Ephedrine has four stereoisomers due to the presence of a chiral center in its structure. Specifically, it has two enantiomers: (R)-ephedrine and (S)-ephedrine, as well as two diastereomers: (R,S)-ephedrine and (S,R)-ephedrine. Therefore, the total number of stereoisomers for ephedrine is four.
2
Nonane has a total of 75 isomers, which includes straight chain isomers, branched chain isomers, and cyclic isomers.
There are two isomers for dibromopropane: 1,2-dibromopropane and 2,2-dibromopropane.
For the molecular formula C5H10, the cyclic structural isomers include cyclopentane, 1-methylcyclobutane, and 2-methylcyclobutane. Additionally, 1,2-dimethylcyclobutane can also be considered. In terms of stereoisomers for these cyclic structures, only 1,2-dimethylcyclobutane has stereoisomers due to the presence of chiral centers, while the others do not.
None, as it has 5 structural isomers in which none of are optically active.
2
Three
Nonane has a total of 75 isomers, which includes straight chain isomers, branched chain isomers, and cyclic isomers.
Three isomers of C2HfClBr are possible.
Tartaric acid has three stereoisomers: meso-tartaric acid and the two enantiomers, D-tartaric acid and L-tartaric acid.
C3H4O can have two isomers: propynal and cyclopropanone.
There are two isomers for dibromopropane: 1,2-dibromopropane and 2,2-dibromopropane.
There are a total of three structural isomers of C7H16 that have no secondary hydrogen atoms. These isomers are 2-methylhexane, 3-methylhexane, and 2,2-dimethylpentane.
For the molecular formula C5H10, the cyclic structural isomers include cyclopentane, 1-methylcyclobutane, and 2-methylcyclobutane. Additionally, 1,2-dimethylcyclobutane can also be considered. In terms of stereoisomers for these cyclic structures, only 1,2-dimethylcyclobutane has stereoisomers due to the presence of chiral centers, while the others do not.
Three
Isomers have the same chemical formulas, but different structures. They can be drastically different in structure, such as constitutional isomers, which differ in the way that certain groups are linked to a carbon back bone. They can be very subtly different as well, such as stereo isomers, which are almost completely same except for their biological activities and interactions with plane polarized light.
This compound (dibromomethane) has only one form. It does not form isomers .