Which of the following on reaction with Grignard reagents produce alkane?

We know that Grignard reagent produces alkane if react with (1)phenol because, as per hint phenol give it’s H+ easily then other respective group mentioned as well as carboxylic group is a strong acid where Grignard’s reagent is a strong base therefore, they form salt and water when react also (3)amine can produce …

Why are aprotic solvents better for Grignard reactions?

Grignard formation does not involve a radical chain mechanism. q Diethyl ether is an especially good solvent for the formation of Grignard reagents because ethers are non-acidic (aprotic). Water or alcohols would protonate and thus destroy the Grignard reagent, because the Grignard carbon is highly nucleophilic.

Which of the following alkyl halides Cannot be used to make a Grignard reagent?

Class 12 Question. Halides contain ing acidic hydrogen (here — OH) cannot be used in Grignard’s synthesis as Grignard reagent consist of very basic carbanion (R-).

How do you make an alkane from a Grignard reagent?

Grignard reagents react rapidly with acidic hydrogen atoms in molecules such as alcohols and water. When a Grignard reagent reacts with water, a proton replaces the halogen, and the product is an alkane.

Why Grignard reagent is prepared in anhydrous condition?

Grignard reagent should be prepared under anhydrous conditions, because it is very reactive. It reacts very quickly with any source of proton to give hydrocarbon. It reacts with water very quickly. Therefore, it is necessary to avoid moisture from the Grignard reagents.

Are Grignard reagents strong nucleophiles?

Grignard reagents are formed by the reaction of magnesium metal with alkyl or alkenyl halides. They’re extremely good nucleophiles, reacting with electrophiles such as carbonyl compounds (aldehydes, ketones, esters, carbon dioxide, etc) and epoxides.

Why are alkanes not suitable for Grignard reagent reaction?

Alkanes are not good for health. So grignard + water reaction will give toxic gases. Also, alkanes such as methane, ethane are extremely flammable gases. Is mechanism of grignard reaction with water different from grignard reagent reaction with ethanal.

Why Grignard reagent should be prepared in a dry medium?

Grignard reagent is highly unstable in water and form an alkane compound after hydrolysis. This is the reason why grignard reagent should be prepared in a dry medium (without water or moisture). Grignard reagent + water → alkane + MgX (OH) Alkane is given such as protecting number of carbon atoms contains in the grignard reagent.

What is the mechanism of Grignard reaction with water?

So grignard + water reaction will give toxic gases. Also, alkanes such as methane, ethane are extremely flammable gases. Is mechanism of grignard reaction with water different from grignard reagent reaction with ethanal. In both reactions, alkyl group of grignard reagent starts the reaction by attacking positively charged part.

How do you represent Grignard reagent as RMgBr?

You can represent grignad reagent as RMgBr. R represents the alkyl group which is capable of behavinh as a strong nucleophile. Water is represent as H 2 O. RH represent the alkane which is given as a product in this reaction. Will grignard with water reaction give a toxic or flammable gas?