Chapter 6 The polyatomic molecules

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Polycationic valence compounds• HgCl : VEC A = 9; CC = 1• [Hg-Hg]Cl 2• CCl 3 : VEC A = 8.33; CC = 1• [C-C]Cl 6• SiAs : VEC A = 9; CC = 1• [Si-Si]As 26.4 Transition-metal cluster compounds6.4.1 Metal-metal bondL n M-ML n , L n M=ML n , L n M≡ML n ,… so called clusterRe 2 Cl 82-Re, d 5 s 2Re-Re 2.24Å (2.76 Å in Re crystal) Cl…Cl 3.32 ÅRe 3+ , d 4 , dsp 2 hybridization( σ bond), remain four d and one p orbitalσ ( d − d 2)π ( dπ ( dδ ( dz2xzyzxy− d− d− dzxzyzxy)))Quadruple Bond2 4 2σ π δAnalog: Mo 2 (O 2 CR) 4 and Cr 2 (O 2 CR) 4[Re2Cl8] 2-
6.4 Transition-metal cluster compounds6.4.1 Metal-metal bondL n M-ML n , L n M=ML n , L n M≡ML n ,… so called clusterIr(CO) 3IrIr(CO) 3Ir(CO) 3(CO) 3Ir 4 (CO) 126.4.2 Cluster geometryi. Structural polyhedron
Page 1 and 2: §6 The polyatomic molecules (B)6.1
Page 3 and 4: Chemical bonds in Boranes(a) Single
Page 5: polyhedra with n vertices“Closo
Page 8 and 9: Alkali metals and alkali earth meta
Page 10 and 11: 6.2.1 Coordination polyhedronmolecu
Page 12 and 13: A. Crystal field splitting1. spectr
Page 14 and 15: II. Crystal-Field TheoryB. Magnetic
Page 16 and 17: Energetic diagram of σ molecular o
Page 18 and 19: 18-electron rule• Many ligands do
Page 20 and 21: Generalized 8 - N rulePearson (1964
Page 24 and 25: ii.Electron countingb=12(18n−g)b:
Page 26 and 27: Tetranuclear compoundsIr 4 (CO) 12
Page 28: 2. Carbon nanotubes200 nm 1µm6.6 H

Chapter 6 The polyatomic molecules

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