In reactions like the one shown below, a numbering scheme is used to show the or
ID: 1051360 • Letter: I
Question
In reactions like the one shown below, a numbering scheme is used to show the order that things are used in the reaction. The absence of these numbers implies everything is present in the reaction at the same time. Why is it important not to add LiAlH4 and H2O to a reaction at the same time?
Many organic compounds are not soluble in H2O.
H2O would be a competing nucleophile in the reaction.
LiAlH4 is insoluble in H2O.
The H atoms on LiAlH4 are very basic and will react with the acidic H atoms of H2O quickly creating H2 gas. This effectively kills the reagent before it can do any useful chemistry and could injure or kill the person doing the reaction under extreme circumstances.
1.Many organic compounds are not soluble in H2O.
2.H2O would be a competing nucleophile in the reaction.
3.LiAlH4 is insoluble in H2O.
4.The H atoms on LiAlH4 are very basic and will react with the acidic H atoms of H2O quickly creating H2 gas. This effectively kills the reagent before it can do any useful chemistry and could injure or kill the person doing the reaction under extreme circumstances.
Explanation / Answer
In LIAlH4,
H is having -1 charge which makes it vey basic
H- can then react with H+ from water to release H2 gas.
Answer:
4.
The H atoms on LiAlH4 are very basic and will react with the acidic H atoms of H2O quickly creating H2 gas. This effectively kills the reagent before it can do any useful chemistry and could injure or kill the person doing the reaction under extreme circumstances.
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