What is the condensed formula notation for 1,4-dibromo-2-methylpentane

What is the condensed formula notation for 1,4-dibromo-2-methylpentane? Select the correct answer below: Br-CH
-CH
-C(Br)(CH
)-CH
CH
-CH
-CH(Br)-CH(Br)-CH(CH
)-CH
Br-CH
-CH(CH
)-CH
-CH(Br)-CH
CH
-CH(Br)-CH
-CH(CH
)-CH
-CH
-Br

The Correct Answer and Explanation is:

The correct condensed formula notation for 1,4-dibromo-2-methylpentane is:

BrCH₂CH(CH₃)CH₂CHBrCH₃

Explanation

To understand the correct condensed formula for 1,4-dibromo-2-methylpentane, we first need to break down the IUPAC name:

1. Pentane: This indicates the parent chain has five carbon atoms in a continuous straight chain.
2. 2-methyl: A methyl group (–CH₃) is attached to the second carbon of the main pentane chain.
3. 1,4-dibromo: This means two bromine atoms (Br) are attached to the first and fourth carbon atoms of the main chain.

Now, we construct the backbone step-by-step:

• Carbon 1 (C1): This carbon has a Br atom and two hydrogen atoms, so it is written as BrCH₂–
• Carbon 2 (C2): This carbon is bonded to a CH₃ group (methyl) and to two other carbons (C1 and C3). It is written as CH(CH₃)–
• Carbon 3 (C3): This is a regular CH₂ group, written as CH₂–
• Carbon 4 (C4): This has a Br atom and is bonded to C3 and C5. It is written as CHBr–
• Carbon 5 (C5): This is a CH₃ group at the end, written as CH₃

Now putting all parts together:

BrCH₂–CH(CH₃)–CH₂–CHBr–CH₃

This is the correct condensed structural formula. It maintains the correct carbon chain length, shows the location of both bromine atoms, and includes the methyl group on the second carbon.

Other options may be scrambled or may place the bromine or methyl group in the wrong position, or result in too many or too few carbon atoms. Always check the carbon count, the branch locations, and the substituent positions against the IUPAC name.