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Organic Chemistry Note.docx

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Department
Chemistry
Course
CHM1321
Professor
Laura Byrne
Semester
Winter

Description
Organic Chemistry Note 2/14/2013 5:35:00 AM 6 methods to compare Bases  use only 1 at a time A) For elements in the same row of periodic table  Electronegativity o Eg: C < N < O < F o ---------- EN increases  better stabilization of electrons or –ve charge  more stable o O  ex. CH 3 O – H  CH – O3 o (Stronger Acid) (Weaker Base) o vs B  CH – NH  CH – NH - 3 2 3 o (Weaker Acid) (Stronger Base) O is to the right of N in per. Table thus More EN  More Stable B) For elements in the same column in Periodic Table Cl  F< < Br < I ------  Size inceases - o More stabilization, because of less e repulsion (charge is spread over more volume, better )  Fluorine really EN, but can’t handle a –ve charge B o Ex: CH – O – H  CH O - Sulfur below oxygen, 3 3 B (Stronger Base) Bigger atom, stablize
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