Question:
What are C and E in the following reaction sequence?
What are C and E in the following reaction sequence?
Show Hint
Grignard reagents add to aldehydes forming secondary alcohols when reacted with benzaldehyde derivatives.
Updated On: Jun 15, 2026
- figA
- figB
- figC
- figD
Show Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Concept:
Alkene reactions proceed via electrophilic addition, Grignard reagent formation, and nucleophilic addition to carbonyl compounds.
Step 1: Formation of A and B. \[ C_3H_6 + HBr \rightarrow CH_3CHBrCH_3 \] \[ + Mg/dry\ ether \rightarrow CH_3CHMgBrCH_3 \]
Step 2: Formation of C. Grignard reagent reacts with benzaldehyde: \[ CH_3CHMgBrCH_3 + C_6H_5CHO \rightarrow secondary\ alcohol \] Thus C is phenyl substituted secondary alcohol.
Step 3: Formation of D and E. Direct addition with benzaldehyde gives alcohol D. Treatment with HCl converts alcohol to chloro derivative E.
Step 4: Final conclusion. C = phenyl substituted alcohol E = chloro derivative Hence correct option: \[ \boxed{C} \]
Step 1: Formation of A and B. \[ C_3H_6 + HBr \rightarrow CH_3CHBrCH_3 \] \[ + Mg/dry\ ether \rightarrow CH_3CHMgBrCH_3 \]
Step 2: Formation of C. Grignard reagent reacts with benzaldehyde: \[ CH_3CHMgBrCH_3 + C_6H_5CHO \rightarrow secondary\ alcohol \] Thus C is phenyl substituted secondary alcohol.
Step 3: Formation of D and E. Direct addition with benzaldehyde gives alcohol D. Treatment with HCl converts alcohol to chloro derivative E.
Step 4: Final conclusion. C = phenyl substituted alcohol E = chloro derivative Hence correct option: \[ \boxed{C} \]
Was this answer helpful?
0
0
Top TS EAMCET Chemistry Questions
- A, B and C are three biomolecules. The results of the tests performed on them are given below :A, B and C are respectively :
Molisch's lest Barfoed Test Biuret Test A Positive Negative Negativde B Positive Positive Negative C Negative Negative Positive - 1 mole of $H_2$ and 2 moles of $I_2$ are taken initially in a 2 litre vessel. The number of moles of $H_2$ at equilibrium is 0.2. Then the number of moles of $I_2$ and HI at equilibrium is
- The pH of a buffer containing equal molarconcentration of a weak base and its chloride ( $K_b$ for weak base = $2 \times 10^{-5}$, log 2 = 0.3) is
- Atomic radius (pm) of Al, Si, N and F respectively is
- Consider the following electrode process of a cell, $ {Cl^{-1} -> \frac{1}{2} Cl_2 + e^{-}}$ $ {[MCl + e^{-} -> M + Cl^{-} ] }$ If EMF of this cell is $-1.140\, V$ and $E^0$ value of the cell is $-0.55\,V$ at $298\,K$, the value of the equilibrium constant of the sparingly soluble salt MCl is in the order of
View More Questions
Top TS EAMCET Organic Compounds Containing Nitrogen Questions
- What is the product 'Z' in the following reaction sequence?
- The reagent which is used to distinguish primary, secondary and tertiary amines from the mixture is
- Identify the product 'Y' in the given sequence of reactions. (Chlorobenzene reacts with Conc. HNO$_3$ and Conc. H$_2$SO$_4$ to give X (Major). X then reacts with (i) NaOH, 443 K and (ii) H$^+$ to give Y.)
- The correct statements about the products B and C in the given reactions are (Ethanol reacts with HCl/Anhy ZnCl$_2$ to give A. A reacts with ethanolic AgCN to give B (Minor) and C (Major)). I. B and C are functional isomers II. With H$_2$|Catalyst B gives 1$^\circ$ amine and C gives 2$^\circ$ amine III. B on acid hydrolysis gives formic acid and C gives C$_3$H$_6$O$_2$ IV. C forms isocyanate with HgO
View More Questions
Top TS EAMCET Questions
- A bag contains $5$ red balls, $3$ black balls and $4$ white balls are drawn at random. The probability that they are not of same colour is
- If $cosec\, \theta - \cot \theta = 2017$, then quadrant in which $\theta $ lies is
- If $a$ is a unit vector, then $| a \times \hat{ i }|^{2}+| a \times \hat{ j }|^{2}+| a \times \hat{ k }|^{2}=$
- $A$ straight line makes an intercept on the $Y$-axis twice as long as that on $X$-axis and is at a unit distance from the origin. Then the line is represented by the equations
- Let $S$ and $S'$ be the foci of an ellipse and B be one end of its minor axis. If $SBS'$ is an isosceles right angled triangle then the eccentricity of the ellipse is
View More Questions