Chapter 6 The polyatomic molecules

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ii.Electron countingb=12(18n−g)b: bond valence (total number of metal-metal bonds)n: number of metal atomsg: total electrons in valence shell, including allIn the case that main group atoms are included:b=12(18n1 + 8n2− g)
iii. Bond valence and the cluster geometryb=12(18n−g)Tri-nuclear compoundsMetal cluster compoundsOs 3(CO) 9(μ 3-S) 2g50b2M-M/pmOs-Os,281.3OsOsOsMn 2Fe(CO) 14Fe 3(CO) 12504823Mn-Fe,281.5Fe-Fe,281.5Mn Fe MnFeFeFeOs 3H 2(CO) 104642Os-Os,281.5Os[Mo 3(μ 3-O)(μ 2-O) 3F 9)] 5-Re 3(μ 2-Cl) 3(CH2SiMe 3) 6423669Os=Os,268.0Mo=Mo,250.2Re≡Re,238.7OsMoReMoOsMoReRe
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 22 and 23: Polycationic valence compounds• H
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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