astronomy

T. V. Rajan Babu

T. V. Rajan Babu is a astronomy 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 T. V. Rajan Babu rather than just read about it. In short: T.V. (Babu) RajanBabu is an organic chemist who holds the position of distinguished professor of chemistry in the College of Arts and Sciences at the Ohio State University.

Key takeaways

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

Reference excerpt

T.V. (Babu) RajanBabu is an organic chemist who holds the position of distinguished professor of chemistry in the College of Arts and Sciences at the Ohio State University. His laboratory traditionally focuses on developing transition metal-catalyzed reactions. RajanBabu is known for helping develop the Nugent-RajanBabu reagent (Bis(cyclopentadienyl)titanium(III) chloride), a chemical reagent used in synthetic organic chemistry as a single electron reductant.

Education and professional experience RajanBabu received his BSc (special) from Kerala University in 1969 and M.Sc. degree from The Indian Institute of Technology (IIT, Madras) in 1971. He obtained his Ph.D. from The Ohio State University in 1979 working with Professor Harold Shechter, and was a postdoctoral fellow at Harvard University with Professor R. B. Woodward from 1978 to 1979. Notable work during his postdoctoral career includes the total synthesis of erythromycin. RajanBabu was a member of research staff and research fellow at DuPont Central Research from 1980 to 1994 until joining the Ohio State University faculty as a professor of chemistry in 1995.

Research Research in the RajanBabu lab is focused on development of new methodology for stereoselective synthesis. Major research areas include: Asymmetric Hydrovinylation

RajanBabu developed methodology surrounding C-C bond formation via metal-catalyzed hydroformylation. They reported several asymmetric examples through the usage of chiral phosphine ligand with a hemilabile coordinating group. This method was applicable using vinylarenes, 1,3-dienes and strained olefins as substrates. Applications of this chemistry include a new synthesis of (S)-ibuprofen and a new approach to controlling the exocyclic side-chain stereochemistry in helioporin D and pseudopterocins. Related to this methodology, RajanBabu also developed a tandem [2+2] cycloaddition/asymmetric hydrovinylation reaction to allow conversion of simple precursors (ethylene, enynes) to structurally complex cyclobutanes.

Asymmetric Hydrocyanation

The RajanBabu group developed methodology in the area of hydrocyanation, leveraging the reaction of vinylarenes with HCN in the presence of Ni(0) complexes. Based on the phosphorus ligands within the Ni complex, the reaction can be rendered asymmetric. The enantioselectivity could be further improved by tuning the electronics of the phosphine ligands to electronically differentiate the phosphorus chelates. Electronic tuning was accomplished, for example, using widely available sugars such as D-glucose and D-fructose.

Radical Epoxide Opening For further information on the Nugent-RajanBabu reagent, please see Bis(cyclopentadienyl)titanium(III) chloride. Multicomponent Cyclization

One area of interest to the RajanBabu group is catalytic multicomponent addition/cyclization reactions. This methodology allows for formation of carbocyclic and heterocyclic compounds from acyclic precursors including unactivated olefins and acetylenes. This method leverages the reactivity of bifunctional reagents (X-Y) where X-Y in above scheme can represent R3Si−SiR‘3, R3Si−SnR‘3, R3Si−BR‘2, R3Sn−BR‘2, and trialkylsilicon- and trialkyltin- hydrides. The reactions are palladium-catalyzed, and incorporation of the X and Y species allows for vast diversification of the end products. Application of this methodology afforded syntheses of highly alkylated indolizidines such as IND-223A. Additional Methods RajanBabu has evaluated asymmetric aziridine openings with high enantioselectivity using yttrium- and lanthanide- salen complexes. The RajanBabu group has also developed water-soluble Rhodium(I) complexes, allowing for reactions to be run in aqueous media.

Publications RajanBabu has over 160 publications to date and has co-authored several reviews and patents. His H-index is 56.

Notable publications include:

Group-transfer polymerization. 1. A new concept for addition polymerization with organosilicon initiators Selective Generation of Free Radicals from Epoxides Using a Transition-Metal Radical. A Powerful New Tool for Organic Synthesis Transition-metal-centered radicals in organic synthesis. Titanium(III)-induced cyclization of epoxy olefins Ligand Electronic Effects in Asymmetric Catalysis: Enhanced Enantioselectivity in the Asymmetric Hydrocyanation of Vinylarenes Beyond Nature's Chiral Pool - Enantioselective Catalysis in Industry

Honors Arthur C. Cope Scholar Awards (2020) Chemical Research Society of India Medal (2013) Fellow of the American Association for the Advancement of Science (2012) Distinguished Alumnus, Indian Institute of Technology, Madras (2008)

References

External links Official website

Illustrations

Worked examples

Example 1 — a first encounter with T. V. Rajan Babu

Start with the simplest possible case. Write down what T. V. Rajan Babu claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, 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 T. V. Rajan Babu 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 T. V. Rajan Babu 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 T. V. Rajan Babu

In research: T. V. Rajan Babu appears in astronomy 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 T. V. Rajan Babu 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: T. V. Rajan Babu is common in secondary-school and first-year university syllabi. It links to neighbouring topics IIT Madras alumni, Living people, Ohio State University alumni, so understanding it makes those chapters shorter.
In everyday life: Look for T. V. Rajan Babu 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 T. V. Rajan Babu in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what T. V. Rajan Babu 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.
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Frequently asked questions

What is T. V. Rajan Babu in simple terms?

T.V. (Babu) RajanBabu is an organic chemist who holds the position of distinguished professor of chemistry in the College of Arts and Sciences at the Ohio State University.

Why does T. V. Rajan Babu matter?

Because it connects several astronomy 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 T. V. Rajan Babu?

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 T. V. Rajan Babu.