Geometrical isomerism is shown by:
Geometrical isomerism is shown by:
The correct option is B >C=C<
A-Alkane, B- Alkene, C-Alkyne
Geometric Isomerism results most
commonly from C=C. The important property which introduces the feature
is the inability of the Carbon atoms to rotate relative to one another about
the double bond. This is due specifically to the π bond but I won't discuss
this part of the subject further on this site. The lack of rotation means the
same groups can be attached in different ways to achieve diastereomers.
The molecules have identical connectivity
so can't be described as structural isomers. There are two ways to name
compounds of this kind. When two of the four groups attached to the carbons
involved are hydrogen, the cis
and trans notation can be used.
When the other two constituents are on the same side of the molecules name is given the prefix cis.
Otherwise if the constituents are on opposite sides, the prefix is trans.
Option B is correct.
A-Alkane, B- Alkene, C-Alkyne
Geometric Isomerism results most
commonly from C=C. The important property which introduces the feature
is the inability of the Carbon atoms to rotate relative to one another about
the double bond. This is due specifically to the π bond but I won't discuss
this part of the subject further on this site. The lack of rotation means the
same groups can be attached in different ways to achieve diastereomers.
The molecules have identical connectivity so can't be described as structural isomers. There are two ways to name compounds of this kind. When two of the four groups attached to the carbons involved are hydrogen, the cis and trans notation can be used. When the other two constituents are on the same side of the molecules name is given the prefix cis. Otherwise if the constituents are on opposite sides, the prefix is trans.
Option B is correct.
