PPT-12.4 Properties of Alkanes

The different uses of alkane compounds result from their physical properties including their solubility and density The solid alkanes that make up waxy coatings on fruits and vegetables help retain moisture inhibit mold and enhance appearance. Hydrocarbons. Alkanes-. Alkenes-. Alkynes-. Cycloalkanes- . alkanes in which all or some of the carbon atoms are arranged in rings. General Formulas. Alkanes- C. n. H. 2n+2. Alkenes- C. n. H. 2n. Alkynes- C. Alkanes. Chem. 108. Chapter 2. 1. 2. General Molecular Formula of Hydrocarbons. (Homologous Series) . C. n. H. 2n+2 . Saturated. Alkanes. (containing. a single ring). . C. n. H. 2n . Cycloalkanes. Sources . and Uses of Alkanes. Petro. leum. , which literally means . rock . oil. is the main source of alkanes. Petroleum is a mixture of hundreds of hydrocarbons, mostly alkanes with varying numbers of carbons and varying degrees of branching. Physical Properties of Alkanes. Non polar compounds. Insoluble in water. Less dense than water and so will float on top of the water. Dissolve in organic solvents . . (. eg. dry cleaning fluid) and in each other (. Lecture 12. Organic chemistry. What distinguishes organic chemistry from other areas of chemistry?. Origins – compounds from plants and animals. Organic compounds were though to have a “v. ital force” and as such . Straight chain alkanes will have symmetrical . electronegativities. so they will behave as non-polar molecules. Since ‘like dissolves like’ the alkanes will all be soluble in . eachother. However… since water is polar; alkanes will NOT dissolve in water… think of pouring oil on water. . Alkanes. Dr. . Shatha. I . Alaqeel. 1. 108 . Chem. Learning Objectives. Chapter one discusses the following topics and the student by the end of this chapter will:. . Know the classification of hydrocarbon. Organic Compounds: Alkanes and Their Stereochemistry. Organic Chemistry I. S. Imbriglio. Functional Groups. A . functional group. . is a group of atoms within a molecule that has a . ___________________________.. Chemistry 11. Ms. McGrath. Classifying Hydrocarbons. Please copy the concept map on page 331 of your textbook.. Hydrocarbons. Consists of . linear. (as opposed to forming rings of carbon atoms) chains of carbon atoms.. Conformational and Geometrical Isomerism. Hydrocarbons. . are . compounds that contain only carbon and hydrogen. . There are three main classes of hydrocarbons, based on the types of carbon–carbon bonds present. . The Structure of Alkanes. Nomenclature of Organic Compounds. Alkyl groups. Numbering the parent carbon chain. The root name is that of the longest continuous carbon chain (. parent carbon chain. ) . Groups attached to the main chain are called . Alkanes-. Alkenes-. Alkynes-. Cycloalkanes- . alkanes in which all or some of the carbon atoms are arranged in rings. General Formulas. Alkanes- C. n. H. 2n 2. Alkenes- C. n. H. 2n. Alkynes- C. n. H. Crude oil, hydrocarbons and alkanes. Carbon compounds as fuels and feedstock. Crude. oil. A. finite resource. Consisting. mainly of plankton that was buried in the mud, crude oil is the remains of ancient biomass.. structures. . Arrow formalism & . m. olecular framework. Introduction to alkanes. . Isomers. . IUPAC naming of alkanes. . Alkyl halides & cycloalkanes. Functional groups: where the action is.