chemistry

TWEETIO

TWEETIO 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 TWEETIO rather than just read about it. In short: TWEETIO is a family of phenethylamine psychedelic drugs. They are analogues of the 2C drugs (4-substituted 2,5-dimethoxyphenethylamines) in which one or both of the methoxy groups at positions 2 and 5 of the phenyl ring have been lengthened to ethoxy groups.

Key takeaways

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

Reference excerpt

TWEETIO is a family of phenethylamine psychedelic drugs. They are analogues of the 2C drugs (4-substituted 2,5-dimethoxyphenethylamines) in which one or both of the methoxy groups at positions 2 and 5 of the phenyl ring have been lengthened to ethoxy groups. Examples include 2CD-2-EtO (a TWEETIO of 2C-D), 2CE-5-EtO (a TWEETIO of 2C-E), and 2CT2-5-EtO (a TWEETIO of 2C-T-2), among many others. The TWEETIO drugs are said to have been named in a humorous way by pronouncing the simplest structural form of "2-EtO-X". Limited human data are available on the TWEETIO compounds. In any case, some generalizations have been made, including that the 2-EtO compounds tend to have a shorter duration and decreased potency, the 5-EtO drugs tend to have enhanced potency and remarkably increased durations, and the 2,5-DiEtO drugs tend to be inactive. The TWEETIO compounds were developed by Darrell Lemaire as potential "smart drugs" in the 1970s or 1980s. The compounds were described in the scientific literature by Alexander Shulgin via personal communication with Lemaire in the 1990s and 2000s. It was said by Shulgin in 2003 that the propoxy analogues had not yet been synthesized. In 2023, the propoxy derivative ASR-2001 (2CB-5PrO) was reported by Nick Cozzi and Paul F. Daley of the Alexander Shulgin Research Institute. It is under development for potential medical use.

List and properties of TWEETIO drugs

Alexander Shulgin also described some of these compounds in additional detail in his book PiHKAL (Phenethylamines I Have Known and Loved). According to Shulgin in 2011, 2CB-5-EtO is not in the published scientific literature. In a 1994 literature review however, Shulgin described 2CB-5-EtO as being active but 2-fold less potent than 2C-B. ASR-2001 (2CB-5PrO), a non-hallucinogenic TWEETIO analogue of 2C-B with a 5-propoxy group, is under development by the Alexander Shulgin Research Institute for use as a mild stimulant-like medication for the treatment of psychiatric disorders. Another known TWEETIO-related drug, a 2C-E analogue with a 5-isopropoxy group, is 2CE-5-iPrO.

Related compounds

DOx compounds Various DOx compounds featured extended methoxy groups at the 2, 4, and/or 5 positions. These include the DOM derivatives Florence (DOM-2-EtO), Iris (DOM-5-EtO), and DOM-2,5-DiEtO and the TMA-2 (DOMeO) derivatives EMM (TMA2-2-EtO), MEM (TMA2-4-EtO), MME (TMA2-5-EtO), EEM (TMA2-2,4-DiEtO), EME (TMA2-2,5-DiEtO), MEE (TMA2-4,5-DiEtO), EEE (TMA2-2,4,5-TriEtO), and MPM (TMA2-4-PrO), among others.

Scalines Various scalines, or mescaline analogues, featured extended methoxy groups. These include asymbescaline, escaline, metaescaline, metaproscaline, proscaline, symbescaline, and trisescaline (trescaline), among others.

MDxx compounds EMDA-2 (2-ethoxy-4,5-methylenedioxyamphetamine) has been described by Alexander Shulgin as the "TWEETIO" analogue of MMDA-2. It is active as a psychedelic, producing closed-eye visuals and other effects, with a potency of about one-third that of MMDA-2 and a duration of 10 to 12 hours.

See also 2C (psychedelics) Substituted methoxyphenethylamine

References

External links PiHKAL TWEETIO Instances and Excerpts

Worked examples

Example 1 — a first encounter with TWEETIO

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

In research: TWEETIO 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 TWEETIO 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: TWEETIO is common in secondary-school and first-year university syllabi. It links to neighbouring topics Alexander Shulgin, Chemical classes of psychoactive drugs, TWEETIO (psychedelics), so understanding it makes those chapters shorter.
In everyday life: Look for TWEETIO 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 TWEETIO in 20 minutes

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

Frequently asked questions

What is TWEETIO in simple terms?

Why does TWEETIO 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 TWEETIO?

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 TWEETIO.