Hydrocarbon & Substituted Hydrocarbons PDF

Substituted Hydrocarbons and Their Reactions Section 22.1 Alkyl Halides and Aryl Halides Section 22.2 Alcohols, Ethers, and Amines Section 22.3 Carbonyl Compounds Section 22.4 Other Reactions of Organic Compounds Section 22.5 Polymers Click a hyperlink or...

Substituted Hydrocarbons and Their Reactions Section 22.1 Alkyl Halides and Aryl Halides Section 22.2 Alcohols, Ethers, and Amines Section 22.3 Carbonyl Compounds Section 22.4 Other Reactions of Organic Compounds Section 22.5 Polymers Click a hyperlink or folder tab to view the corresponding slides. Exit Section 22.1 Alkyl Halides and Aryl Halides Define functional group, aliphatic compound: a and give examples. nonaromatic hydrocarbon, such as an Compare and contrast alkane, an alkene, or an alkyl and aryl halide alkyne structures. Evaluate the boiling points of organic halides. Section 22.1 Alkyl Halides and Aryl Halides (cont.) functional group plastic halocarbon substitution reaction alkyl halide halogenation aryl halide A halogen atom can replace a hydrogen atom in some hydrocarbons. Functional Groups In an organic molecule, a functional group is an atom or group of atoms that always reacts in a certain way. Addition of a functional group to a hydrocarbon always produces a substance with different chemical and physical properties. Double and triple bonds between carbon atoms are considered functional groups. Functional Groups (cont.) Organic Compounds Containing Halogens Any organic compound that contains a halogen substituent is called a halocarbon. An alkyl halide is an organic compound containing a halogen atom covalently bonded to an aliphatic carbon atom. An aryl halide is an organic compound containing a halogen bonded to an aromatic group.  Organic Compounds Containing Halogens (cont.) In naming halocarbons, a prefix indicates which halogen is present. If there is more than a single halogen, they are listed alphabetically. Organic Compounds Containing Halogens (cont.) Halocarbons have higher boiling points because they have an increasing tendency to form temporary dipoles. Dipoles attract each other, and require more energy to separate. A plastic is a polymer that can be heated and molded while relatively soft. Vinyl chloride Molecular formula : C2H3Cl H2C=CHCl Vinyl chloride is used to make polyvinyl chloride (PVC). PVC is used to make a variety of plastic products, including pipes, wire and cable coatings, and packaging materials. Vinyl chloride is also known as chloroethene, chloroethylene, and ethylene monochloride Organic Compounds Containing Halogens (cont.) Substitution Reactions Nearly all synthetic organic compounds begin with petroleum. A substitution reaction is one in which one atom or a group of atoms in a molecule is replaced by another atom or group of atoms Hydrogen atoms in an alkane can be replaced by atoms of halogens in a process called halogenation. Substitution Reactions (cont.) Substitution Reactions (cont.) Once halogenated, alkanes can undergo further reactions. Reacting an alkyl halide with a basic solution results in replacement of the halogen atom with an –OH group to form an alcohol.  Organic Compounds and Smells Chemical Compounds Responsible for Fruit Odors The distinct smells of apples, pineapples, and oranges primarily come from esters, which are organic compounds formed through the reaction of an alcohol and a carboxylic acid. Methyl butyrate is responsible for the smell of apples.  Organic Compounds and Smells Chemical Compounds Responsible for Fruit Odors Ethyl butyrate gives pineapple its characteristic odor. Limonene is the source of the scent of lemons; vanillin gives the distinctive scent of vanilla; Cinnamaldehyde is the scent of cinnamon; and methyl salicylate is responsible for the smell of oil of wintergreen Organic Compounds and Smells Organic Compounds and Smells Organic Compounds and Smells Putrescine (butane-1,4-diamine) and cadaverine (pentane-1,5-diamine) are foul-smelling organic compounds found in decaying animals. Alcohols Oxygen commonly forms two covalent bonds to form a stable octet. An oxygen-hydrogen group covalently bonded to a carbon atom is called a hydroxyl group. An organic compound in which a hydroxyl group replaces a hydrogen is called an alcohol. Alcohols (cont.) Alcohols (cont.) Alcohol is polar and mixes completely with water. Denatured alcohol is ethanol with small amounts of noxious materials added to it. Alcohol names are based on the alkane names, with the ending –ol.  