szénhidrogénsorozatban

szénhidrogénsorozatban is a Hungarian term that translates to "in a homologous series of hydrocarbons". A homologous series is a group of organic compounds that have the same functional group and similar chemical properties, and in which the successive members differ by CH2 group. In the context of hydrocarbons, this refers to series like alkanes, alkenes, and alkynes.

For instance, the alkane homologous series starts with methane (CH4), followed by ethane (C2H6), propane (C3H8), and so on. Each successive alkane molecule gains an additional methylene (CH2) unit. This gradual addition of CH2 groups leads to a predictable change in physical properties, such as increasing boiling points and melting points, as the molecular size and van der Waals forces increase. Chemically, these compounds exhibit similar reactivity patterns due to the presence of the same functional groups (single bonds in alkanes, double bonds in alkenes, triple bonds in alkynes). The concept of homologous series is fundamental to understanding organic chemistry and provides a framework for classifying and predicting the behavior of vast numbers of organic compounds.