Draw the curved arrow mechanism for the addition of HCN in water with NaOH to heptan-4-one to give the corresponding cyanohydrin
in the fewest steps. Draw the arrows that lead to the resonance structures with full octets around each atom other than hydrogen. Draw all electrons and charges if necessary on all structures; do not show any inorganic side products or counterions. Reagents needed for each step are provided in the boxes.
1 answer:
Answer:
Cyanohydrin is formed through nucleophilic addition of cyanide ion to carbonyl center of the given ketone
Explanation:
- NaOH maintains basic medium. Hence dissociation of HCN gets favored to produce nucleophile
- In first step,
is produced through dissociation of HCN.
- In second step,
- In the third step, protonation of negatively charged oxygen atom occurs leading to formation of cyanohydrin.
- Full reaction mechanism has been shown below.
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Answer:
A, C and D are correct.
Explanation:
Hello.
In this case, since the relationship between the vapor pressure of a solution is directly proportional to the mole fraction of the solvent and the vapor pressure of the pure solvent as stated by the Raoult's law:
Since the solute is not volatile, the mole fraction of the solute is not taken into account for vapor pressure of the solution, therefore A is correct whereas B is incorrect.
Moreover, since the higher the vapor pressure, the weaker the intermolecular forces due to the fact that less more molecules are like to change from liquid to vapor and therefore more energy is required for such change, we can evidence that both C and D are correct.
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