Question

ch₃ch₂ch₂ch₂ch(ch₃)br
o 1°
o 2°
o 3°
part 2 of 3
br
o 1°
o 2°
o 3°
part 3 of 3
h₃c ch₃ h
h₃c - c - c - c - i
h₃c h h
o 1°
o 2°
o 3°

Explanation:

Step1: Recall definition of 1°, 2°, 3° halides

1° halide: halogen - bonded carbon is attached to 1 other carbon. 2° halide: halogen - bonded carbon is attached to 2 other carbons. 3° halide: halogen - bonded carbon is attached to 3 other carbons.

Step2: Analyze Part 1

In $CH_3CH_2CH_2CH_2CH(CH_3)Br$, the carbon - bromine bonded carbon is attached to 2 other carbons, so it is a 2° halide.

Step3: Analyze Part 2

In the given structure with a cyclopentane and a bromine - attached side - chain, the carbon bonded to bromine is attached to only 1 other carbon, so it is a 1° halide.

Step4: Analyze Part 3

In $H_3C - C(CH_3)_2 - CH(CH_3)-CH_2 - I$, the carbon - iodine bonded carbon is attached to 1 other carbon, so it is a 1° halide.

Answer:

Part 1: 2°
Part 2: 1°
Part 3: 1°