Chapter 4: Q.4-27 (page 114)

Draw the five cycloalkanes with the formula $C_{5} H_{10}$ .

Short Answer

Expert verified

The five cycloalkanes with chemical formula $C_{5} H_{10}$ :

Cyclopentane
Methylcyclobutane
Ethylcyclopropane
$1, 1 - \dim e t h y l c y c l o p r o p a n e$
$c i s - 1, 2 - \dim e t h y l c y c l o p r o p a n e$

Step by step solution

Cis and Trans configuration

Cis configuration is when two groups are on the same face of the ring and trans configuration is when the groups are on opposite faces.Both isomers are stable and neither can be converted into the other without breaking and reforming chemical bonds.

Rules for the naming of compound

Find the parent

Count the number of carbon atoms in the ring and the number in the largest substituent whichever has the highest carbon atom will be considered as the parent. If the number of carbon atoms in the ring is equal to the number in the substituent in that case ring is taken as the parent.

Number the substituents, and write the name.

For an alkyl- or halo-substituted cycloalkane, choose a point of attachment as carbon 1 and number the substituents on the ring so that the secondsubstituent has as low a number as possible. Same procedure for third or fourth substituent so has the low number as much as possible, until a point of difference is found.

When two or more different alkyl groups are present that could potentially take the same numbers, number them by alphabetical priority, ignoring numerical prefixes such as di- and tri-.