Isomer Question

[Short Round]

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Just a quick Q ... I'm looking for the number of constitutional isomers for C3H6Cl2...

I keep getting 5, but from what I'm seeing on google, there should be four?

Are the following two things the same?
H H H
Cl-C-C-C-Cl
H H H

and

H H H
H-C-C-C-H
Cl H Cl

I have them counting as two different isomers, maybe that's why I get that extra one?

Thanks

 

[161927]

C3H6CL2

1. vicinal Cl
2. Cl at terminal Cs
3. Geminal Cl (1 position)
4. Geminal Cl (2 position)

just four

 

[avuong]

correct.

Cl attached to the two end carbons are both the same. Single bonds can freely rotate so they are the same.