A student was carrying out a Grignard reaction between PhMgBr and ethyl benzoate. She ran out of anhydrous ether just after the Grignard reagent was made. Which of the following solvents can still be used to dissolve the ethyl benzoate for its reaction with already formed PhMgBr ?
A
acetone
B
ethyl acetone
C
absolute alcohol
D
benzene
Text Solution
Verified by Experts
The correct Answer is:
D
Benzene will not react with Grignard reagent.
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Grignard reagent is usually prepared by R-X+Mg overset(Et_(2)O)rarrRMgX " " "Grignard reagent" Ar-X+Mg overset(Et_(2)O)rarrArMgX " " "Grignard reagent" Grignard reagent acts s a strong base. Grignard reagent carry out nucleoplilic attack in absence of acidic hydrogen. Grignard reagent form complex with its ether solvent. Complex formation with molecule of ether is an important factor in the formation and stability of Grignard reagent. Which of the following will undergo acid-base reaction with Grignard reagent ?
Grignard reagent is usually prepared by R-X+Mg overset(Et_(2)O)rarrRMgX " " "Grignard reagent" Ar-X+Mg overset(Et_(2)O)rarrArMgX " " "Grignard reagent" Grignard reagent acts s a strong base. Grignard reagent carry out nucleoplilic attack in absence of acidic hydrogen. Grignard reagent form complex with its ether solvent. Complex formation with molecule of ether is an important factor in the formation and stability of Grignard reagent. Which of the following reactants give primary alcohol as a major product when reacts with RMgX followed by acidification?
Grignard reagents are singma - bonded organometallic compound. There exists covalent bond between carbon and magnesium atoms. Grignard reagent finds applications in the sysnthesis of variety of compounds. Gringnard reagent reacts as carbanion and the reaction of carbanion with the proton of an acid is acid- base reaction. Cabonyl compound (including ester) on interation with grignard reagent generates alkoxide ion and thus can be converted into alcohols. Grignard reagent react with almost all functional groups. Notable exceptions are tertiary amines aliphatic and aromatic C=C bonds. Q. Which of the following compounds gives benzene as a major product on reaction with PhMgBr (1eq)
R-X+Mgoverset(Ether,Delta)rarroverset(delta-)R-overset(delta+)Mg-X Grignard reagents may be prepared from 1^(@) , 2^(@)" and "3^(@) halides as well as from vinayl and aryl halide. Vicinal dihalide and those halide which contain acidic tail do not form Grignard reagent. Which of the following compounds can form Grignard reagent on reaction with Mg//Ether?
MS CHOUHAN-GRIGNARD REAGENTS-Level 1 (Q.61 To Q.66)
