Chapter 6 The polyatomic molecules
Chapter 6 The polyatomic molecules
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-
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