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Pi bond

hybrization

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Worksheet ? Hybridization One model to explain bonding in molecules is called the valence bond theory. It is based on the concept of hybridized molecular orbitals. Atomic orbitals (s,p,d) are mathematically mixed to form molecular orbitals with defined shapes and energy levels. In organic chemistry, we need only look at the hybridization of the one 2s and three 2p orbitals containing the valence electrons of C,O and N. When four equivalent molecular orbitals are needed, all four atomic orbitals are mixed to give sp3 hybridization. When three equivalent molecular orbitals are needed, three of the atomic orbitals are mixed to give sp2 hybridization. In this case, one unhybridized p atomic orbital remains, with its shape and energy level

Organic Chemistry Lecture 2

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Chapter 2 ? 2010, Prentice Hall Organic Chemistry, 7th Edition L. G. Wade, Jr. Structure and Properties of Organic Molecules Chapter 2 * Wave Properties of Electrons Standing wave vibrates in fixed location. Wave function, ?, is a mathematical description of size, shape, and orientation. Amplitude may be positive or negative. Node: Amplitude is zero. Chapter 2 Chapter 2 * Wave Interactions Linear combination of atomic orbitals: between different atoms is bond formation. on the same atom is hybridization. Conservation of orbitals Waves that are in phase add together. Amplitude increases. Waves that are out of phase cancel out. Chapter 2 Chapter 2 * Sigma Bonding Electron density lies between the nuclei. A bond may be formed by s?s, p?p, s?p, or hybridized orbital overlaps.

Notes

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Name: _________________________________ What You Need To Know for the Chemistry Regents Exam The Test The Chemisty Regents Exam is broken down into three sections: Part A: 35 mulitple choice questions from all units covered over the course of the school year. Part B: Approximately 25 questions, with a mix of short answer and multiple choice. Questions focus on the Reference Tables, graphing, and laboratory experiments. Part C: Approximately 15 short answer questions, most broken down into smaller parts. This is often an eclectic, unpredictable mix of questions from various units, and may demand students write short paragraphs, use equations and reference tables, or draw graphs and diagrams in order to correctly answer the questions.
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