Aromatic Chemistry.

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Presentation transcript:

Aromatic Chemistry

Index Hydrocarbon basics Circles?!

Hydrocarbon basics Some extra information! Carbon ( C ) & Hydrogen ( H ) Alkanes, Alkenes, Alkynes Click for some more basics! Go to the next part!

Hydrocarbon basics: Alkanes Amount of C  *2 +2  Amount of H Alkane  single bond  stable bond Name of the molecule Formula Methane CH4 Ethane C2H6 Propane C3H8 Buthane C4H10 Pentane C5H12 Hexane C6H14 Heptane C7H16 Octane C8H18 Nonane C9H20 Decane C10H22 Ethane (C2H6)

Hydrocarbon basics: Alkenes Alkene  double bond  less stable bond For every double bond  -2 H No methene! Name changes depending on where the double bond is! Name of the molecule Formula Ethene C2H4 Propene C3H6 Buthene C4H8 Pentene C5H10 Hexene C6H12 Heptene C7H14 Octene C8H16 Nonene C9H18 Decene C10H20 3-octene, double bond is in third place

Hydrocarbon basics: Alkynes Alkynes  triple bond  the least stable bond For every triple bond -4 H No metyne! Name changes depending on where the triple bond is. Name of the molecule Formula Ethyne C2H2 Propyne C3H4 Buthyne C4H6 Pentyne C5H8 Hexyne C6H10 Heptyne C7H12 Octyne C8H14 Nonyne C9H16 Decyne C10H18 3-hexyne, triple bond is in the third place

Circles?! Theory of Kekulé  snake biting its own tail.

Questions How many carbon atoms are in butane Which of the following is an alkane? What is the shape of aromatic molecules? Why doesn’t methene exist? Which of the following is the formula of benzene? How many types of bonds does the benzene have? Who discovered the structure of benzene. How many carbon atoms are in butane Which of the following is an alkane? What is the shape of aromatic molecules? Why doesn’t methene exist? Which of the following is the formula of benzene? How many types of bonds does the benzene have? Who discovered the structure of benzene.