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IUPAC Nomenclature

IUPAC Nomenclature. of. Organic Compounds. In Chemistry, an organic compound is one containing carbon atoms. Carbon has 4 valance electrons and makes four bonds. Carbon combines with many other carbon atoms making chains and rings which other atoms can be attached. .

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IUPAC Nomenclature

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  1. IUPAC Nomenclature of Organic Compounds

  2. In Chemistry, an organic compound is one containing carbon atoms. Carbon has 4 valance electrons and makes four bonds Carbon combines with many other carbonatoms making chains and ringswhich other atoms can be attached. There are a plethora of different organic compounds in our world.

  3. Naming Alkane Hydrocarbons methane ethane propane butane pentane hexane heptane

  4. octane nonane decane undecane dodecane

  5. Alkyl Groups Attached to Chain CH3 methyl CH2 CH3 ethyl propyl CH2 CH2 CH3 CH2 CH2 CH3 butyl CH2

  6. Naming Alkanes- hydrocarbons with single bonds

  7. C C C C C C C C C C C The longest chain is octane methyl The substituents are ethyl attachments ethyl 1 2 3 4 5 7 6 8 5 4 too big Number the carbons on the longest chain so that substituents have the lowest numbers 6 3 2 1 Name using alpha order for substituents start here Dashes between a number and a letter methyl 4-ethyl -3-methyl octane

  8. C C C C C C C C methyl methyl 3 4 5 6 2 3,3-dimethylhexane 1 Must use 3 twice because there are 2 methyl groups

  9. C4H10 has two structural isomers: Same formula but different structure CH3 C CH3 CH3 H CH2 CH3 CH2 CH3 The isomers have different connectivity and are different chemicals Try drawing a different isomer with four carbons There are no other isomers

  10. The alkane, C5H12 , has three structural isomers. Try to build three different molecules with 5 carbons and 12 hydrogens (using only single bonds), then draw it.

  11. C5H12 has the following three structural isomers: CH3 CH3 C CH3 CH2 CH3 C CH3 CH3 H CH3 CH2 CH3 CH2 CH2 CH3

  12. Practice Questions

  13. C C C C Question 1: What is the correct IUPAC name?

  14. C C C C Question 1: What is the correct IUPAC name? Answer: butane

  15. Question 2: What is the correct IUPAC name? CH2 CH3 CH3

  16. Question 2: What is the correct IUPAC name? CH2 CH3 CH3 Answer: propane

  17. C C C C C C What is the correct IUPAC name? 2, 2-dimethylbutane

  18. Question 4: What is the correct IUPAC name? CH3 C CH3 CH2 CH CH2 CH3 CH3 CH2 CH3 CH2 CH2

  19. Question 4: What is the correct IUPAC name? CH3 C CH3 CH2 CH CH2 CH3 3 5 CH3 CH2 CH3 CH2 CH2 3,3–dimethyl-5-ethyloctane

  20. Draw the structural formula for 2-methylbutane 2 CH2 CH3 CH CH3 CH3 CH3 or CH CH3 CH2 CH3 2

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