Provide the formula,structure,$IUPAC$ names,and common names of alkenes having carbon atoms $n = 1, 2, 3, 4$.
(N/A) The general formula for alkenes is $C_nH_{2n}$. Note that $n=1$ (methene) is a highly reactive intermediate (carbene) and not a stable alkene. The table below summarizes the requested information:
| No. of Carbon | Formula | Structure | $IUPAC$ (Common Name) |
|---|---|---|---|
| $C_1$ | $CH_2$ | $:CH_2$ | Methene (Methylene) |
| $C_2$ | $C_2H_4$ | $CH_2=CH_2$ | Ethene (Ethylene) |
| $C_3$ | $C_3H_6$ | $CH_3-CH=CH_2$ | Propene (Propylene) |
| $C_4$ | $C_4H_8$ | $(i)$ $CH_3CH_2CH=CH_2$ (ii) $CH_3CH=CHCH_3$ (iii) $CH_3-C(CH_3)=CH_2$ | $(i)$ But$-1-$ene ($\alpha$-butylene) (ii) But$-2-$ene ($\beta$-butylene) (iii) $2-$methylprop$-1-$ene (Isobutylene) |
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Given below are two statements:
Statement-$I$:
$trans$-But-$2$-ene upon treatment with $Br_2$ in $CCl_4$ gives the following product:
(Image provided)
Statement-$II$:
$cis$-But-$2$-ene upon treatment with alkaline $KMnO_4$ gives the following product:
(Image provided)
In the light of the above statements, choose the most appropriate answer from the options given below.
Statement-$I$:
$trans$-But-$2$-ene upon treatment with $Br_2$ in $CCl_4$ gives the following product:
(Image provided)
Statement-$II$:
$cis$-But-$2$-ene upon treatment with alkaline $KMnO_4$ gives the following product:
(Image provided)
In the light of the above statements, choose the most appropriate answer from the options given below.
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