Naming and Classifying Alcohols For each of the following alcohols, give the systematic name and specify whether the alcohol is primary, secondary, or tertiary. Primary Alcohol Secondary alcohol Tertiary Alcohol Ethers An ether is an organic compound containing an oxygen bonded to two carbon atoms. Ethers (cont.) Ethers have no hydrogen atoms bonded to their oxygen atoms, so they cannot form hydrogen bonds with each other. Ethers are volatile and have low boiling points. Ethers with identical chains are named by the chain followed by the word ether. Ethers with different chains are named in alphabetical order followed by ether.  DIETHYL ETHER It is a colourless, highly volatile, sweet- smelling ("ethereal odour"), extremely flammable liquid. It belongs to the ether class of organic compounds. Amines Amines contain nitrogen atoms bonded to carbon atoms in aliphatic chains or aromatic rings. Amines (cont.) Amines are primary, secondary, or tertiary depending on if there are one, two, or three hydrogen atoms replaced by organic groups. Amines have the suffix –amine. Section 22.2 Assessment Which of the following is an alcohol? A. cyclohexamine B. 1-chlorobutanol C. bromobutene A. A D. butylpropyl ether B. B 0% 0% C.0% C0% D. D Section 22.2 Assessment Which functional group is present in an alcohol? A. hydroxyl group B. halogen C. aromatic ring A. A D. amino group B. B 0% 0% C.0% C0% D. D Section 22.3 Carbonyl Compounds Identify the structures of electronegative: carbonyl compounds, indicates the relative including aldehydes, ability of an element’s ketones, carboxylic atoms to attract acids, esters, and electrons in a chemical amides. bond Discuss the properties of compounds containing the carbonyl group. Section 22.3 Carbonyl Compounds (cont.) carbonyl group carboxyl group aldehyde ester ketone amide carboxylic acid condensation reaction Carbonyl compounds contain a double- bonded oxygen in the functional group. Organic Compounds Containing the Carbonyl Group An oxygen atom double-bonded to a carbon atom is a carbonyl group. Aldehydes are organic compounds in which the carbonyl group is located at the end of the carbon chain and is bonded to a carbon atom on one side and a hydrogen on the other side. Aldehydes are named with the suffix –al. Organic Compounds Containing the Carbonyl Group (cont.) Organic Compounds Containing the Carbonyl Group (cont.) Organic Compounds Containing the Carbonyl Group (cont.) A ketone is an organic compound in which the carbon of the carbonyl group is bonded to two other carbon atoms. Ketones are named by changing the –e at the end of the alkane name to –one, and including a number before the name to indicate the position of the ketone group. Ketones and aldehydes share many chemical and physical properties because their structures are similar. Organic Compounds Containing the Carbonyl Group (cont.) Ketones are popular solvents for moderately polar substances. Ketones are somewhat soluble in water. Organic Compounds Containing the Carbonyl Group (cont.) Carboxylic Acids Carboxylic acids are organic compounds that have a carboxyl group. Carboxyl groups are carbonyls bonded to a hydroxyl group Carboxylic acids are named by changing the –ane to –anoic acid. Carboxylic acids can be produced by the oxidation of alcohols and aldehydes. Carboxylic Acids (cont.)  Butyric acid means the acid of butter, as it was first discovered in rancid butter (butyric acid is hydrolyzed from the glyceride and causes a very unpleasant odor Aspirin Tablet Carboxylic Acids (cont.) Carboxylic groups are represented by –COOH. Carboxylic acids are polar and reactive, and ionize in water to form acids. Organic Compounds Derived from Carboxylic Acids An ester is any organic compound with a carboxyl group in which the hydrogen in the hydroxyl group is replaced by an alkyl chain. Organic Compounds Derived from Carboxylic Acids (cont.) To name an ester, write the alkyl group followed by the name of the acid with the –oic acid ending replaced with –oate. Esters are polar molecules and many are volatile and sweet smelling. Many esters are found in fruits and flowers. Organic Compounds Derived from Carboxylic Acids (cont.) An amide group is an organic compound in which the –OH group of a carboxylic acid is replaced by a nitrogen atom bonded to other atoms. Organic Compounds Derived from Carboxylic Acids (cont.) The amide functional group is found repeated many times in natural proteins and some synthetic materials. Condensation Reactions In a condensation reaction, two smaller organic molecules combine to form a more