Concept explainers
Interpretation:
The curved arrow notation is to be drawn for the proton transfer between ammonia
Concept introduction:
In a proton transfer reaction, a proton is transferred from a Bronsted–Lowry acid (proton donor) to a Bronsted–Lowry base (proton acceptor) in a single elementary step in which one bond is broken and another is formed simultaneously. The conjugate acid is the species that the base becomes after gaining a proton, and the conjugate base is the species that the acid becomes after losing a proton. The curved arrow notation shows the movement of valence electrons, not atoms. Each double-barbed curved arrow shows the movement of two valence electrons. To represent bond breaking, the tail of the arrow originates from the center of a bond whereas to represent bond formation, the head of the arrow points to an atom that forms the new bond, that is,
Answer to Problem 6.1P
The curved arrow notation for the proton transfer between ammonia
Explanation of Solution
The given proton transfer reaction is between ammonia
The bond breaking and bond formation involves only valence electrons, so first, we need to draw all valence electrons in the given two reactants. From this, it is clearly seen which electrons are involved in the reaction, both from the reactants and from the products as shown below:
The appropriate movement of these valence electrons is shown by using curved arrow notations. One curved arrow is to be drawn from the lone pair on N to the H on water to illustrate the formation of
The curved arrow notation for the proton transfer of the given reaction is drawn on the basis of movement of valence electrons involved in bond breaking and bond formation.
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Chapter 6 Solutions
Organic Chemistry: Principles and Mechanisms (Second Edition)
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