Why is this cis?

[Grace_Stevenson_1A]

Could someone please explain to me why this is cis? Thank you!!

[Chem_Mod]

The molecule is cis because the two molecules with the highest priority are on the same side

[Chem_Mod]

The molecule is cis because the two molecules with the highest priority are on the same side

Cis/trans system uses the longest carbon chain.

[Julia Nakamura 2D]

How can you tell that the two highest priority molecules are on the same side?

[Grace_Stevenson_1A]

Thank you but I'm
Still confused which moleculares are the highest priority? Versuses what other molecules are lowest priority?

[Carolyn Huh 1K]

Priority increases as atomic number increases.

[Grace_Stevenson_1A]

I understand that but what I'm confused with is what molecules we are suppose to be analyzing here for their atomic number. Thank you

[Chem_Mod]

Priority increases as atomic number increases.

No, this is completely untrue. Cis/trans is completely different from E/Z. ONLY E/Z uses the atomic numbering system. For cis/trans, it either uses identical substituents or longest carbon chain. Just use E/Z for double bonds b/c there is too much confusion with cis/trans and double bonds.