complex molecule, accompanied by the loss of a small molecule such as water. Condensation reactions are elimination reactions that form bonds between two atoms not previously bonded. Section 22.3 Assessment Which of the following is the carbonyl group? A. COOH B. C=O C. CONH2 A. A D. R-O-R′ B. B 0% 0% C.0% C0% D. D Section 22.3 Assessment Which of the following does NOT contain a carbonyl group? A. ketones B. esters C. amines A. A D. aldehydes B. B 0% 0% C.0% C0% D. D Section 22.4 Other Reactions of Organic Compounds Classify an organic reaction into one of five categories: substitution, addition, elimination, oxidation-reduction, or condensation. Use structural formulas to write equations for reactions of organic compounds. Predict the products of common types of organic reactions. catalyst: a substance that increases the rate of a chemical reaction by lowering activation energies but is not consumed in the reaction Section 22.4 Other Reactions of Organic Compounds (cont.) elimination reaction addition reaction dehydrogenation reaction hydration reaction dehydration reaction hydrogenation reaction Classifying the chemical reactions of organic compounds makes predicting products of reactions much easier. Classifying Reactions of Organic Substances Using combinations of reactions allows chemical industries to convert simple molecules from petroleum and natural gas into large, complex organic molecules. Classifying Reactions of Organic Substances (cont.) The formation of alkenes from alkanes is an elimination reaction, a reaction in which a combination of atoms is removed from two adjacent atoms forming an additional bond between the two carbon atoms. Classifying Reactions of Organic Substances (cont.) A reaction that eliminates two hydrogen atoms is called a dehydrogenation reaction. Classifying Reactions of Organic Substances (cont.) An elimination reaction in which the atoms removed form water is called a dehydration reaction. Classifying Reactions of Organic Substances (cont.) Addition reactions result when other atoms bond to two atoms bonded by a double or triple covalent bonds. A hydration reaction is an addition reaction in which a hydrogen atom and hydroxyl group from a water molecule add to a double or triple bond. Classifying Reactions of Organic Substances (cont.) A hydrogenation reaction involves the addition of hydrogen to atoms in a double or triple bond. Catalysts are usually needed in hydrogenation reactions. Hydrogenation reactions are commonly used to convert liquid unsaturated fats into saturated fats that are solid at room temperature. Classifying Reactions of Organic Substances (cont.) Classifying Reactions of Organic Substances (cont.) Many organic compounds can be converted to other compounds by oxidation-reduction reactions. Classifying Reactions of Organic Substances (cont.) Predicting Products of Organic Reactions Each type of reaction—substitution, addition, elimination, oxidation-reduction, and condensation—can be used to predict the products of other organic reactions of the same types. Section 22.4 Assessment Which type of reaction normally produces an alcohol from an alkene? A. substitution B. elimination C. hydration A. A D. addition B. B 0% 0% C.0% C0% D. D Section 22.4 Assessment What type of reaction is the following? alkyl halide → alkene A. halogenation B. elimination A. A C. addition B. B D. substitution 0% 0% C.0% C0% D. D Section 22.5 Polymers Diagram the relationship molecular mass: the between a polymer and mass of one molecule of the monomers from a substance which it forms. Classify polymerization reactions as addition or condensation. Predict polymer properties based on their molecular structures and the presence of functional groups. Section 22.5 Polymers (cont.) polymer condensation polymerization monomer thermoplastic polymerization reaction thermosetting addition polymerization Synthetic polymers are large organic molecules made up of repeating units that are linked together by addition or condensation reactions. The Age of Polymers Polymers are large molecules consisting of many repeating structural units. The turn of the 20th century saw the advent of such polymers as rubber and celluloid. Reactions Used to Make Polymers (cont.) A monomer is a molecule from which a polymer is made. A reaction in which monomer units are bonded together to form a polymer are called polymerization reactions. In addition polymerization all of the atoms present in the monomers are retained in the polymer product. Reactions Used to Make Polymers (cont.) Reactions