Give structure of chain isomers which $m . f .$ is $C_{5} H_{12}$ . Also, give their IUPAC names.

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Solution

$C_{5} H_{12}$
By using the formula,
Formula= $2^{n - 4} + 1$
Pentane, n = 5
No. of isomers = $2^{5} - 4 + 1$
= $2^{1} + 1$
= 2 + 1
= 3

$C H_{3} - C H_{2} - C H_{2} - C H_{2} - C H_{3}$ (Pentane)
$1 C H_{3} - 2 C H_{3} | C H_{3} - 3 C H_{2} - 4 C H_{3}$ ( $2 -$ methyl butane)
$_{1} C H_{3} - C H_{3} |_{2} C | C H_{3} -_{3} C H_{3}$
$2, 2 -$ Dimethyl propane

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Give structure of chain isomers which m.f. is C5H12. Also, give their IUPAC names.

C5H12By using the formula,Formula= 2n−4+1Pentane, n = 5No. of isomers = 25−4+1 = 21+1 = 2 + 1 = 3 CH3−CH2−CH2−CH2−CH3 (Pentane)1CH3−2CH3|CH3−3CH2−4CH3 (2− methyl butane)1CH3−CH3|2C|CH3−3CH32,2− Dimethyl propane

Give structure of chain isomers which $m . f .$ is $C_{5} H_{12}$ . Also, give their IUPAC names.