I thought that a molecule needed 2 different atoms at each end for it to be a cis-trans isomer..same goes for 1-chlorobut-2-ene
there needs to be 2 different groups on each carbon in the double bond in order for the molecule to be considered a cis-trans isomer. for 1-chlorobut-1-ene, there is a chlorine atom and a hydrogen atom on carbon 1 and an ethyl group and a hydrogen atom on carbon 2. therefore, it is a cis-trans isomer because there are 2 different groups on each of the carbons in the double bond. it's similar with 1-chlorobut-2-ene. on carbon 1, there's a chloromethyl group and a hydrogen atom and on carbon 2, there is a methyl group and a hydrogen atom, which is why this molecule also displays geometric isomerism. hope this helps
there needs to be 2 different groups on each carbon in the double bond in order for the molecule to be considered a cis-trans isomer. for 1-chlorobut-1-ene, there is a chlorine atom and a hydrogen atom on carbon 1 and an ethyl group and a hydrogen atom on carbon 2. therefore, it is a cis-trans isomer because there are 2 different groups on each of the carbons in the double bond. it's similar with 1-chlorobut-2-ene. on carbon 1, there's a chloromethyl group and a hydrogen atom and on carbon 2, there is a methyl group and a hydrogen atom, which is why this molecule also displays geometric isomerism. hope this helps
Ah, this clears up EVERYTHING. Thank you lifesaver!!