Used to Make Polymers (cont.) Reactions Used to Make Polymers (cont.) Reactions Used to Make Polymers (cont.) Condensation polymerization takes place when monomers containing at least two functional groups combine with the loss of a small by-product, usually water. Properties and Recycling of Polymers Polymers are inexpensive and easy to make. Polymers have a wide range of properties. They are easy to mold into different shapes. Thermoplastic polymers can be melted and molded repeatedly into shapes that are retained when cooled. Thermosetting polymers can be molded when first prepared, but cannot be remelted. Properties and Recycling of Polymers (cont.) As fossil fuel supplies are depleted, recycling polymers becomes more important. Section 22.5 Assessment The smaller, repeating units that make up a polymer are called ____. A. structural units B. polyunits C. monomers A. A D. building blocks B. B 0% 0% C.0% C0% D. D Section 22.5 Assessment One way polymers are synthesized is through ____ reactions. A. condensation B. elimination C. substitution A. A D. dehydration B. B 0% 0% C.0% C0% D. D Chemistry Online Study Guide Chapter Assessment Standardized Test Practice Image Bank Concepts in Motion  Section 22.1 Alkyl Halides and Aryl Halides Key Concepts The substitution of functional groups for hydrogen in hydrocarbons creates a wide variety of organic compounds. An alkyl halide is an organic compound that has one or more halogen atoms bonded to a carbon atom in an aliphatic compound.  Section 22.2 Alcohols, Ethers, and Amines Key Concepts Alcohols, ethers, and amines are formed when specific functional groups substitute for hydrogen in hydrocarbons. Because they readily form hydrogen bonds, alcohols have higher boiling points and higher water solubilities than other organic compounds.  Section 22.3 Carbonyl Compounds Key Concepts Carbonyl compounds are organic compounds that contain the C=O group. Five important classes of organic compounds containing carbonyl compounds are aldehydes, ketones, carboxylic acids, esters, and amides.  Section 22.4 Other Reactions of Organic Compounds Key Concepts Most reactions of organic compounds can be classified into one of five categories: substitution, elimination, addition, oxidation-reduction, and condensation. Knowing the types of organic compounds reacting can enable you to predict the reaction products.  Section 22.5 Polymers Key Concepts Polymers are large molecules formed by combining smaller molecules called monomers. Polymers are synthesized through addition or condensation reactions. The functional groups present in polymers can be used to predict polymer properties. Aryl halides contain what two groups? A. nitrogen and aliphatic hydrocarbon chain B. nitrogen and aromatic hydrocarbon ring A. A C. halogen and aromatic B. B hydrocarbon ring C.0% C0% D. halogen and aliphatic 0% 0% hydrocarbon chain D. D Amines contain which function group? A. –OH B. –Br C. R-O-R′ A. A D. –NH2 B. B 0% 0% C.0% C0% D. D Which of the following does NOT contain the carbonyl group? A. ketones B. ethers C. aldehydes A. A D. amides B. B 0% 0% C.0% C0% D. D What is an addition reaction in which a hydrogen atom and hydroxyl group from a water molecule add to a double or triple bond called? A. elimination reaction B. hydration reaction A. A B. B C. dehydration reaction C.0% C0% D. hydrogenation reaction 0% 0% D. D A type of plastic that can be molded only when first produced is called a ____. A. thermoplastic B. polythermal C. setting plastic A. A D. thermosetting B. B 0% 0% C.0% C0% D. D What are the products of this reaction? CH3CH2Br + NaOH → ____ A. CH3CH2Na + BrOH B. CH3CH2OH + NaBr A. A C. CH3CH2OHNaBr B. B D. CH3CH3 + Na3BrO 0% 0% C.0% C0% D. D What type of compound does this formula represent? CH3CH2CH2COOH A. ester B. ether A. A C. carboxylic acid B. B C.0% C0% D. ketone 0% 0% D. D How many carbon atoms are present in 2-ethyl pentane? A. 2 B. 5 C. 7 A. A D. 8 B. B 0% 0% C.0% C0% D. D What are the oxidation numbers of the elements in H2SO4? A. H = +1, S = +6, O = –2 B. H = +2, S = +4, O = –4 C. H = +1, S = +4, O = –1 A. A D. H = +1, S = –10, O = +2 B. B 0% 0% C.0% C0% D. D Which type of compound is formed when accepts H+ ions? A. Brønsted-Lowery base B. Brønsted-Lowery acid C. conjugate base A. A D. conjugate acid B. B 0% 0% C.0% C0% D. D Click on an image to enlarge.  Organic Compounds and Their Functional Groups 4 Common Polymers Click any of the background top tabs to display the respective folder. 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