Question

What is homologous and homelogue?

Answer 1

Homologous series

In organic chemistry, a homologous series is a series of compounds with the same general formula, usually varying by a single parameter.[1] This can be the length of a carbon chain,[1] for example in the straight-chained alkanes (paraffins), or it could be the number of monomers in a homopolymer such as amylose.[2]

Compounds within a homologous series typically have a fixed set of functional groupsthat gives them similar chemical and physical properties. (For example, the series of primary straight-chained alcohols has an hydroxyl at the end of the carbon chain.) These properties typically change gradually along the series, and the changes can often be explained by mere differences in molecular size and mass. The name "homologous series" is also often used for any collection of compounds that have similar structures or include the same functional group, such as the general alkanes(straight and branched), the alkenes (olefins), the carbohydrates, etc. However, if the members cannot be arranged in a linear order by a single parameter, the collection may be better called a "chemical family" or "class of homologous compounds" than a "series".

The concept of homologous series was proposed in 1843 by the French chemist Charles Gerhardt.[3] A homologation reactionis a chemical process that converts one member of a homologous series to the next member.

Answer 2

Homologous series---the series of orgainic compound in which two succevily compound in differ by cH2 and 14u molecular mass is called homelogous series

Homologous series has same chemical properties but different physical properties.

Homelogue------ the series of homologous which belongs to same molucules is called homologue