Is trans-2-butene have chirality center or no

Answer 1

Trans-2-butene does not have a chirality center. A chirality center (or chiral center) is typically a carbon atom that is attached to four different groups. In the case of trans-2-butene, the structure has two identical groups (hydrogens) attached to the second carbon atom, making it achiral. It does not meet the criterion for having four different substituents around any carbon atom, so it does not exhibit chirality.