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GenaCL600 [577]
3 years ago
6

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.

Chemistry
1 answer:
Troyanec [42]3 years ago
3 0

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 CN^{-}
  • In first step, CN^{-} is produced through dissociation of HCN.
  • In second step, CN^{-} gives nucleophilic addition at the cabonyl center of heptan-4-one,
  • 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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El fluoruro de hidrógeno HF que se utiliza en
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25.6g de HF son producidos

Explanation:

<em>...¿Cuánto HF es producido?</em>

Para resolver este problema debemos convertir la masa de cada reactivo a moles usando su masa molar. Como la reacción es 1:1, el reactivo con menor número de moles es el reactivo limitante. Con las moles del reactivo limitante podemos obtener las moles de HF y su masa así:

<em>Moles CaF2:</em>

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<em>Moles H2SO4:</em>

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98g/mol

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<em>Moles HF usando la reacción:</em>

0.641 moles CaF2 * (2mol HF / 1mol CaF2) = 1.282 moles HF

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<h3>25.6g de HF son producidos</h3>
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If a pharmacist dissolves 1.2 grams of a medicinal agent in 60 ml of a cough syrup having a specific gravity of 1.20, what is th
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Now if we have increased the volume by 0.2 so the new volume = 60.2

New mass = 72 + 1.2 = 73.2  

Specific gravity = mass /  volume = 73.2 / 60.2 = 1.22 g/mL

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