Review Predicting Molecular Geometries: 分子构型 Total Electron- Electron Pair Bonding Nonbonding Molecular Pairs Geometry Pairs Pairs Geometry Example 4 pairs 4 0 Tetrahedral Tetrahedral四面体 正四面体 3 1 Trigonal pyramid 三角锥 2 2 B Bent折线形
Predicting Molecular Geometries: Review 分子构型 四面体 三角锥 折线形 正四面体
Review Central atoms with Expanded Valence Shells: 分子构型 Number of Electron- Electron Pair Bonding Nonbonding Molecular Pairs Geometry Pairs Pairs Geometry Example B 5 pairs 5 0 Trigonal 三角双锥 Trigonal 三角双锥 bipyramidal ipyramidal Axial 4 1 B B 跷跷板 Seesaw Equatorial 90° 3 2 T-型 T-shaped 120 2 3 直线型 Linear
Central atoms with Expanded Valence Shells: 分子构型 三角双锥 三角双锥 Review 跷跷板 T-型 直线型
Review Central atoms with Expanded Valence Shells: Number of Electron- Electron Pair Bonding Nonbonding Molecular Pairs Geometry Palrs Palrs Geometry Example 6 pairs 6 0 Octahedral 八面体○ctahedral 八面体 5 1 B B 90° 四角锥型 Square pyramidal B 4 2 90° B Square 平面四方形 planar
Central atoms with Expanded Valence Shells: 八面体 Review 八面体 四角锥型 平面四方形
9.4 Covalent bond and orbital overlap 轨道的重叠 Basic idea:"Covalent bonds are formed by the overlap of atomic orbitals,one from each of the two bonding atoms.” Valence bond theory:t 价键理论 Covalent bonds are formed by sharing of electrons from overlapping atomic orbitals. Quantum mechanics
9.4 Covalent bond and orbital overlap • Basic idea: “Covalent bonds are formed by the overlap of atomic orbitals, one from each of the two bonding atoms.” 轨道的 重叠 Valence bond theory: Covalent bonds are formed by sharing of electrons from overlapping atomic orbitals. Quantum mechanics 价键理论
Valence Bond Theory (VBT) 价键理论 H-CI:H=1s1 Cl=1s22s22p63s23p5 1s 3Px Is 3p The overlap of the Is orbital of H and the 3p orbital in CL
Cl = 1s22s22p6 3s2 H = 1s1 3p5 Valence Bond Theory (VBT) H-Cl: 价键理论 The overlap of the 1s orbital of H and the 3p orbital in Cl. 1s 3p