For example, the alkanes are fairly unreactive under ordinary conditions. October 24, 2017. For example, chloromethane, CH3CI, is composed of the methyl group, CH3-, (obtained from methane, CH4, by the loss of a hydrogen atom) linked to the substituent chlorine atom. For example, the polar hydroxyl group in the alkanols promotes solubility in water but the non-polar alkyl group opposes it. For example, the boiling points of the alkanes increase down the series, so that the first four members are gases at room temperature and standard pressure; members with five to seventeen carbon atoms per molecule are volatile liquids; while the higher members are wax-like solids. If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. Another way to prevent getting this page in the future is to use Privacy Pass. Tony loves Sugar and has been in love with Don Williams since he was a toddler on Diapers. Thus, the compound that is formed by substitution can be considered as being made up of the alkyl group and the substituent group. Your IP: 5.9.117.98 For example, the polar hydroxyl group in the, on "Significance and Properties of the Homologous Series", Electronic Configuration and Properties of the Tra…, Electronic Configuration and Properties of the Transition Elements, Activity Series and the Significance of Hydrogen, Extraction and Uses of the Lanthanide Elements. Thus, the presence of the functional group or groups determines the chemical, properties of a homologous series. The chemical reactivity of an alkyl compound is determined mainly by the substituent group. A homologous series is a family of organic compounds which follows a regular structural pattern, in which each successive member differs in its molecular formula by a –CH2 – group. Cloudflare Ray ID: 5f86e7ee4949178a These groups are referred to as the functional groups, e.g., the hydroxyl group, -OH, the amino group, -NH2, the carboxyl group, -COOH, and the double covalently bonded carbon atoms, C=C. Students can explore more about it here. (iv) All compounds in the series have similar chemical properties because of the presence of the same functional group. A homologous series (homos is Greek for “the same as”) can be defined as the group of compounds in which the various members have similar structural features and similar chemical properties and the successive members differ in their molecular formula by one methylene (CH2) group. Organic compounds belonging to the main class can be divided into different families, known as homologous series, on the basis of similarity in structure and chemical properties. Copyright-2020 GulpMatrix [GLEANED UTILITY LANDING PAGES]. Explanations of Prevost Theory of Heat Radiation, TechPrep : Another Free Facebook Site for Programmers, 18 Amazing Facts on Earth’s Perfect Location in Space, Carcinogenic Effects of Chewing Betel Nut, Emergency? Performance & security by Cloudflare, Please complete the security check to access. The simplest series of compounds in organic chemistry is the alkanes. The numerous organic compounds can be grouped into a comparatively small number of series or families of compounds known as homologous series. Properties of Homologous Series. When two or more functional groups occur in one molecule, the properties of one are often modified or influenced by the presence of the others. From the table below, we see that each individual member of the alkane series differs from the preceding or the following member by one carbon atom and two hydrogen atoms, i.e. –CH, Other homologous series include the alkenes, C, Easy Ways to Memorize the first 20 Elements of the Periodic Table, Many homologous series can be regarded as being derived from the alkanes by the substitution of one or more of the, The alkyl group of a compound is fairly inert chemically because of the stability of the carbon-hydrogen bonds. Hey Edubuzzer, welcome to the learning platform, EDUBUZZ NOTES. He blogs Passionately on Science and Technology related niches and spends most of his time on Research in Content Management and SEO. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. Physical Properties: The physical properties of the members change gradually as the number of carbon atoms per molecule increases. • The univalent group which is formed from an alkane by the loss of a hydrogen atom is known as the alkyl group. (vi) The homologues can be prepared by almost similar methods. Here at EBN, I write about Chemistry, Physics, Biology and Tips & Tricks. In order to post comments, please make sure JavaScript and Cookies are enabled, and reload the page. Effect of the Alkyl and Functional Groups. Such a family of compounds is known as a homologous series and each individual member is referred to as a homologue. Start Charging Your iphone By Hand, Scan the Entire Internet in less than an Hour with ZMAP, Fascinating Revelations On Expeditions to Mars, 11 Amazing Facts About the Human Body You Never Knew, How to Improve Computer Performance by Defragmentation, Delete All Your Internet Data With Justdelete.me, From the table below, we see that each individual member of the alkane series differs from the preceding or the following member by one carbon atom and two hydrogen atoms, i.e. Home » Significance and Properties of the Homologous Series, Posted By: Tony Onwujiariri The physical properties generally increase as the molecular mass increases. –CH2– group. –CI. Such compounds when arranged in order of their molecular masses constitute a series called A homologous series is a family of hydrocarbons with similar chemical properties who share the same general formula. The table above gives the general formulae and specifies the functional groups present in ma y of the homologous series which are derived from the alkanes. The alkyl group of a compound is fairly inert chemically because of the stability of the carbon-hydrogen bonds. For example, the boiling points of the alkanes increase down the series, so that the first four members are gases at room temperature and standard pressure; members with five to seventeen carbon atoms per molecule are … Chemical Properties: The members show similar chemical properties. Similarly, the melting points and densities of the alkanes also increase, while their solubility in water decreases down the series.

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