wk7_lecture_2 - Friday is Chemistry Research Day Posters in...

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1 1 This Friday is Chemistry Research Day Friday is Chemistry Research Day Posters in SAC Ballroom 10:30 am 12 pm 1:30 - 3 pm As part of Chemistry Research Day and the 50 th anniversary, there will be a special symposium featuring lectures by Professor Francis Bonner, SBU Dr. Joseph Frank, SBU „74, 77, 81, NIH Prof Brian Kuhlman, SBU „98, UNC Chapel Hill Prof Elizabeth Boon, SBU Friday afternoon 4 6 pm in SAC Auditorium 3 4 + C Cl H H HC C l Cl + C C H H HC Which reactant is the acid? A B 5 + C Cl H H H Cl + C N H H H N H H Which reactant is the base? A B 6 base acid acid base Nu + C X C Nu X + nucleophile electrophile d+ d-
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7 H O + C Cl H H H + Cl C HO H H H acid base base acid nucleophile electrophile 8 energy reaction ΔG ° ΔG ° = ΔH ° - TΔS ° H O + C Cl H H H + Cl C HO H H H 9 H O + C Cl H H H + Cl C HO H H H reaction ΔG ° Factors favoring the products: free energy enthalpy entropy ΔG ° = ΔH ° - TΔS ° 10 reaction ΔG ° 1. Chloride ion is more stable than hydroxide ion (see pK a s). 330 kJ/mole 355 kJ/mole 2. The O C bond is more stable than the C Cl bond. H O + C Cl H H H + Cl C HO H H H Factors favoring the products: ΔG ° = 100 kJ/mol 11 H O + C Cl H H H + Cl C HO H H H reaction ΔG ° if ΔG ° = - 100 kJ/mole ΔG ° = -RT ln K eq K eq = e Δ RT temperature ( K ) constant (0.00831 kJ/ K ) K eq = 3.4 x 10 17 at 298 °K 12 reaction Δ G ΔG H a b c
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wk7_lecture_2 - Friday is Chemistry Research Day Posters in...

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