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Published byDorothy Horton Modified over 9 years ago
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(2-chloro-2-methylpropane) Preparation of t-butyl chloride
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(CH 3 ) 3 COH + HCl (CH 3 ) 3 CCl + H 2 O Reaction Mechanism?
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(CH 3 ) 3 COH + H-Cl (CH 3 ) 3 COH 2 + Cl + - Leaving Group
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(CH 3 ) 3 C-OH 2 + (CH 3 ) 3 C + H2OH2O Cation
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( CH 3 ) 3 C + + Cl - (CH 3 ) 3 CCl Cation Adds Chloride
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+ sp 2 flat p tert-Butyl Cation
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Reaction Coordinate
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R.... OH 2 + + Transition State
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Animation
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Substitution Nucleophilic 1 bond at a time SN1SN1
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Increasing Stability
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Side Reaction Main Reaction
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SN1SN1 E1
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Shake t-BuOH with concentrated HCl Separate layers Wash saturated aqueous NaCl Wash saturated aqueous NaHCO 3 Dry Distill Procedure
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t-BuCl Shake t-BuOH with HCl
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NaHCO 3 + HCl CO 2 + H 2 O + NaCl Wash to remove excess HCl
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Cool receiver Distill product
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Clamp joints
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A + BC MW 100 100200 Use: 10 g A 20 g B Limiting Reagent Theoretical Yield Experimental Yield Yield Calculations
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A + BC MW 100 100200 Cpd Mass MW Moles A 10 g 100 0.10 B 20 g 100 0.20 0.10 moles x 200 = 20 g Experimental yield (%): 100 x wt product / 20 Limiting Reagent Theoretical yield:
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n-Butyl Alcohol + HBr
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Transition State
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Mechanism
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Reaction Coordinate Energy Transition State
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Substitution Nucleophilic 2 bonds at a time SN2SN2
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