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प्रश्न
How is the following conversion effected phenyl methanal into benzoin?
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उत्तर
\[\begin{array}{cc}
\ce{\underset{Phenyl methanal}{C6H5CHO + } C6H5CHO ->[alc][KCN] C6H5 - CH - C - C6H5}\\
\phantom{.........................................}|\phantom{....}||\phantom{}\\
\phantom{.......................................}\ce{\underset{(Benzoin)}{OH}}\phantom{}\ce{O}\phantom{}
\end{array}\]
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संबंधित प्रश्न
Answer in brief.
Observe the following equation of reaction of Tollens' reagent with aldehyde. How do we know that a redox reaction has taken place? Explain.
\[\ce{R-CHO + 2Ag(NH_{3})^{+}_{2} + OH^{-}->[\triangle] R-CO{O}^{-} + 2Ag↓ + 4NH3 + 2H2O}\]
\[\begin{array}{cc} \phantom{...}\ce{R}\phantom{.................}\ce{R}\phantom{..}\ce{H}\phantom{................}\\ \phantom{...}\backslash\phantom{..................}\backslash/\phantom{..........}\phantom{.......}\\ \ce{C = O ->[H2NNH2][KOH/glycol] C + N2 + H2O}\\ \phantom{}/\phantom{............}\phantom{.......}/\phantom{}\backslash\phantom{...............}\\ \phantom{}\ce{R}\phantom{..................}\ce{R}\phantom{..}\ce{H}\phantom{...............} \end{array}\]
Reaction is called ____________.
Which of the following does not give yellow solid on treatment with sodium hypoiodlte?
The first oxidation product of secondary alcohols is ____________.
Which of the following carbonyl compounds does NOT undergo aldol condensation?
Complete the following reaction.
\[\begin{array}{cc}
\ce{CH3 - CH2 - CH2 - C - CH3 ->[HO - CH2 - CH2 - CH2 - OH][dry HCl] ?}\\
||\phantom{.........}\\
\ce{O}\phantom{.........}
\end{array}\]
How propanal is converted into propane.
A carbonyl compound A having molecular formula C5H10O forms crystalline precipitate with sodium bisulphate and gives positive iodoform test. A does not reduce Fehling solution. Identify A.
How are the following compound obtained from alkyne?
Acetone
Nitration of the compound is carried out; this compound gives a red-orange ppt. with 2,4-DNP, this compound undergoes the Cannizzaro reaction but not aldol, then possible product due to nitration is:
