in which the 4-position substituent has been extended.

Key takeaways

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

Reference excerpt

MTFEM, also known as 4-(2,2,2-trifluoroethoxy)-2,5-dimethoxyamphetamine, is a serotonin receptor modulator of the phenethylamine, amphetamine, and DOx families. It is a derivative of the DOx psychedelics TMA-2 and MEM in which the 4-position substituent has been extended. The drug is also the α-methyl or amphetamine analogue of 2C-O-22.

Use and effects In humans, MTFEM produced stimulant effects at a dose of 2.5 mg and had a duration of 12 hours. Its full effects in humans were not determined and it was estimated that its human dose range would be 10 mg or more. Along with TMA-2 and MEM, it is one of the few compounds in its series tested and known to be active in humans.

Pharmacology

Pharmacodynamics MTFEM acts as a potent modulator of the serotonin 5-HT2 receptors. Its affinities (Ki) were 460 nM for the serotonin 5-HT2A receptor and 2,400 nM for the serotonin 5-HT2C receptor, whereas its activational potencies (EC50Tooltip half-maximal effective concentration (EmaxTooltip maximal efficacy)) were 19 nM (80%) at the serotonin 5-HT2A receptor and 200 nM (4.8%) at the serotonin 5-HT2B receptor. Hence, MTFEM is a near-full agonist of the serotonin 5-HT2A receptor but a near-silent antagonist of the serotonin 5-HT2B receptor. Besides the serotonin 5-HT2 receptors, the drug showed little to no activity at various other assessed targets, such as the monoamine transporters. It does not appear to have been tested for psychedelic-like activity in animals.

History MTFEM was first described in the scientific literature by Daniel Trachsel in 2012. Its psychoactive effects in humans were reported by Trachsel and colleagues in 2013. Subsequently, it was characterized in more detail by a group including Trachsel and Matthias Liechti in 2019. The compound's name is said to derive from its benzene ring substituents, "methoxy trifluoroethoxy methoxy".

Society and culture

Legal status

Canada MTFEM is a controlled substance in Canada under phenethylamine blanket-ban language.

See also DOx (psychedelics) MEM § Derivatives

References

External links MTFEM - Isomer Design

Illustrations

Worked examples

Example 1 — a first encounter with MTFEM

Start with the simplest possible case. Write down what MTFEM 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 MTFEM 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 MTFEM 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 MTFEM

In research: MTFEM 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 MTFEM 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: MTFEM is common in secondary-school and first-year university syllabi. It links to neighbouring topics 5-HT2A agonists, 5-HT2B antagonists, DOx (psychedelics), so understanding it makes those chapters shorter.
In everyday life: Look for MTFEM 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 MTFEM in 20 minutes

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

Frequently asked questions

What is MTFEM in simple terms?

Why does MTFEM 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 MTFEM?

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 MTFEM.