Question

Which one of the following alkenes does not exhibit geometric isomerism ?

a) C4H8 b) C3H6

c) C5H10 d) C8H16

6. One of the following compounds exhibit geometrical isomerism

a) CH3CH2CH2CH3 b) CH3 – HC (CH3) – CH(CH3) –​

Answer 1

2-butene may exist as cis and trans isomers.

This is not a geometrical isomerism.

Option a)C4H8 may be answer.

Plz brainliest the answer

Answer 2

Answer:  $C3H6$ is the answer

Explanation:

Geometric isomerism is most commonly seen when a double bond is present.

(ii) the existence of several groups on a single double-bonded carbon.

(iii) the presence of at least one comparable group on nearby carbon atoms with double bonds.

                 ∴$C 3 H 6 ( C H 3-C H= C H 2 )$

• Does not display geometric isomerism since the group on the double-bonded carbon atom is identical.
• Geometric isomerism, a type of stereoisomerism also referred to as cis-trans isomerism or E-Z isomerism, is present in organic molecules.
• On this page, a definition of stereoisomers and a technique for spotting probable geometric isomers in compounds are provided.
• What role do isomers play?
• Isomers are molecules with the same chemical structure but distinct atomic configurations.
• By doing this, all configurational variations caused by the molecule's rotation in general or rotation around particular bonds are eliminated.
• Structural isomerism refers to the combining of atoms to create different isomers in different order.
• Stereoisomerism excludes structural isomerism.
• Stereoisomerism allows isomers to exhibit various spatial configurations even when their atoms are bonded together in the same sequence.
• One type of stereoisomerism is geometric isomerism

Geometric isomerism (cis/trans):

• The possibility of this free rotation about single bonds must be taken into account if you develop a structural formula rather than using models.
• You must acknowledge that this molecule is represented by both of these structures.
• Different molecules make up the two.
• To change one structure into the other, you would need to disassemble the models since the carbon-carbon double bond prohibits spinning.
• It's easy to perform that isomer test.
• Isomers exist when a model needs to be broken down to be changed into another.
• If all it needs is a slight twist, you haven't!
• The double bond in one maintains the placement of the two chlorine atoms on opposite sides.
• Trans isomers are what this is. (transatlantic) (from Latin, meaning "across")
• The two chlorine atoms that are trapped in one another are on the same side of the double bond.
• The precise term for this is "cis isomer." The phrase in Latin that means "on this side" (cis)

The significance of appropriately sketching geometric isomers:

         It can be quite simple to take shortcuts while sketching the structural formulas, which makes it very simple to forget geometric isomers during testing. As an illustration, it is quite tempting to characterize but-2-ene as

                                    $CH3CH=CHCH3$

If you read this kind of writing, there's a very good chance that you'll miss the presence of geometric isomers. Always depict compounds with carbon-carbon double bonds exhibiting the proper bond angles (120°) around the carbon atoms at the ends of the bond if there is even the slightest suggestion in the question that isomers may be involved.

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