Home
Class 12
CHEMISTRY
PhMgBr+underset((2)H^(o+))overset((1)X)r...

`PhMgBr+underset((2)H^(o+))overset((1)X)rarrPh-underset(Ph)underset(|)overset(OH)overset(|)C-Ph`
X is

A

`Ph-overset(O)overset(||)C-H`

B

`Ph-overset(O)overset(||)C-Ph`

C

`Ph-underset(Ph)underset(|)(CH)-overset(O)overset(||)C-H`

D

`Ph-overset(O)overset(||)C-CH_3`

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to determine the reagent \( X \) that reacts with the Grignard reagent \( \text{PhMgBr} \) and a proton source \( \text{H}^+ \) to yield the product \( \text{Ph-}\overset{|}{\text{C}}\text{-OH-Ph} \). ### Step-by-Step Solution: 1. **Identify the Grignard Reagent**: The Grignard reagent given is \( \text{PhMgBr} \), which is a phenyl magnesium bromide. This compound acts as a strong nucleophile. **Hint**: Remember that Grignard reagents react with electrophiles. 2. **Analyze the Product**: The product is \( \text{Ph-}\overset{|}{\text{C}}\text{-OH-Ph} \). This indicates that we have a carbon atom bonded to two phenyl groups and a hydroxyl group. **Hint**: Look for a carbonyl compound that can provide the necessary carbon and can be attacked by the Grignard reagent. 3. **Consider Possible Electrophiles**: The electrophile \( X \) must be a carbonyl compound that can react with \( \text{PhMgBr} \). The carbonyl group will be attacked by the nucleophilic phenyl group. 4. **Evaluate the Options**: - **Option A**: \( \text{PhCHO} \) (benzaldehyde) - Reaction: \( \text{PhMgBr} + \text{PhCHO} \) leads to \( \text{Ph-}\overset{|}{\text{C}}\text{-O-MgBr} \) followed by hydrolysis gives \( \text{Ph-}\overset{|}{\text{C}}\text{-OH-Ph} \) (Incorrect, as it gives only two phenyls). - **Option B**: \( \text{PhC(=O)Ph} \) (benzophenone) - Reaction: \( \text{PhMgBr} + \text{PhC(=O)Ph} \) leads to \( \text{Ph-}\overset{|}{\text{C}}\text{-O-MgBr} \) followed by hydrolysis gives \( \text{Ph-}\overset{|}{\text{C}}\text{-OH-Ph} \) (Correct, gives three phenyls). - **Option C**: \( \text{PhCH=O} \) (formaldehyde) - Reaction: Would yield only two phenyls (Incorrect). - **Option D**: \( \text{PhC(=O)CH_3} \) (acetophenone) - Reaction: Would yield \( \text{Ph-}\overset{|}{\text{C}}\text{-OH-CH3} \) (Incorrect). 5. **Conclusion**: The only option that yields the correct product with three phenyl groups is **Option B**: \( \text{PhC(=O)Ph} \) (benzophenone). ### Final Answer: **X is \( \text{PhC(=O)Ph} \) (benzophenone).**
Promotional Banner

Similar Questions

Explore conceptually related problems

The conversation : CH_(3)-underset(OH)underset(|)overset(CH_(3))overset(|)(C)-underset(OH)underset(|)overset(CH_(3))overset(|)(C)-CH_(3)underset(H_(2)SO_(4))overset("dil")rarrCH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-underset(O)underset(||)(C)-CH_(3) is called :

