Give the structure,formula and names of $2$ to $4$ carbon alkynes.
(N/A) The structures,formulas,and names of alkynes with $2$ to $4$ carbon atoms are given in the table below:
| Number of Carbon Atoms | Formula | Structure | $IUPAC$ Name | Common Name |
|---|---|---|---|---|
| $2$ | $C_2H_2$ | $H-C \equiv C-H$ | Ethyne | Acetylene |
| $3$ | $C_3H_4$ | $CH_3-C \equiv CH$ | Propyne | Methylacetylene |
| $4$ | $C_4H_6$ | $(i) CH_3CH_2-C \equiv CH$ | But-$1$-yne | Ethylacetylene |
| $4$ | $C_4H_6$ | $(ii) CH_3-C \equiv C-CH_3$ | But-$2$-yne | Dimethylacetylene |
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Identify the structure of the final product $(D)$ in the following sequence of reactions:
$Ph-CO-CH_3$ $\xrightarrow{PCl_5, \Delta} A$ $\xrightarrow{3 \text{ eq. } NaNH_2/NH_3} B$ $\xrightarrow{\text{Acidify}} C$ $\xrightarrow{1. B_2H_6, 2. H_2O_2/OH^-} D$
Total number of $sp^2$ hybridised carbon atoms in product $D$ is:
$Ph-CO-CH_3$ $\xrightarrow{PCl_5, \Delta} A$ $\xrightarrow{3 \text{ eq. } NaNH_2/NH_3} B$ $\xrightarrow{\text{Acidify}} C$ $\xrightarrow{1. B_2H_6, 2. H_2O_2/OH^-} D$
Total number of $sp^2$ hybridised carbon atoms in product $D$ is:
The reagent used to convert an alkyne to an alkene is:
$CH_{3}-C \equiv CH$ $\xrightarrow{2 HBr}$ $\xrightarrow{H_{2}O} \text{Product}$. The product is:
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