Question

question 10 (1 point)
alkyl halides are hydrocarbons that contain at least one halogen atom.
what is the name of this alkyl?
a) 1,5-dichloro-2-methylcyclohexane
b) 2,5-dichloro-1-methylcyclohexane
c) 4,6-dichloro-1-methylcylclohexane
d) 1,4-dichloro-5-methylcyclohexane
e) 1,3-dichloro-4-methylcyclohexane

Explanation:

When naming alkyl halides (in this case, a cycloalkane derivative), we number the ring to give the substituents (chlorine atoms and methyl group) the lowest possible numbers. Starting from the carbon with one of the chlorine atoms and numbering in a way that the substituents get the lowest - numbered positions.
For the given structure, if we start numbering from the carbon with one chlorine atom and go around the ring, we find that the positions of the substituents are best described as 1,5 - dichloro (for the two chlorine atoms) and 2 - methyl (for the methyl group).

Answer:

A. 1,5 - dichloro - 2 - methylcyclohexane