Can I Name These Haloalkenes Using the Preferred Numbering System?

[kelvin macks]

Homework Statement

for the substance on the left of first photo, can I name it as 3-bromo-5fluorohexane? for the substance on the right can I name it as 2-iodo-1methylcyclohexane?

Homework Equations

The Attempt at a Solution

 

[Borek]

can I name it as 3-bromo-5fluorohexane

No. You should choose numbers so that they are lowest possible.

I am not sure about the other one. I think numbering them 1, 2 is preferred over 2, 1 - it is the same rule as above, 1, 2 is considered the lower of two series.