Organic Chemistry, 5th Edition L.G. Wade. Jr Chapter 2 Structure and Properties of Organic Molecules Jo blackburn Richland college, dallas TX Dallas County Community College District c 2003. Prentice hall
Chapter 2 Structure and Properties of Organic Molecules Organic Chemistry, 5th Edition L. G. Wade, Jr. Jo Blackburn Richland College, Dallas, TX Dallas County Community College District © 2003, Prentice Hall
Wave Properties of electrons Standing wave vibrates in fixed location Wave function, v, mathematical description of size, shape orientation Amplitude may be positive or negative Node: amplitude is zero > the 2 p, orbital Chapter 2
Chapter 2 2 Wave Properties of Electrons • Standing wave vibrates in fixed location. • Wave function, , mathematical description of size, shape, orientation • Amplitude may be positive or negative • Node: amplitude is zero + _ + - =>
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 3 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. =>
Sigma Bonding Electron density lies between the nuclei a bond may be formed by s-s, p-p, s-p or hybridized orbital overlaps The bonding mo is lower in energy than the original atomic orbitals The antibonding Mo is higher in energy than the atomic orbitals > Chapter 2
Chapter 2 4 Sigma Bonding • Electron density lies between the nuclei. • A bond may be formed by s-s, p-p, s-p, or hybridized orbital overlaps. • The bonding MO is lower in energy than the original atomic orbitals. • The antibonding MO is higher in energy than the atomic orbitals. =>
2: overlap node antibonding g energy Is tomic orbital atomic orbital bonding molecular orbi Chapter 2
Chapter 2 5 H2 : s-s overlap =>