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Organic Chemistry Main Menu Lecture 1: Introduction to Molecular Orbitals Lecture 10: Intermolecular Forces and Intro to Reactivity Lecture 11: Alkenes as Nucleophiles I Lectures 12 and 13: Alkenes II & III Lecture 14: Benzenes as Nucleophiles I Lecture 15 objectives and skills Lecture 2: Molecular Orbitals in Organic Structures Lecture 3: Molecular Orbitals and Resonance Lecture 4: Molecular Orbitals and Aromaticity Lecture 5: Nomenclature and IR Spectroscopy Lecture 6: Stereochemistry I Lecture 7: Stereochemistry II Lecture 8: Newman and Fisher Projections Lecture 9: Conformations and Cyclohexane Rings

SOLUTION E21.1a 2

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SOLUTION E21.1a The second reaction is faster. Substrate and base are the same, but ^-OCH₃ acts as a stronger base in aprotic solvent (DMF). In E2 reactions, strength of base affects the activation energy.
The second reaction is faster. Substrate and base are the same, but concentration of base is greater in the second (twice as much, so twice as fast). In E2 reactions, concentration of base affects the rate as it is part of the rate equation.