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Carbon Chemistry Carbon is unusual

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Presentation on theme: "Carbon Chemistry Carbon is unusual"— Presentation transcript:

1 Carbon Chemistry Carbon is unusual
Bonds strongly to itself Forms long chains or rings Biomolecule – molecule that functions in maintaining and reproducing life Organic compounds – vast majority of carbon compounds Exceptions – oxides and carbonates

2 A. Carbon Bonding When carbon has 4 atoms bound to it these atoms have a tetrahedral shape.

3 A. Carbon Bonding Double bond Triple bond
Sharing of 2 pairs of electrons Triple bond Sharing of 3 pairs of electrons

4 B. Alkanes Hydrocarbons – compounds composed of carbon and hydrogen
Saturated – all carbon-carbon bonds are single bonds Unsaturated – containing carbon-carbon multiple bonds

5 B. Alkanes Alkanes – saturated hydrocarbons

6 B. Alkanes Normal, straight-chain or unbranched hydrocarbons
Contain strings or chains of carbon atoms Representations

7 B. Alkanes

8 C. Structural Formulas and Isomerism
Structural isomerism – occurs when 2 molecules have the same atoms but different bonds

9 D. Naming Alkanes Basic principles: The name for an alkane is based on Greek root with the suffix –ane.

10 D. Naming Alkanes Basic principles: For branched hydrocarbons use the longest continuous chain for the root name.

11 D. Naming Alkanes Basic principles Alkanes missing one H atom can have another hydrocarbon attached at the missing H point.

12 D. Naming Alkanes Basic principles: Specify the names of substituents by numbering the C atoms starting at the end closest to the branching.

13 D. Naming Alkanes Basic principles:

14 D. Naming Alkanes Basic principles: If a substituent occurs more than once use a prefix to show this. 2,3-dimethylpentane

15 D. Naming Alkanes Page 710

16 E. Petroleum Hydrocarbons are an energy resource.

17 E. Petroleum Petroleum – thick, dark liquid composed mostly of hydrocarbon compounds Natural gas – consists mostly of methane, usually associated with petroleum deposits

18 F. Reactions of Alkanes Combustion – reaction with oxygen
Substitution – one or more H atoms are replaced with different atoms

19 F. Reactions of Alkanes Dehydrogenation – one or more H atoms are removed and the product is an unsaturated hydrocarbon

20 G. Alkenes and Alkynes Alkenes – hydrocarbon containing carbon-carbon double bonds General formula CnH2n Alkynes – hydrocarbons containing carbon-carbon triple bonds General formula CnH2n - 2

21 G. Alkenes and Alkynes

22 G. Alkenes and Alkynes Reactions of Alkenes Addition reactions – new atoms form single bonds to the carbons formerly involved in a double or triple bond Hydrogenation – use H2 as the reactant to be added Halogenation – addition of halogen atoms Polymerization – joining of many small molecules to form a large molecule

23 H. Aromatic Hydrocarbons
Aromatic hydrocarbons – cyclic unsaturated hydrocarbons with strong aromas

24 H. Aromatic Hydrocarbons
Benzene – simplest aromatic hydrocarbon

25 I. Naming Aromatic Compounds
Monosubstituted benzenes – use the substituent name as a prefix of benzene

26 I. Naming Aromatic Compounds
Disubstituted benzenes – use numbers to indicate the position of substituents and the substituent name as a prefix of benzene

27 I. Naming Aromatic Compounds
Complex aromatic molecules

28 J. Functional Groups Functional group – additional atom or groups of atoms (containing elements in addition to H and C) found on a mostly hydrocarbon molecule

29 K. Alcohols All alcohols contain the –OH group.

30 K. Alcohols

31 L. Properties and Uses of Alcohols
Methanol starting material for making acetic acid and many adhesives, fibers and plastics motor fuel Ethanol Fermentation product Fuel additive used to make gasohol

32 L. Properties and Uses of Alcohols
Other alcohols Ethylene glycol – automotive antifreeze Phenol – production of adhesives and plastics

33 M. Aldehydes and Ketones
Carbonyl group – carbon oxygen group found in both aldehydes and ketones Ketone – carbonyl group is bonded to two carbon atoms

34 M. Aldehydes and Ketones
Aldehyde – carbonyl group always appears on the end of the hydrocarbon chain and has at least one H atom bonded to the carbonyl group

35 M. Aldehydes and Ketones

36 N. Naming Aldehydes and Ketones
Use the parent alkane name. Remove the e and replace it with al.

37 N. Naming Aldehydes and Ketones
Use the parent alkane name. Remove the e and replace it with one. Use a number to indicate the position of the carbonyl group in the hydrocarbon chain. Select the number so that the carbonyl has the lowest possible number.

38 O. Carboxylic Acids and Esters
Carboxylic acids – contains the carboxyl group COOH General formula RCOOH Weak acids in solution

39 O. Carboxylic Acids and Esters
To name carboxylic acids Use the parent alkane name. Remove the e and replace it with oic.

40 O. Carboxylic Acids and Esters

41 O. Carboxylic Acids and Esters
Esters – a carboxylic acid reacts with an alcohol to form an ester and a water molecule General formula

42 O. Carboxylic Acids and Esters
To name esters Use the alkyl name from the alcohol followed by the acid name, where the –ic ending is replaced by –ate. isopropylethanoate

43 P. Polymers Polymers – large chainlike molecules made from many small molecules called monomers Simplest polymer – polyethylene Polyethylene results from addition polymerization.

44 P. Polymers Condensation polymerization – a small molecule (often water) is released for each addition of a monomer to the polymer chain Nylon Copolymer – 2 different types of monomers combine to form the chain


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