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Organic Chemistry
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Organic Chemistry Has Carbon 4 covalent bonds C has 4 valence e-’s
Low M.P. tetrahedral Slow reactors Poor conductors Inorganic Organic Contains only small amount of Carbon (I.e., carbides, oxides) Ionic or Covalent bonds High MP, strong intermolecular forces Contains Carbon!!!! (CHON) Covalent bonds EXCEPT CO2 it’s inorganic Hydrocarbons contain Carbon & Hydrogen ONLY!!!!!!
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Alkane Single bonds CnH2n+2 Ends in -ane Alkene One double bond CnH2n Ends in -ene H H H- C- C- H Ex. C2H4 H H H- C=C-H Ex. C2H6 Saturated All single bonds--- ALKANES ONLY!!
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Aromatic Ring CnH2n-6 Benzene Toluene Alkyne 1 triple bond CnH2n-2 Ends in -yne Ex. C2H2 H-C=C-H Unsaturated Double or triple bonds Alkenes & Alkynes
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Naming Hydrocarbons Prefix Branches 1-meth 2-eth 3-prop 4-but 5-pent
6-hex 7-hept 8-oct 9-non 10-dec F-fluoro- Cl-chloro- Br-bromo- CH3- methyl CH3CH2- ethyl
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H H H H CH3-CH2-CH2-CH-CH2-CH3 H-C- C- C- C- H CH3 H H H H Steps:
Find longest chain of carbons, circle it Name the longest chain of carbons Look for double/triple bonds (tell where they are) Look for branches, name, & tell where they are H H H H H-C- C- C- C- H H H H H CH3-CH2-CH2-CH-CH2-CH3 CH3 Ex. Ex. #2 3-methyl hexane Butane
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Characteristics of Hydrocarbons:
Contains only Carbon & Hydrogen Can be found in nature Non polar Can be straight chained or branched Low M.P. Soluble in nonpolar solvents Non electrolytes Carbon has 4 valence e-’s, so it makes 4 covalent bonds
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Isomers Same molecular formula Different structural formula Count up the atoms, put in different order C5H12 C5H12 -C-C-C-C- C -C-C-C-C-C-
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Alcohol -OH name ends in “ol” Acid End in “oic acid” -COOH -C O OH
Primary- 1 C attached to C-OH Secondary- 2 C attached to C-OH Tertiary 3 C attached to C-OH Alcohol OH name ends in “ol” Tell what C # it is on Acid End in “oic acid” Occurs at the end of a chain Conduct electricity -COOH -C O OH 2-pentanol CH3COOH Monohydroxy-1 OH Dihydroxy-2OH (diols) Trihydroxy- 3OH (glycerol) Functional Groups Table R
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Ester O -C O-C- Ether CH3CH2OCH3 -C-O-C- Functional Groups -COOC-
Occurs in the middle of a chain -COOC- Draw line between single bond O and C Single bond side (yl) Double bond side (oate) O -C O-C- Ether Occurs in middle of chain CH3CH2OCH3 H on the carbon -C-O-C- Functional Groups Branch (yl) Branch(yl) ether
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Amine Functional Groups Ketone CH3COCH3 Amide O CH3CH2CH2CONH2 O
Derivative of ammonia. Has Nitrogen Name ends in –amine Must tell what #C it’s on. -N- Ex. CH3CH2NH2 1- ethanamine Functional Groups Ketone Occurs in the middle of a chain CH3COCH3 No H on the carbon Amide Formed when one of the H’s of the amine react w/the OH of an acid to produce an amide & water. Has N and a double bonded oxygen O CH3CH2CH2CONH2 -C-N-H butanamide On the end. Ends in amide. Ends in “one” Tell what C# O -C-C-C-
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Functional Groups Aldehyde HO ends in “al” occurs at the end of a chain O -CHO -C H
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H-C-H + Cl-Cl H-C-Cl + H-Cl H H Br Br C=C + Br-Br H-C-C-H H H H H
Substitution Substitute on atom for another Alkane + diatomic Addition Add both atoms of the diatomic Alkene + diatomic CH4 + Cl2 CH3Cl +HCl C2H4 + Br2 C2H4Br2 H H H-C-H + Cl-Cl H-C-Cl + H-Cl H H Br Br C=C + Br-Br H-C-C-H H H H H Types of Organic Reactions
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Fermentation C6H12O6 ==> C2H5OH + CO2 Saponification
Enzymatic reaction (zymase) Glucose ==> ethanol + CO2 C6H12O6 ==> C2H5OH + CO2 Saponification Fatty acid + strong base==> soap R-COOH + NaOH ==> 3CH3(CH2)16- C-O-Na+ O Types of Organic Reactions
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Types of Organic Reactions Polymerization
Condensation: start with an alkane remove water Addition: start with an alkene H H H H H H H H HO-C-C-OH + HO-C-C-OH ==> HO-C-C-O-C-C-OH+H2O H H H H H H H H X(C2H4) ==> H(CH2-CH2)xH Natural : cellulose, starch, proteins Synthetic: nylon, polyethylene
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Fractional Distillation
Combustion Oxidation or burning Types of Reactions CH4 + O2 ==> CO2 +H2O Fractional Distillation A process used to separate liquids with different B.P.’s (which is boiled to produce a vapor that’s then condensed into a liquid). Cracking A controlled process by which hydrocarbons are broken down or rearranged into smaller, more useful molecules. Esterification Alcohol + acid ==> ester + water
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