Give the IUPAC name of the compounds numbered i] to v]. (i) H-underset(H)underset(|)overset(H)overset(|)(C)-underset(CH_3)underset(|)overset(H)overset(|)(C)-underset(H)underset(|)overset(H)overset(|)(C)-underset(H)underset(|)overset(H)overset(|)(C)-OH " " (ii) H-underset(H)underset(|)overset(H)overset(|)(C)-underset(CH_3)underset(|)overset(CH_3)overset(|)(C)-underset(H)underset(|)overset(H)overset(|)(C)-OH (iii) H-underset(H)underset(|)overset(H)overset(|)(C)-underset(H)underset(|)overset(Br)overset(|)(C)-underset(CH_3)underset(|)(CH)-overset(O)overset(||)(C)-OH " " (iv) H-underset(H)underset(|)overset(H)overset(|)(C)-underset(CH_3)underset(|)overset(H)overset(|)(C)-underset(H)underset(|)overset(H)overset(|)(C)-overset(H)overset(|)(C)=O (v) H-underset(H)underset(|)overset(H)overset(|)(C)-underset(CH_3)underset(|)overset(H)overset(|)(C)-overset(O)overset(||)(C)-underset(H)underset(|)overset(H)overset(|)(C)-H

Give the IUPAC names of the compounds numbered (i) to (v) (i) underset([CH_3-C-=CH])(H-underset(H)underset(|)overset(H)overset(|)(C)-C=C-H) " " (ii)H-underset(H)underset(|)overset(H)overset(|)(C)-underset(H)underset(|)overset(H)overset(|)(C)-underset(overset(O)H)underset(|)overset(H)overset(|)(C)-underset(H)underset(|)overset(H)overset(|)(C)-underset(H)underset(|)overset(H)overset(|)(C)-H (iii) H-underset(H)underset(|)overset(H)overset(|)(C)-underset(overset(H-underset(|)(C)-H)H)underset(|)overset(H)overset(|)(C)-underset(H)underset(|)overset(H)overset(|)(C)-H " " (iv) H-underset(H)underset(|)overset(H)overset(|)(H)-underset(OH)underset(|)overset(O)overset(||)(C) " " (v) H-underset(Cl)underset(|)overset(H)overset(|)(C)-underset(Cl)underset(|)overset(H)overset(|)(C)-H

Ph-underset(OH)underset(|)overset(Ph)overset(|)(C)-underset(OH)underset(|)overset(H)overset(|)(C)-overset(HTheta)(rarr)underset("Major")(X) identify X.

Identify and name the functional groups present in the following compounds. (a) H-underset(H)underset(|)overset(H)overset(|)C-underset(H)underset(|)overset(H)overset(|)C-underset(H)underset(|)overset(H)overset(|)C-OH , (b) H-underset(H)underset(|)overset(H)overset(|)C-underset(H)underset(|)overset(H)overset(|)C-overset(O)overset(||)C-OH (c ) H-underset(H)underset(|)overset(H)overset(|)C-underset(H)underset(|)overset(H)overset(|)C-overset(O)overset(||)C-underset(H)underset(|)overset(H)overset(|)C-underset(H)underset(|)overset(H)overset(|)C-H , (d) H-underset(H)underset(|)overset(H)overset(|)C-underset(H)underset(|)overset(H)overset(|)C-overset(H)overset(|)C=overset(H)overset(|)C-H

Ph-underset(Me)underset(|)overset(OH)overset(|)(C)-underset(I)underset(|)overset(Me)overset(|)(C)-Phunderset(Delta)overset(AgNO_(3))rarr? Major product is

CH_(3)CH_(2)-underset(Ph)underset(|)overset(OH)overset(|)C-CH_(3) cannnot be prepared by:

Give IUPAC names of: [i] H-underset(H)underset(|)(C)=O" " [ii] H-underset(H)underset(|)overset(H)overset(|)(C)-underset(H)underset(|)overset(H)overset(|)(C)-underset(H)underset(|)overset(H)overset(|)(C)-OH" " [c] H_3C-overset(H)overset(|)(C)=overset(H)overset(|)(C)-CH_3

Carbonyl compound (p) underset((2). H_(2)O)overset((1). "grignard reagent")toPh-CH_(2)-underset(OH)underset(|)overset(H)overset(|)C-CH_(3) Carbonyl compound can be: