1Intro - Thermodynamics: why reactions occur Kinetics: how...

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Thermodynamics : why reactions occur Kinetics : how reactions occur Organic chemistry : chemistry of carbon chemistry of life Bonding Lewis dot structures : valence e - used in bonding group # “noble gas” # valence e - = = 8 valence e -
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Lewis structures 1. Determine # valence e - 2. Place least electronegative element in center (never H) CH 3 OH element group number e - C IV 4 H I 1 O VI 6
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NaCl = non-polar covalent 0.4 polar covalent 0.5-1.8 Cl-Cl = 3.0 - 3.0 = 0.0 covalent C-O = C-H = 3.0 - 0.9 = 2.1 ionic 3.5 - 2.5 = 1.0 polar covalent 2.5 - 2.1 = 0.4 covalent
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Lewis structures 1. Determine # valence e - 2. Place least electronegative element in center (never H) 3. Make single bond (2e - ) between each pair of atoms 4. Use remaining e - to satisfy octet rule 5. Use double or triple bonds to reduce # of unshared e - C
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Lewis structures CH 3 OH C H O valence e - 4 4 6 14 e - C O H H H H : : : :: :
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Lewis structures COCl 2 C O Cl valence e - 4 6 14 24 e - formal charge C O Cl Cl .. .. .. .. .. .. .. .. group number - unshared e
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1Intro - Thermodynamics: why reactions occur Kinetics: how...

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