2. Polar Covalent Bonds: Acids and Bases. Based on McMurry’s Organic Chemistry , 7 th edition. Why this chapter?. Description of basic ways chemists account for chemical reactivity. Establish foundation for understanding specific reactions discussed in subsequent chapters.
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Based on McMurry’s Organic Chemistry, 7th edition
• Atomic sulfur has 6 valence electrons.
Dimethyl suloxide sulfur has only 5.
• It has lost an electron and has positive charge.
• Oxygen atom in DMSO has gained electron and has (-) charge.
• Occur between polar molecules as a result of electrostatic interactions
• Forces can be attractive of repulsive depending on orientation of the
• Occur between all neighboring molecules and arise because the electron distribution within molecules that are constantly changing
• Most important noncovalent interaction in biological molecules
• Forces are result of attractive interaction between a hydrogen bonded to an electronegative O or N atom and an unshared electron pair on another O or N atom