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प्रश्न
Write a short note on hydroboration.
उत्तर
Diborane adds on to alkenes and alkynes in ether solvent at room temperature. This reaction is called hydroboration and is highly used in synthetic organic chemistry especially for anti-Markovnikov addition.
\[\ce{B2H6 + 6RCH = CHR -> 2(RCH2 - CHR3)B}\]
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संबंधित प्रश्न
An aqueous solution of borax is ____________.
Which among the following is not a borane?
Which of the following metals has the largest abundance in the earth’s crust?
Match items in Column – I with the items of Column – II and assign the correct code.
| Column – I | Column – II |
| A. Borazole | 1. B(OH)3 |
| B. Boric acid | 2. B3N3H6 |
| C. Quartz | 3. Na2[B4O5(OH)4]8H2O |
| D. Borax | 4. SiO2 |
Duralumin is an alloy of ____________.
Describe the structure of diborane.
Complete the following reaction.
\[\ce{B(OH)3 + NH3 ->}\]
Complete the following reaction.
\[\ce{B2H6 +CH3OH ->}\]
Complete the following reaction.
\[\ce{B + NaOH ->}\]
A double salt which contains fourth-period alkali metal (A) on heating at 500 K gives (B). aqueous solution of (B) gives white precipitate with BaCl2 and gives a red colour compound with alizarin. Identify A and B.
