How many stereoisomers are possible for Dichlorocyclobutane?

Ernest Z. Two of the dichlorocyclobutane isomers are optically active: ( 1R,2R )-1,2-dichlorocyclobutane and ( 1S,2S )-1,2-dichlorocyclobutane.

Does 1/2 Dichloropentane have a Stereocenter?

There are three stereoisomers for 1,2-dichlorocyclopentane.

Do meso compounds have stereoisomers?

A meso compound or meso isomer is a non-optically active member of a set of stereoisomers, at least two of which are optically active. This means that despite containing two or more stereogenic centers, the molecule is not chiral.

How many stereoisomers are possible for tartaric acid?

three stereoisomers
Tartaric acid therefore exists as three stereoisomers: two enantiomers (refcodes: TARTAC and TARTAL04) and one achiral meso form (refcode: TARTAM).

Which is the optically active isomer of dichlorocyclobutane?

Two of the dichlorocyclobutane isomers are optically active: (1R,2R)-1,2-dichlorocyclobutane and (1S,2S)-1,2-dichlorocyclobutane.

Is the 1, 4-dichlorocyclohexane a diastereomer or a stereoisomer?

The 1,4-dichlorocyclohexanes may exist as cis or trans stereoisomers. Both are achiral, since the disubstituted six-membered ring has a plane of symmetry. These isomers are diastereomers of each other, and are constitutional isomers of the 1,2- and 1,3- isomers.

Is the dichlorocyclobutane superimposable on its mirror image?

It is not superimposable on its mirror image, so it exists at two enantiomers: ( 1R,2R )-1,2-dichlorocyclobutane and ( 1S,2S )-1,2-dichlorocyclobutane. Thus, only two of the isomeric dichlorocyclobutanes are optically active. There are six dichlorocyclobutanes, two of them are optically active.

Why is the anti isomer of dimethylcyclobutane achiral?

Hence, syn-1,2-dimethylcyclobutane is achiral. This can be explained well with point groups. The anti isomer has the point group $C_2$ which does not feature a plane or centre of symmery. The syn isomer has the point group $C_mathrm{s}$ whose only element of symmetry is a plane, hence it is achiral.