Chapter1

Chapter1 - Structure and Bonding in Organic Molecules...

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Structure and Bonding in Organic Molecules Chapter 1 Sections: Preface, 0-9 Exercises: 1a, 2, 3, 4, 5, 6, 7, 8, 9, 13, 14, 15, 16, 17, 18 Problems: 19, 20, 21, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 37, 38, 39, 41, 42, 44, 47, 48, 49, 50 Models/explanations of observed bonding within molecules Octet Rule Lewis Dot Structures Resonance Atomic orbital theory Molecular orbitals Hybridization KEY MESSAGE OF THIS CHAPTER We use models to explain and predict molecular geometry/shape and predict reactivity
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Chapter 1 - Bonding To break a stable bond requires energy input. Conversely, energy is released when bonds are formed. These interactions are governed by the principles of charge repulsion and attraction. Opposite charges attract, like charges repel. Electrons are attracted to protons, and electrons will spread out to minimize interactions with each other. As two atoms approach each other, their nuclei interact with the electron clouds associated with them in a manner described by Coulomb’s Law The sharing of this electron density constitutes the bond forming process
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Chapter 1 - Bonding Alternative to this sharing of an electron in the formation of a bond is the complete transfer of an electron resulting in two ions that attract each other. Covalent vs Ionic bonding Where do the electrons within the bond reside? How are they distributed around the nuclei? What constitutes a stable configuration of electrons and nuclei? Need models that we can use to visualize, explain and predict the behavior of bonds. Octet Rule. Atoms will attain a noble gas configuration of electrons – a stable configuration in which the outer shell is completely filled with electrons. Octet refers to the eight electrons in the outer shells of all noble gases except He
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Chapter1 - Structure and Bonding in Organic Molecules...

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