Question

Briefly explain,Role of tellurium in organic synthesis​

Answer 1

Explanation:

Commonly used tellurium based reagents are hydrogen telluride, NaHTe, sodium telluride, and PhTeLi. Because Te is insoluble and polymeric, it is often not a useful precursor to organotellurium compounds, but it is attacked by hydride reducing agents:

Te + 2LiBHEt3 → Li2Te + H2 + 2 BEt3

and organolithium compounds:

Te + RLi → RTeLi

One departure from sulfur and selenium chemistry is the availability of the tetrachloride TeCl4.[2] Tellurium tetrachloride reacts with alkenes and alkynes to the chloro tellurium trichloride addition product:

RCH=CH2 + TeCl4 → RCH(Cl)-CH2TeCl3

These organotellurium derivatives are susceptible to further reactions.

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Answer 2

Answer:

hey mate here is your answer:

Explanation:

Tellurium improves the machinability of copper and stainless steel, and its addition to lead decreases the corrosive action of sulfuric acid on lead and improves its strength and hardness. Tellurium is used as a basic ingredient in blasting caps, and is added to cast iron for chill control.

The increasing number of publications that use tellurium clearly demonstrates the important role of tellurium compounds as unique and powerful tools in a broad range of organic chemical manipulations, often characterized by their selective behavior.

Tellurium in Organic Synthesis provides an overview of the principal aspects of organic tellurium chemistry. Many chapters have been enriched and updated in this second edition. New chapters include overviews of toxicology and pharmacology and a review on the preparation and reactivity of several tellurium heterocycles.

The first part of the book focuses on the preparation of selected inorganic tellurium compounds and on the main classes of organotellurium compounds. The second part, and main interest of the book, details the use of these inorganic and organic compounds as reagents to perform specific organic manipulations and synthesis. Reactions covered include reduction, formation and reaction of anionic species, deprotection, tellurium cyclizations, formation of alkenes, use of vinylic tellurides, free radical chemistry, transmetallations, and removal of tellurium.  

Key Features

• Overview of inorganic and organic tellurium chemistry

• Synthetic applications of tellurium compounds

• All topics accompanied by detailed experimental procedures

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