Lecture Notes 9

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Unformatted text preview: .... ............. ............. ............. ............. . . . . . . . . . . . . . . . . ............. ............. . . . . . . . . . . . . . . . . . ............. ............. ·· Cl · ·· · ·· ·· Cl · Cl· ·· · ·· · ·· Cl · ·· · · Cl · · ·· · B: 6e− Be and B fulfill the octet rule in other species, e.g, BeF4 2− and BF4 − (2) Expanded Octet (Extended Valence) 3rd or higher period elements can be surrounded by more than 4 valence pairs in some compounds: d -subshell examples of compounds with five valence pairs on the central − atom: PF5 , I3 examples of compounds with six valence pairs on the central atom: GChem I – Typeset by FoilTEX – 9.18 1 · ·· F · ·· SF6 · ·· F · ·· · ·· F · ·· · ·· · ·F· ... ... ... ... ... ... ... ... . . . . ... ... ... ... ... ... ... ... . . . . . . . . . . . . . . . . S . . . . . . . . . . . . . . . . . ... ... .. ... ... ... ... .. .. ... ... ... ... ... ... ... ... . . ·F· · ·· · ·· · F ·· · ·· ·...
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