Identify 1 and 2 in the following reaction:
Identify 1 and 2 in the following reaction:
CH3MgBr and CH3CHO
CH4 and CH3CHO
The Correct Option is C
Solution and Explanation
Reaction Steps:
Formation of Grignard Reagent (Compound 1): The reaction of methyl bromide (CH3Br) with magnesium (Mg) in dry ether forms a Grignard reagent. A Grignard reagent has the general formula R-MgX, where R is an alkyl or aryl group and X is a halogen. In this case, R is methyl (CH3) and X is bromine (Br). So compound 1 is methylmagnesium bromide (CH3MgBr).
Grignard Reaction with a Ketone followed by Acid Workup (Compound 2): The Grignard reagent (CH3MgBr) acts as a strong nucleophile and attacks the carbonyl carbon of the ketone. This forms a new C-C bond. The subsequent acid workup (H3O+) protonates the alkoxide intermediate, resulting in an alcohol.
The ketone structure present will have two methyl groups on one side of the carbonyl, so it will become a 2 degree alcohol after being reacted with the Grignard and then protonated.
Therefore, the correct answer is (C) CH3MgBr and 
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For the reaction:
\[ 2A + B \rightarrow 2C + D \]
The following kinetic data were obtained for three different experiments performed at the same temperature:
\[ \begin{array}{|c|c|c|c|} \hline \text{Experiment} & [A]_0 \, (\text{M}) & [B]_0 \, (\text{M}) & \text{Initial rate} \, (\text{M/s}) \\ \hline I & 0.10 & 0.10 & 0.10 \\ II & 0.20 & 0.10 & 0.40 \\ III & 0.20 & 0.20 & 0.40 \\ \hline \end{array} \]
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Concepts Used:
Haloalkanes and Haloarenes - Chemical Reactions
Chemical Reactions go with the breaking and bonding of covalent bonds which involve of exchange of electrons. The functional groups of Organic compounds play a consequential role in the process. Based on the above theory, reactions can be classified into five main groups:
Rearrangement Reactions are the type of reactions in which products get formed simply by the rearrangement of atoms and electrons in the reactant molecules.
O
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NH4CNO → NH2 –C – NH2
Substitution Reactions are the reactions in which an atom or group of atoms is replaced by some other atom or group of atoms without any change in the structure of the remaining part of the molecule.
CH3Br + KOH (aqueous) → CH3OH + KBr
Addition Reactions are the reactions in which products get formed by the addition of some reagent to an unsaturated compound.
CH2 = CH2 + HCl → CH5Cl
- Electrophilic Addition Reactions
- Nucleophilic Addition Reactions
- Free Radical Addition Reactions
Elimination Reactions are the reactions in which the products get formed by the loss of simple molecules like HX from the reactant molecules.
C2H5OH → C2H4
- EN1 (Nucleophilic Elimination Unimolecular)
- EN2 (Nucleophilic Elimination Bimolecular)
A polymerization Reaction is the union of two or more molecules of a substance that form a single molecule with higher molecular weight.
n (CH = CH2) → (-CH2 – CH2 -) n