Question

iupac name of H2C=C=CH2.​

Answer 1

IUPAC NAME : 1 , 2 - eythne

Answer 2

IUPAC name of CH₂=C=CH₂

Explanation:

• IUPAC name of the compound CH₂=C=CH₂ is Prop-1,2-diene.
• IUPAC naming can be done on the basis of IUPAC Nomenclature which includes root word, suffix, numbering.
• Root words includes the number of carbons in a long chain present in a structure. Here, total number of carbon is 3. So, root word is prop.
• Suffix includes type of bonding i.e. single bond, double bond and triple bond. Suffix for containing single bonds(alkanes) used is ane, that is for double bond(alkenes) is ene and for triple bond(alkynes) is yne. Here, the structure contains double bond. So, suffix is ene.
• Numbering start with the priority group that functional groups > triple bond>double bond> single bond. Here, structure is symmetrical so numbering can be done left or right end as it is same from both the sides.
• As structure contain two double bond so di is used.

So, IUPAC name of CH₂=C=CH₂ is Prop-1,2-diene.