Ch2slides - Writing(Drawing Chemical Structures H H C H H H...

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1 Writing (Drawing) Chemical Structures CH 3 CH 2 CHCH 3 CH 3 CH 2 CH(CH 3 ) 2 H C C H H C C C H H H H H H H H H CH 3 Kekule Condensed Skeletal Skeletal Notation 1. Carbon atoms are at the ends of lines and at the intersection of two lines 2. Hydrogens on carbon atoms are not shown. 3. All non-carbon and non-hydrogen atoms (heteroatoms) are shown. 4. Hydrogens on heteroatoms are shown 5. Formal Charges are shown Polar Covalent Bonds: covalent bonds in which the electrons are not equally shared between the two atoms. The is a net dipole. Electronegativity: intrinsic ability of an atom to attract electrons Inductive Effect: atom’s (or group of atoms) ability to polarize a bond through electronegativity differences Chapter 2: Polar Covalent Bonds and Their Consequences
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2 Electronegativity tends to decrease down a period, and increase across a row (from left to right Resonance C N H H H O O _ C N H H H O _ O + + C C C C C C H H H H H H C C C C C C H H H H H H nitromethane benzene Which is the correct structure?
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