Question

What does cis isomer mean?

Answer 1

Hint: The atoms in cis-trans isomers have different spatial configurations in three-dimensional space, which is a form of stereoisomerism. In organic chemistry, cis isomers have functional groups on the same side of the carbon chain, while trans isomers have functional groups on opposite sides.

Complete answer:
The atoms in cis-trans isomers have different spatial configurations in three-dimensional space, which is a form of stereoisomerism. In organic chemistry, cis isomers have functional groups on the same side of the carbon chain, while trans isomers have functional groups on opposite sides.
Both organic and inorganic molecules may exhibit this form of isomerism. The prefixes "cis" and "trans" are Latin in origin and mean "this side of" and "other side of," respectively. There are also cis-trans isomers of certain coordination complexes.
The physical properties of the cis-trans isomers of a compound vary in certain ways. Differences in the dipole moment of the molecule or differences in the spatial structure of atoms will cause these differences.
The melting points of trans isomers are normally higher than those of their cis counterparts. They also have a lower solubility in solvents that are naturally inert. It's been proposed that trans isomers' densities are smaller than those of cis isomers.
The individual bond dipole moments of trans isomers, in general, cancel each other out since they are on opposite sides. The steric association of the substituents explains why the cis isomers of acyclic structures are less stable than the trans variation.

Note:
Both organic and inorganic molecules may exhibit this form of isomerism. The prefixes "cis" and "trans" are Latin in origin and mean "this side of" and "other side of," respectively. There are also cis-trans isomers of certain coordination complexes.