Chapter 12.5, Problem 12.32QAP

Interpretation Introduction

Interpretation:

An organic compound can have many structures by which they can be represented, such as molecular formula, Lewis structure, structural formula and condensed formula.

Concept introduction:

• A condensed structural formula is a more compact way of drawing the structural formula of a molecule which is also called as a semi-structural formula.
• In a condensed structural formula covalent bonds are not shown and atoms of the same type bonded to one another are grouped together in a line.
• If there is repetition of a group in a chain, then brackets [square brackets] are used to indicate the repetition of a group in a chain.
  A subscript number written to the right of the final bracket tells us how many times this group of atoms is found in this position in the molecule.
• If groups of atoms are attached to a chain, then parentheses (round brackets) are used to enclose groups attached to a chain
• Double and/or triple covalent bonds between carbon atoms are shown in the condensed structural formula.
• Whereas structural formula shows all bonding.

Interpretation Introduction

To determine:

To write the condensed formula for the given alkanes

a. 3-methyl-1-butyne

b. 3,4-dimethyl-1-pentene

To write structural formula for the given alkanes

c. 1,2-dichlorocyclopentene

d. 2-methyl-2-hexene