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Rules for Bonding in Organic Chemistry Every atom but Hydrogen MUST have 8 electrons while bonded. –Carbon forms 4 bonds (C has 4 valence e - ) –Nitrogen.

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Presentation on theme: "Rules for Bonding in Organic Chemistry Every atom but Hydrogen MUST have 8 electrons while bonded. –Carbon forms 4 bonds (C has 4 valence e - ) –Nitrogen."— Presentation transcript:

1 Rules for Bonding in Organic Chemistry Every atom but Hydrogen MUST have 8 electrons while bonded. –Carbon forms 4 bonds (C has 4 valence e - ) –Nitrogen forms 3 bonds (N has 5 valence e - ) –Oxygen forms 2 bonds (O has 6 valence e - ) –Hydrogen forms 1 bond (H breaks the octet rule) –Halogens form 1 bond (all have 7 valence e - ) The Octet Rule!

2 Organic Chemistry Rules for naming organic compounds –Determine longest straight carbon chain –Locate All Functional Groups –Follow rules for All Functional Groups Organic Compounds are made from non- metals forming covalent bonds with each other.

3 The Big Eight Functional Groups of Organic Compounds AlcoholsAlcohols AldehydesAldehydes AminesAmines Carboxylic AcidsCarboxylic Acids EstersEsters EthersEthers HalidesHalides KeytonesKeytones

4 Identifying Alcohols R-O-H an oxygen atom is inserted between any carbon atom and one of its hydrogen atoms in a hydrocarbon To Name:To Name: # of C the “O” is bound to -hydrocarbon and change the ending “-e” to “-ol” Example:Example: H H H H-C-C-C-O-H H H H.. 1-propanol

5 Naming and Drawing Alcohols H H H H H-C-C-C-C-O-H H H H H ethanol 1-butanol H H H-C-C-H H :O: H..

6 Identifying Aldehydes A Terminal carbonyl group (C=O) on a carbon chain. :O: R– C – H To Name: To Name: Name the carbon chain, add the ending “-al” rather than “e” Example: Example: H H :O: H-C-C- C-H H H propanal

7 Naming and Drawing Aldehydes H :O: H–C– C–H _______________ H pentanal ethanal H H H H :O: H-C-C-C-C-C-H H H H H

8 Identifying Amines A terminal -NH 2 group on a carbon chain. To Name:To Name: carbon chain “-yl” “amine” H H H Example:Example: H–C C – C – N-H H H H H.. amine Propyl

9 Naming and Drawing Amines H HH H H–C – C – C – C – N –H ____________ H H H H H.. Butyl amine.. Methyl amine H H H–N – C –H H

10 Identifying Carboxylic Acids :O: A terminal R-C-O-H group on a carbon chain Name: Name: carbon chain “–oic acid” H H :O: Example: Example: H–C – C – C-O-H H H.. propanoic acid

11 Naming and Drawing Carboxylic Acids ethanoic acid H H H H :O: H–C – C – C – C – C-O-H H H H H.. Pentanoic acid H :O: H :O: H–C – C -O-H H–C – C -O-H H..

12 Identifying Esters :O: A carbon chain broken by R–C- O-R’ To Name To Name: C=O chain“-yl” long chain “-oate” H :O: H H H Example: Example:H-C – C-O-C- C-C-H H H H H Ethyl propanoate..

13 Naming and Drawing Esters H H :O: H H H H H-C-C- C-O-C-C- C-C-H __________ H H H H H H ethyl methanoate.. Propyl butanoate H :O: H H-C- C-O-C-H H H

14 Identifying Ethers An oxygen atom breaks up a chain of carbon atoms into two chains: R-O-R’ To Name: To Name: short carbon chain “-yl”, long carbon chain”-yl” “ether” Example: Example: H H H H H H H H-C-C-C-C-O-C-C-C-H H H H H H H H.. Propyl-butyl ether

15 Naming and Drawing Ethers H H H H H H H H H H H-C-C-C-C-C-C-O-C-C-C-C-H H H H H H H H H H H methyl propyl ether.. Butyl hexyl ether.. H H H H H-C-O-C-C-C-H H H H H

16 Identifying Halides A hydrogen has been replaced by one of the halogens (F, Cl, Br, I orAt) To Name:To Name: “# carbon of substitution”- “prefix of halogen–o” – “longest carbon chain” Example:Example: H H H H H H H-C-C-C-C-C-C-H H H Cl H H H 3-chloro-hexane

17 Naming and Drawing Halides H H H F H H-C-C-C-C-C-H________________ H H H H H 2-bromo-propane 2 – fluoro-pentane H Br H H-C-C-C-H H H H

18 Identifying Keytones :O: R–C–R’ An oxygen atom is doubly bound to a carbon atom in the middle of a carbon chain To Name: To Name: carbon chain with the # carbon of the carbonyl group ending in “-one” Example: Example: H :O: H H H C H-C –C – C-C C -H H H H H 2-pentanone

19 Naming Keytones H H :O: H H H H H-C-C–C–C-C-C-C-H H H H H H H 2-hexanone 3-heptanone H :O: H H H H H-C – C – C -C-C-C-H H H H H H


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