Nomenclature and Isomerism

Nomenclature implies assigning proper name to a particular compound on the basis of certain standard rules to make their study systematic. The two basic systems employed for naming of the organic compounds are the trivial system and the IUPAC system. IUPAC refers to the International Union of Pure and Applied Chemistry. This system adopts certain uniform rules to write the names of the organic compounds in a systematic manner. The names which are assigned on the basis of these rules are called the IUPAC names. The IUPAC name of an organic compound consists of three parts: root word, prefix and suffix. There are some set rules that are applied for naming of organic compounds. The phenomenon of the existence of two or more compounds having the same molecular formula but different structures is known as isomerism. Organic compounds having the same molecular formula but different structures are known as isomers. Isomerism can be broadly classified into structural isomerism and stereoisomerism. The phenomenon, in which two or more compounds have same molecular formula but they differ from one another in their chemical structures is known as structural isomerism. Different types of structural isomerism are Chain isomerism, Position isomerism, Functional group isomerism and Metamerism.

To Access the full content, Please Purchase

  • Q1

    Prefix used for –NH2 functional group is

    Marks:1
    Answer:

    amino.

    Explanation:

    Prefix used for –NH2 group is amino.

    View Answer
  • Q2

    C7H16 is an

    Marks:1
    Answer:

    alkane.

    Explanation:

    General formula of alkanes–CnH2n+2

    General formula of alkenes–CnH2n

    General formula of alkynes–CnH2n-2

    General formula of alkyl group–CnH2n+1

    C7H16 follows the general formula of alkanes where n=7.

    View Answer
  • Q3

    Heptene belongs to alkene family. The IUPAC name of the next member of this series will be

    Marks:1
    Answer:

    octane.

    Explanation:

    Heptene is C7H14 and it is a member of alkene family.

    The next member of this series is C8H16. IUPAC name of this compound is octene.

    View Answer
  • Q4

    Marks:1
    Answer:

    6

    Explanation:

    The longest carbon atom chain in this compound is 6.

    View Answer
  • Q5

    ‘Non’ is the root word of the organic compound containing carbon atoms

    Marks:1
    Answer:

    9

    Explanation:

    When the number of carbon atoms in the parent chain is 9, we use ‘non’ as root word.

    View Answer