Question

What is a parent chain?
A.Longest carbon chain
B.Shortest carbon chain
C.Chain with a bent
D.Chain with side chains

Answer 1

The International Union of Pure and Applied Chemistry (IUPAC) nomenclature of organic chemistry is a technique of naming organic chemical compounds that is approved in chemical nomenclature (IUPAC). It's in the Journal of Organic Chemistry's Nomenclature (informally called the Blue Book). Every potential organic molecule should, in theory, have a name that can be translated into an unambiguous structural formula. Inorganic chemistry has its own IUPAC terminology.

Complete answer: A parent structure, parent compound, parent name, or simply parent is a compound that consists of an unbranched chain of skeleton atoms (not necessarily carbon) or an unsubstituted monocyclic or polycyclic ring system in the IUPAC nomenclature of chemistry. Functional parents are parent structures with one or more functional groups that are not particularly designated by a suffix. In IUPAC nomenclature, the names of parent structures are utilised as the foundation for systematic names. A parent hydride is a molecule that has one or more hydrogen atoms in it. A set standard population of hydrogen atoms is connected to a skeletal structure in parent hydrides. Inorganic chemistry makes considerable use of parent hydrides, which are likewise utilised in organic nomenclature. Affixes, which designate substituents that substitute hydrogen, are added to the parent name to create a systematic name. To be a parent chain, this chain must meet the requirements below.
It should contain as many suffix functional group substituents as possible. In contrast to halogen substituents, suffix means that the parent functional group should have a suffix. If there are many functional groups, the one with the highest priority should be utilised.
It should contain as many numerous bonds as possible.
It should be as long as possible.
It should have as many substituents or branches as possible as prefixes.
It should contain as many single bonds as possible.
And hence the correct answer is option A.

Note:
The parent chain is the longest continuous chain of carbon atoms. If no largest chain can be found because two or more chains have the same length, the parent chain is the one with the most branches.