CHEM 281-2011-3 Crash Course in Molecular Lego

CHEM 281-2011-3 Crash Course in Molecular Lego -...

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Crash-course in Molecular Lego: Building Molecules with Carbon and Hydrogen Atoms Here I’m using the Lewis structures of the atoms (i.e., just showing the valence shell electrons) to construct molecules and then I’m showing various schematic / pictorial representations of molecules (for molecular hydrogen and several hydrocarbons). Hydrogen Molecule (H 2 ). The two hydrogen atoms are connected by a single covalent bond. Saturated Straight Chain Hydrocarbons (Alkanes). Methane (CH 4 ): (C + 4 × H). Both the valence shells of C and H are filled in the methane molecule. Ethane (C 2 H 6 ): (2 × C + 6 × H). CC H H H H H H H 3 CCH 3 CH 3 CH 3 C C H H H H H H H H H H H H C 2 H 6 Propane (C 3 H 8 ): (3 × C + 8 × H).
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Butane, Pentane, Hexane, Heptane, Octane, Nonane and Decane: Saturated Branched Hydrocarbons (Alkanes). There are “constitutional isomers” of butane, pentane and hexane etc. ( i.e. the same molecular formula but the atoms are connected in a different manner). Isobutane (2-Methylpropane):
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This note was uploaded on 09/25/2011 for the course CHEM 281 taught by Professor Williams during the Spring '11 term at Simon Fraser.

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CHEM 281-2011-3 Crash Course in Molecular Lego -...

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