Considering the elimination reactions, followed by the deprotonation of water, evaluate the following statements. i- Three equivalents of the base are needed to obtain the terminal alkyne. ii- The alkyl dialect is geminal. iii- The speed of obtaining the alkynes depends only on the concentration of the base. iv- Obtaining alkyne from alkyl dialects is accompanied by two successive elimination reactions. In the first elimination reaction it is possible to use NaOH. However, in the second, it requires a very strong base, such as liquid ammonia. It is correct to say that: i and ii, just  i and iii, just  i and iv, just  i, ii and iv, only all except i. nah

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Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Considering the elimination reactions, followed by the deprotonation of water, evaluate the following statements.
i- Three equivalents of the base are needed to obtain the terminal alkyne.
ii- The alkyl dialect is geminal.
iii- The speed of obtaining the alkynes depends only on the concentration of the base.
iv- Obtaining alkyne from alkyl dialects is accompanied by two successive elimination reactions. In the first elimination reaction it is possible to use NaOH. However, in the second, it requires a very strong base, such as liquid ammonia.

It is correct to say that:

i and ii, just

 i and iii, just

 i and iv, just

 i, ii and iv, only all except i.

nah

H Br
2 NaNH2.
NH,
NaNH2
NH,
R-CEC Na
R-C-C-H
R-CEC-H
H Br
Íon alqulneto
R-CEC: Na
O e..
- R-CEC-H + Na :OH
Ácido mals forte
(pK = 15,7)
Ácldo mals fraco
(pKg = 25)
Base mals forte
Base mals fraca
O equlilibrlo favorece a formação do
ácldo mals fraco e da base mals fraca
Transcribed Image Text:H Br 2 NaNH2. NH, NaNH2 NH, R-CEC Na R-C-C-H R-CEC-H H Br Íon alqulneto R-CEC: Na O e.. - R-CEC-H + Na :OH Ácido mals forte (pK = 15,7) Ácldo mals fraco (pKg = 25) Base mals forte Base mals fraca O equlilibrlo favorece a formação do ácldo mals fraco e da base mals fraca
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